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3 août 2024
| 18:01 | Dimensionner une installation photovoltaïque autonome/en (199 modifications | historique) . . (-3 415) . . [Aurelpere (199×)] | ||
| 18:01 (actu | diff) . . (-60) . . Aurelpere (discussion | contributions) (Page créée avec « <pre> import pandas as pd import sys import os import math import time # Ask user to enter latitude and longitude x_input = input("Enter latitude: ") y_input = input("Ente... ») | |||
| 17:58 (actu | diff) . . (+23) . . Aurelpere (discussion | contributions) (Page créée avec « '''<u>Piece of logic coded in python: (update 8.4.24: added comments and input angle and orientation and battery discharge)</u>''' ») | |||
| 17:58 (actu | diff) . . (-63) . . Aurelpere (discussion | contributions) (Page créée avec « Python relies on C libraries for a few basic tasks, and hack, including scientific hack, is nevre impossible, but we will put aside these consideration pro-lowtech that do... ») | |||
| 17:57 (actu | diff) . . (-109) . . Aurelpere (discussion | contributions) (Page créée avec « We are in 2024 and if you are targeted by surveillance and shackle anti eco terrorist measures like me, and as a good scientist, you would inspect your instruments before... ») | |||
| 17:57 (actu | diff) . . (-71) . . Aurelpere (discussion | contributions) (Page créée avec « Think to activate virtual environment in which the pandas was installaed each time you use the script (after a reboot for example) by typing: ») | |||
| 17:57 (actu | diff) . . (+3) . . Aurelpere (discussion | contributions) (Page créée avec « cd ~ && python -m venv venv ») | |||
| 17:56 (actu | diff) . . (-11) . . Aurelpere (discussion | contributions) (Page créée avec « To do so, here are the commands to enter in a linux debian before launching the script processing.py to be ok ») | |||
| 17:56 (actu | diff) . . (-75) . . Aurelpere (discussion | contributions) (Page créée avec « However, you have to install pandas library which is massively used in finance industries and in science, in particular for its time series and data vectorization capacities ») | |||
| 17:56 (actu | diff) . . (+5) . . Aurelpere (discussion | contributions) (Page créée avec « Under linux, python is generally installed and to use the python code shared in this tutorial, you just have to copy and paste the code in a text file processing.py and th... ») | |||
| 17:56 (actu | diff) . . (-27) . . Aurelpere (discussion | contributions) (Page créée avec « To use python under another os than linux, cope with being on a proprietary system ») | |||
| 17:56 (actu | diff) . . (-7) . . Aurelpere (discussion | contributions) (Page créée avec « <u>Software requirements</u> ») | |||
| 17:56 (actu | diff) . . (-33) . . Aurelpere (discussion | contributions) (Page créée avec « We start at full battery and we test each day if the battery storage minus the consumption plus the photovoltaic production leads to a blackout or allows to meet the daily... ») | |||
| 17:56 (actu | diff) . . (0) . . Aurelpere (discussion | contributions) (Page créée avec « We iterate 14 times the power with 1/3*power0 kWc steps We iterate 40 times the capacity of the batteries by step of 1/2*battery0 kWh We iterate 20 times the acceptable da... ») | |||
| 17:55 (actu | diff) . . (-32) . . Aurelpere (discussion | contributions) (Page créée avec « For the iteration loop: we start at power0=(dailyconsumption)/2 (hypothesis winter 1kWc produces 2kWh on average) we start at battery0=(dailyconsumption)/0,8 with lithium... ») | |||
| 17:55 (actu | diff) . . (-8) . . Aurelpere (discussion | contributions) (Page créée avec « explanations: the code is commented to explain what is being done and the names of variables are relatively explicit ») | |||
| 17:55 (actu | diff) . . (-54) . . Aurelpere (discussion | contributions) (Page créée avec « We will now use a piece of python code to iterate (a bit on the principle of tries and errors) by raising progressively the power of the modules, the capacity of the batte... ») | |||
| 17:55 (actu | diff) . . (-9) . . Aurelpere (discussion | contributions) (Page créée avec « Sizing optimisation ») | |||
| 17:55 (actu | diff) . . (-68) . . Aurelpere (discussion | contributions) (Page créée avec « In any case, if you use lead bateries, use a regulator to avoid to keep on chargin your fully charged batteries (risks of hydrogen prodution) -or if you dont use batteries... ») | |||
| 17:55 (actu | diff) . . (-78) . . Aurelpere (discussion | contributions) (Page créée avec « It is for example surprising no bms exist to balance automatically lead acid batteries, which would make usable all car batteries disposed to sotre photovoltaic energy wit... ») | |||
| 17:55 (actu | diff) . . (-63) . . Aurelpere (discussion | contributions) (Page créée avec « We can of course wonder if all this is not a way to make electric storage more expensive with vms components artificially expensive and if this is not a way to avoid reuse... ») | |||
| 17:55 (actu | diff) . . (-42) . . Aurelpere (discussion | contributions) (Page créée avec « In reality, the regulator is already a "bms". In theory, the embeded bms makes sure voltage and amperage of each unit of the battery is the same and balances them when needed ») | |||
| 17:55 (actu | diff) . . (-7) . . Aurelpere (discussion | contributions) (Page créée avec « We often talk about "battery management system" (bms) "embedded" for lithium ion batteries ») | |||
| 17:55 (actu | diff) . . (-98) . . Aurelpere (discussion | contributions) (Page créée avec « We must recall batteries are units of low voltage put together in serie and paralell to botain a generator with a target voltage and amperage and doing the same with full... ») | |||
| 17:54 (actu | diff) . . (-40) . . Aurelpere (discussion | contributions) (Page créée avec « In this case, your battery will only charge every other day (depending on the charge trigger treshold) ») | |||
| 17:54 (actu | diff) . . (-17) . . Aurelpere (discussion | contributions) (Page créée avec « creating risks of explosion, degassing for lead batteries ») | |||
| 17:54 (actu | diff) . . (-23) . . Aurelpere (discussion | contributions) (Page créée avec « creating potential differences between the batteries producing discharges from one battery to another ») | |||
| 17:54 (actu | diff) . . (-1) . . Aurelpere (discussion | contributions) | |||
| 17:53 (actu | diff) . . (-19) . . Aurelpere (discussion | contributions) (Page créée avec « Chargin on batteries in paralelle or in serie on second hand batteries which have not the same amperage an voltage is theorethically risky. Indeed you can read a bit every... ») | |||
| 17:53 (actu | diff) . . (-35) . . Aurelpere (discussion | contributions) (Page créée avec « In theory, the charge current diminishes when the battery is neraly full ») | |||
| 17:53 (actu | diff) . . (-34) . . Aurelpere (discussion | contributions) (Page créée avec « absorption (for mppt): the charging voltage rises a bit to create a potential difference to continue to charge the batterie almost full ») | |||
| 17:53 (actu | diff) . . (-3) . . Aurelpere (discussion | contributions) (Page créée avec « In addition, it's important to take precautions because the charge of the battery can be risky ») | |||
| 17:53 (actu | diff) . . (-29) . . Aurelpere (discussion | contributions) (Page créée avec « floating: the regulator alterns open and closed at a frequency to maintain the battery charged ») | |||
| 17:53 (actu | diff) . . (-3) . . Aurelpere (discussion | contributions) (Page créée avec « bulk: the regulator lets the current pass ») | |||
| 17:53 (actu | diff) . . (+1) . . Aurelpere (discussion | contributions) (Page créée avec « The regulator has 3 phases: ») | |||
| 17:53 (actu | diff) . . (-32) . . Aurelpere (discussion | contributions) (Page créée avec « This is a parameter to take into account if your consumption is very low ») | |||
| 17:52 (actu | diff) . . (-65) . . Aurelpere (discussion | contributions) (Page créée avec « Indeed, if the power taken from the battery is too low, it is possible that the time necessary to discharge it with your daily consumption to triggers the charge will be l... ») | |||
| 17:52 (actu | diff) . . (-61) . . Aurelpere (discussion | contributions) (Page créée avec « There's finaly a last point to be cautious with: the trigger of the battery charge by the regulator (which triggers when the voltage of the battery goes below a treshold) ») | |||
| 17:52 (actu | diff) . . (-17) . . Aurelpere (discussion | contributions) (Page créée avec « -either mount in serie/paralelle to adjust voltage and amperage to the characteristics of your regulator ») | |||
| 17:52 (actu | diff) . . (-17) . . Aurelpere (discussion | contributions) (Page créée avec « -either mount all the pannels in paralell (which will raise the amperage) ») | |||
| 17:52 (actu | diff) . . (-49) . . Aurelpere (discussion | contributions) (Page créée avec « -either mount all the pannels in serie(which will lead to a higher voltage and it might be difficult to find an adequate regulator) ») | |||
| 17:52 (actu | diff) . . (-24) . . Aurelpere (discussion | contributions) (Page créée avec « To size correctly the regulator, we can: ») | |||
| 17:52 (actu | diff) . . (-27) . . Aurelpere (discussion | contributions) (Page créée avec « The charge current is calculated by dividing by 4 or 5 the nominal capacity of the battery expressed in Ah, which should then charge in 4 to 5h. However, a battery can rec... ») | |||
| 17:52 (actu | diff) . . (-26) . . Aurelpere (discussion | contributions) (Page créée avec « Amperage will also depend on the storage capacity of your batteries, sized to cover your needs during the time periode defined at sizing. ») | |||
| 17:52 (actu | diff) . . (-23) . . Aurelpere (discussion | contributions) (Page créée avec « note: if the storage system or the device connected to the pannel doesnt absorb all the produced power, and if the regulator doesnt cut the circuit, the rest of energy wil... ») | |||
| 17:51 (actu | diff) . . (-4) . . Aurelpere (discussion | contributions) (Page créée avec « recall E=P*t keeps equal in a closed system). ») | |||
| 17:51 (actu | diff) . . (-1) . . Aurelpere (discussion | contributions) (Page créée avec « (recall P=U*I ») | |||
| 17:51 (actu | diff) . . (-51) . . Aurelpere (discussion | contributions) (Page créée avec « To limit current amperage of the photovoltaic production, it is useful to use pannels with a higher power which are generally at higher voltage. ») | |||
| 17:51 (actu | diff) . . (+6) . . Aurelpere (discussion | contributions) (Page créée avec « However, the prices of the models get higher when the nominal power they accept gets higher (so it will mainly rely on amperage) ») | |||
| 17:51 (actu | diff) . . (-4) . . Aurelpere (discussion | contributions) (Page créée avec « The charging voltage of reference are 12V,24V and 48V. ») | |||
| 17:51 (actu | diff) . . (-17) . . Aurelpere (discussion | contributions) (Page créée avec « If you connect several pannels and several batteries, it is recommended to have a regulator to stop charging correctly when the battery is fully charged. ») | |||
| 17:51 (actu | diff) . . (-63) . . Aurelpere (discussion | contributions) (Page créée avec « They are made of DC/DC adapter (direct current to direct current) and a circuit breaker. The mppt also includes an impedence adapter (resistance to adapt amperage injected... ») | |||
| 17:51 (actu | diff) . . (-29) . . Aurelpere (discussion | contributions) (Page créée avec « 3 types exist: TOR (Tout ou rien) MPPT (maximum power point tracking) PWM (Pulse Width Modulation) ») | |||
| 17:51 (actu | diff) . . (-55) . . Aurelpere (discussion | contributions) (Page créée avec « The charging regulator (nb: generally inverter said "hybrid", ie with an output for battery and one output for grid, include a charging regulator, mostly mppt, that condit... ») | |||
| 17:51 (actu | diff) . . (-7) . . Aurelpere (discussion | contributions) (Page créée avec « There is an important device to recall to charge correctly your batteries: ») | |||
| 17:51 (actu | diff) . . (-23) . . Aurelpere (discussion | contributions) (Page créée avec « To recharge batteries, in principle, if you connect your pannels directly on a battery, you only need your voltage to be the same as the battery for your pannel charge the... ») | |||
| 17:50 (actu | diff) . . (+41) . . Aurelpere (discussion | contributions) (Page créée avec « -amperage: variable according to the models but generally lower than 10A. See basics recall for addition. You can also make mixed serie/paralelle system to adjust ») | |||
| 17:50 (actu | diff) . . (+49) . . Aurelpere (discussion | contributions) (Page créée avec « -voltage: 12V, 24V or 48V. See basics recall for additions. You can also make a mixed serie/paralell system to adjust voltage ») | |||
| 17:50 (actu | diff) . . (-38) . . Aurelpere (discussion | contributions) (Page créée avec « -peak power: they add up to obtain the necessary power found when sizing production ») | |||
| 17:50 (actu | diff) . . (-9) . . Aurelpere (discussion | contributions) (Page créée avec « You can read the characteristics of your solar pannels you were give or found on second hand website: ») | |||
| 17:50 (actu | diff) . . (+67) . . Aurelpere (discussion | contributions) | |||
| 17:50 (actu | diff) . . (+21) . . Aurelpere (discussion | contributions) | |||
| 17:49 (actu | diff) . . (-18) . . Aurelpere (discussion | contributions) | |||
| 17:49 (actu | diff) . . (-19) . . Aurelpere (discussion | contributions) | |||
| 17:49 (actu | diff) . . (+164) . . Aurelpere (discussion | contributions) | |||
| 17:49 (actu | diff) . . (-79) . . Aurelpere (discussion | contributions) (Page créée avec « The first problematic for lowtech offgrid photovoltaic is sizing ») | |||
| 17:49 (actu | diff) . . (-58) . . Aurelpere (discussion | contributions) (Page créée avec « same for batteries: to keep in paralell to keep same voltage ») | |||
| 17:49 (actu | diff) . . (-23) . . Aurelpere (discussion | contributions) (Page créée avec « plugging in paralell (+ on + and - on -): we add amperage and we keep same voltage ») | |||
| 17:49 (actu | diff) . . (-6) . . Aurelpere (discussion | contributions) (Page créée avec « plugging in serie (+ on - and + on -): we add voltage and we keep same amperage ») | |||
| 17:48 (actu | diff) . . (-188) . . Aurelpere (discussion | contributions) (Page créée avec « Basics recall: ») | |||
| 17:48 (actu | diff) . . (-20) . . Aurelpere (discussion | contributions) (Page créée avec « Regulation sizing ») | |||
| 17:48 (actu | diff) . . (-136) . . Aurelpere (discussion | contributions) (Page créée avec « We can here talk about more or less conservative hypothesis, ie hypothesis more or less "careful", in order for the battries to be always charged in winter. We notice that... ») | |||
| 17:48 (actu | diff) . . (-17) . . Aurelpere (discussion | contributions) (Page créée avec « We notice that the reference ines data for production of 1kWc in december corresponds to 1kWc===1kWh approximately (https://autocalsol.ines-solaire.org/etude/localisation/... ») | |||
| 17:48 (actu | diff) . . (-6) . . Aurelpere (discussion | contributions) (Page créée avec « 2. When sizing on a mean day, 1kWc produces on average 1,99kWh per day, so a production need of 10kWh/1,99=5kWc ») | |||
| 17:48 (actu | diff) . . (-47) . . Aurelpere (discussion | contributions) (Page créée avec « 1. When sizing on the mean 1kWh interval : 1kWc produces on average 1kWh in 1,35d, so 0,74kWh scaled to a 1 day interval, so a sized production of 10kWh/0,74=13,5kWc When... ») | |||
| 17:48 (actu | diff) . . (-2) . . Aurelpere (discussion | contributions) (Page créée avec « mean number of consecutive days for 1kWc to produce 3kWh: 2.263157894736842d ») | |||
| 17:48 (actu | diff) . . (+1) . . Aurelpere (discussion | contributions) (Page créée avec « number of occurences: 1 ») | |||
| 17:48 (actu | diff) . . (-1) . . Aurelpere (discussion | contributions) (Page créée avec « Maximum number of consecutive days for 1kWc to produce 3kWh: 7d ») | |||
| 17:48 (actu | diff) . . (-2) . . Aurelpere (discussion | contributions) (Page créée avec « mean number of consecutive days for 1kWc to produce 2kWh: 1.8022598870056497d ») | |||
| 17:48 (actu | diff) . . (+1) . . Aurelpere (discussion | contributions) (Page créée avec « number of occurences: 3 ») | |||
| 17:48 (actu | diff) . . (-1) . . Aurelpere (discussion | contributions) (Page créée avec « Maximum number of consecutive days for 1kWc to produce 2kWh: 5d ») | |||
| 17:48 (actu | diff) . . (-2) . . Aurelpere (discussion | contributions) (Page créée avec « mean number of consecutive days for 1kWc to produce 1kWh: 1.3539192399049882d ») | |||
| 17:48 (actu | diff) . . (+1) . . Aurelpere (discussion | contributions) (Page créée avec « number of occurences: 1 ») | |||
| 17:48 (actu | diff) . . (-1) . . Aurelpere (discussion | contributions) (Page créée avec « Maximum number of consecutive days for 1kWc to produce 1kWh: 4d ») | |||
| 17:47 (actu | diff) . . (-10) . . Aurelpere (discussion | contributions) (Page créée avec « Mean daily production in january and december:1.9924362701612903 kWh ») | |||
| 17:47 (actu | diff) . . (-7) . . Aurelpere (discussion | contributions) (Page créée avec « In our case, we get: ») | |||
| 17:47 (actu | diff) . . (-2) . . Aurelpere (discussion | contributions) | |||
| 17:47 (actu | diff) . . (-6) . . Aurelpere (discussion | contributions) (Page créée avec « max_streak = 0 current_streak = 0 current_sum=0 target=3000 streaks=[] for value in dec_jan_data['P']: if current_sum <= target: current_sum+=value cur... ») | |||
| 17:47 (actu | diff) . . (-8) . . Aurelpere (discussion | contributions) (Page créée avec « max_streak = 0 current_streak = 0 current_sum=0 target=2000 streaks=[] for value in dec_jan_data['P']: if current_sum <= target: current_sum+=value cur... ») | |||
| 17:46 (actu | diff) . . (-12) . . Aurelpere (discussion | contributions) (Page créée avec « For example 80% for lithium ion batteries. ») | |||
| 17:46 (actu | diff) . . (-20) . . Aurelpere (discussion | contributions) (Page créée avec « to avoid a costly oversizing for vey seldom occasions ») | |||
| 17:46 (actu | diff) . . (-44) . . Aurelpere (discussion | contributions) (Page créée avec « -either oversize the storage to hold 1 to 2d to and have a fossil fuel generator on the side: 5 to 10kWh of batteries for 4kWh needs ») | |||
| 17:46 (actu | diff) . . (-22) . . Aurelpere (discussion | contributions) (Page créée avec « -either oversize the storage to hold 4d needs to face these seldom very low sunlight episodes : 20kWh of batteries for 4kWh needs ») | |||
| 17:46 (actu | diff) . . (+2) . . Aurelpere (discussion | contributions) (Page créée avec « We then have a choice: ») | |||
| 17:43 (actu | diff) . . (-18) . . Aurelpere (discussion | contributions) (Page créée avec « <pre> import pandas as pd df = pd.read_csv('output.csv', skiprows=10, skipfooter=11, sep=',', engine='python') df['time']=df['time'].astype(str) df['time']=pd.to_datetime(... ») | |||
| 17:40 (actu | diff) . . (-56) . . Aurelpere (discussion | contributions) (Page créée avec « We will reuse the previous piece of code and adapt it to find the same stats as before but only in december and january. ») | |||
| 17:40 (actu | diff) . . (-65) . . Aurelpere (discussion | contributions) (Page créée avec « We notice sizing based on winter months allow to produce enough to provide with electri needs all year long, but imply an overproduction in summer that would be useful to... ») | |||
| 17:40 (actu | diff) . . (-118) . . Aurelpere (discussion | contributions) (Page créée avec « We can size production several ways: 1. So as batteries are entirely charged on an mean interval in december/january (sunless months of the year) 2.So as batteries are ent... ») | |||
| 17:40 (actu | diff) . . (-17) . . Aurelpere (discussion | contributions) (Page créée avec « We suppose we size the batteries at 10kWh for 4kWh needs -so 2d of autonomy- ») | |||
| 17:40 (actu | diff) . . (-9) . . Aurelpere (discussion | contributions) (Page créée avec « Production sizing ») | |||
| 17:40 (actu | diff) . . (-9) . . Aurelpere (discussion | contributions) (Page créée avec « but we can find some on aliexpress (see photos for references). ») | |||
| 17:40 (actu | diff) . . (+11) . . Aurelpere (discussion | contributions) (Page créée avec « It is still difficul to get away with BMS (Battery management system) for security norms, ») | |||
| 17:40 (actu | diff) . . (+19) . . Aurelpere (discussion | contributions) (Page créée avec « In may 2024, we can get 14kWh for 3k€ with thise kind of reuse. ») | |||
| 17:40 (actu | diff) . . (-33) . . Aurelpere (discussion | contributions) (Page créée avec « See photos from a lowtech workshop at astrolab for lithium ion car battery reuse. ») | |||
| 17:40 (actu | diff) . . (-33) . . Aurelpere (discussion | contributions) (Page créée avec « is still to reuse car batteries. ») | |||
| 17:40 (actu | diff) . . (-18) . . Aurelpere (discussion | contributions) (Page créée avec « If you want to size your storage "at scale" after you have reduced your electric needs, the best ») | |||
| 17:40 (actu | diff) . . (-6) . . Aurelpere (discussion | contributions) (Page créée avec « We are in may 2024, et we just leave the informal industrial consensus of 1€/Wh for high performance batteries. ») | |||
| 17:39 (actu | diff) . . (-42) . . Aurelpere (discussion | contributions) (Page créée avec « -(or also play on the production side with oversizing production -a produced kWh is much cheaper than a stored kWh in 2024- in the next stage to fully charge the batteries... ») | |||
| 17:39 (actu | diff) . . (-22) . . Aurelpere (discussion | contributions) (Page créée avec « cope wihtout electricity when there ar long episodes without sun: 5 to 10kWh of batteries for 4kWh needs ») | |||
| 17:39 (actu | diff) . . (-25) . . Aurelpere (discussion | contributions) (Page créée avec « -either, if criticity of needs is not too high, size the storage to hold 1 to 2d and ») | |||
| 17:39 (actu | diff) . . (-20) . . Aurelpere (discussion | contributions) (Page créée avec « And finally that the mean number of days for 1kWc to produce 1kWh to 3kWh varies from 1 to 1,5d ») | |||
| 17:39 (actu | diff) . . (-16) . . Aurelpere (discussion | contributions) (Page créée avec « use empirical data using my other tutorial here : Mesure de l'ensoleillement-luminosité avec un ordinateur monocarte (raspberry-orangepi) ) ») | |||
| 17:39 (actu | diff) . . (-26) . . Aurelpere (discussion | contributions) (Page créée avec « that solar pannels produce more that the jrc modelised data give us, i encourage you to ») | |||
| 17:39 (actu | diff) . . (-7) . . Aurelpere (discussion | contributions) (Page créée avec « (if you are not entirely satisfied with the modelised data considered your experience of photovoltai production based on your experience of the weather, and my hypothesis is ») | |||
| 17:39 (actu | diff) . . (-20) . . Aurelpere (discussion | contributions) (Page créée avec « But alos that the number of occurences are relatively low: 1 to 3 occurences only of these episodes with very few sunlight and production in 15 years. ») | |||
| 17:39 (actu | diff) . . (-14) . . Aurelpere (discussion | contributions) (Page créée avec « That the maximum number of days with a low sunlight vary from 4 to 7d based on the level of sunlight hoped ») | |||
| 17:39 (actu | diff) . . (+5) . . Aurelpere (discussion | contributions) (Page créée avec « <br><br> What are these numbers telling us? ») | |||
| 17:38 (actu | diff) . . (-2) . . Aurelpere (discussion | contributions) (Page créée avec « mean number of consecutive days for 1kWc to produce 3kWh: 1.4647827920708563d ») | |||
| 17:38 (actu | diff) . . (+2) . . Aurelpere (discussion | contributions) (Page créée avec « number of occurences : 1 ») | |||
| 17:38 (actu | diff) . . (-1) . . Aurelpere (discussion | contributions) (Page créée avec « maximum number of consecutive days for 1kWc to produce 3kWh: 7d ») | |||
| 17:38 (actu | diff) . . (-2) . . Aurelpere (discussion | contributions) (Page créée avec « mean number of consecutive days for 1kWc to produce 2kWh: 1.2801404603979711d ») | |||
| 17:38 (actu | diff) . . (+2) . . Aurelpere (discussion | contributions) (Page créée avec « number of occurences : 3 ») | |||
| 17:38 (actu | diff) . . (-1) . . Aurelpere (discussion | contributions) (Page créée avec « maximum number of consecutive days for 1kWc to produce 2kWh: 5d ») | |||
| 17:38 (actu | diff) . . (-2) . . Aurelpere (discussion | contributions) (Page créée avec « mean number of consecutive days for 1kWc to produce 1kWh: 1.1124367317425885d ») | |||
| 17:38 (actu | diff) . . (+2) . . Aurelpere (discussion | contributions) (Page créée avec « number of occurences : 1 ») | |||
| 17:38 (actu | diff) . . (+1) . . Aurelpere (discussion | contributions) | |||
| 17:38 (actu | diff) . . (+1) . . Aurelpere (discussion | contributions) | |||
| 17:37 (actu | diff) . . (-1) . . Aurelpere (discussion | contributions) (Page créée avec « maximum number of consecutive days for 1kWc to produce 1kWh: 4d ») | |||
| 17:37 (actu | diff) . . (-7) . . Aurelpere (discussion | contributions) (Page créée avec « In our case, we get: ») | |||
| 17:37 (actu | diff) . . (-9) . . Aurelpere (discussion | contributions) (Page créée avec « max_streak = 0 current_streak = 0 current_sum=0 target=3000 streaks=[] for value in daily_data['P']: if current_sum <= target: current_sum+=value curre... ») | |||
| 17:36 (actu | diff) . . (-9) . . Aurelpere (discussion | contributions) (Page créée avec « max_streak = 0 current_streak = 0 current_sum=0 target=2000 streaks=[] for value in daily_data['P']: if current_sum <= target: current_sum+=value curre... ») | |||
| 17:35 (actu | diff) . . (-9) . . Aurelpere (discussion | contributions) (Page créée avec « max_streak = 0 current_streak = 0 current_sum=0 target=1000 streaks=[] for value in daily_data['P']: if current_sum <= target: current_sum+=value curre... ») | |||
| 17:34 (actu | diff) . . (-6) . . Aurelpere (discussion | contributions) (Page créée avec « We then use a piece of python/pandas code to obtain the maximum number of consecutive days for 1kWc to produce respectively 1kWh, 2kWh and 3kWh ») | |||
| 17:34 (actu | diff) . . (-3) . . Aurelpere (discussion | contributions) (Page créée avec « peakpower= corresponds to the photovoltaic power in kWc (here 1kWc) ») | |||
| 17:34 (actu | diff) . . (-10) . . Aurelpere (discussion | contributions) (Page créée avec « startyear= and endyear= are the time limits of the considered period (here 15 years between 2005 and 2020) ») | |||
| 17:34 (actu | diff) . . (-28) . . Aurelpere (discussion | contributions) (Page créée avec « The parameters lat= and lon= allow to adjust latitude and longitude ») | |||
| 17:34 (actu | diff) . . (-21) . . Aurelpere (discussion | contributions) (Page créée avec « <pre> wget --max-redirect=10 -O output.csv "<nowiki>https://re.jrc.ec.europa.eu/api/v5_2/seriescalc?lat=44.203142&lon=0.616363&loss=14&angle=45&aspect=0&startyear=2005&end... ») | |||
| 17:33 (actu | diff) . . (-9) . . Aurelpere (discussion | contributions) (Page créée avec « Edit 27/02: after verification, the date comes from horary satellites photos, so empirical data as an input in particular for the clouds, but the hypothesis of the model r... ») | |||
| 17:33 (actu | diff) . . (-3) . . Aurelpere (discussion | contributions) (Page créée avec « either use the downloadable data from european jrc modelisation pvgis which are the reference data in the industry (warning, it is a modelisation, ») | |||
| 17:33 (actu | diff) . . (-1) . . Aurelpere (discussion | contributions) (Page créée avec « my other tutorial here Mesure de l'ensoleillement-luminosité avec un ordinateur monocarte (raspberry-orangepi), ») | |||
| 17:33 (actu | diff) . . (-20) . . Aurelpere (discussion | contributions) (Page créée avec « To find the maximum number off days without sun, you can either measure yourself the sunlight (see ») | |||
| 17:33 (actu | diff) . . (-25) . . Aurelpere (discussion | contributions) (Page créée avec « seek to know how many days without sun the storage must hold your maximum daily needs ») | |||
| 17:33 (actu | diff) . . (-23) . . Aurelpere (discussion | contributions) (Page créée avec « To size the storage correctly based on the maximum daily need, we will then ») | |||
| 17:33 (actu | diff) . . (+20) . . Aurelpere (discussion | contributions) | |||
| 17:33 (actu | diff) . . (-35) . . Aurelpere (discussion | contributions) (Page créée avec « expressed in kWh, simply divide the Wh by the storage voltage. ») | |||
| 17:33 (actu | diff) . . (-21) . . Aurelpere (discussion | contributions) (Page créée avec « NB: the battery capacities are often expressed in Ah. To obtain the Ah from the capacity ») | |||
| 17:32 (actu | diff) . . (+7) . . Aurelpere (discussion | contributions) (Page créée avec « We take the maximum discharge percentage accepted by the batteries based on its storage technology. ») | |||
| 17:32 (actu | diff) . . (-6) . . Aurelpere (discussion | contributions) (Page créée avec « Exemple: (daily needs)/(max discharge percentage)=(4)/(0,8)=5kWh ») | |||
| 17:31 (actu | diff) . . (-7) . . Aurelpere (discussion | contributions) (Page créée avec « Example: daily need of 4kWh ») | |||
| 17:31 (actu | diff) . . (-12) . . Aurelpere (discussion | contributions) (Page créée avec « the consumption imply we size the storage based on the maximul daily need. ») | |||
| 17:31 (actu | diff) . . (-17) . . Aurelpere (discussion | contributions) (Page créée avec « but in most cases, the daily production variations and the horary difference between the production and ») | |||
| 17:31 (actu | diff) . . (-27) . . Aurelpere (discussion | contributions) (Page créée avec « This consideration can be important if you have an electric consumption important by day (when the pannels produce) ») | |||
| 17:31 (actu | diff) . . (+11) . . Aurelpere (discussion | contributions) (Page créée avec « and the storage batteries, they will go to power the electric device. ») | |||
| 17:31 (actu | diff) . . (-28) . . Aurelpere (discussion | contributions) (Page créée avec « to less resistance. Thus, if the electrons must "choose" between a running electric device ») | |||
| 17:31 (actu | diff) . . (+6) . . Aurelpere (discussion | contributions) (Page créée avec « Offgrid, the path the electrons take after the photovoltaic pannels have made them move is the path that go ») | |||
| 17:31 (actu | diff) . . (-10) . . Aurelpere (discussion | contributions) (Page créée avec « Storage sizing ») | |||
| 17:31 (actu | diff) . . (-20) . . Aurelpere (discussion | contributions) (Page créée avec « you dont want to measure) ») | |||
| 17:31 (actu | diff) . . (-13) . . Aurelpere (discussion | contributions) (Page créée avec « of every electrical device (the simpler is to remove the electric fuse of all devices ») | |||
| 17:31 (actu | diff) . . (-26) . . Aurelpere (discussion | contributions) (Page créée avec « Thus, you can measure your daily consumption but alos the horary consumption ») | |||
| 17:31 (actu | diff) . . (-19) . . Aurelpere (discussion | contributions) (Page créée avec « To measure your consumption, you can use your electric meter. ») | |||
| 17:30 (actu | diff) . . (-40) . . Aurelpere (discussion | contributions) (Page créée avec « (order of magnitude) ») | |||
| 17:30 (actu | diff) . . (+14) . . Aurelpere (discussion | contributions) (Page créée avec « NB: for a shower of 10min at 40°C, you approximately need 3kWh, so approximately the biomethane generated daily by 100 hen's poo ») | |||
| 17:30 (actu | diff) . . (-3) . . Aurelpere (discussion | contributions) (Page créée avec « how to switch to a thermic solar source of energy and /or heat up with wood or biogaz) ») | |||
| 17:30 (actu | diff) . . (-38) . . Aurelpere (discussion | contributions) (Page créée avec « adequate for a non fossil production (we can usefully wonder ») | |||
| 17:30 (actu | diff) . . (-4) . . Aurelpere (discussion | contributions) (Page créée avec « and that can question the relevant source of energy to heat up your water or the number of showers ») | |||
| 17:30 (actu | diff) . . (-16) . . Aurelpere (discussion | contributions) (Page créée avec « which are relatively linear to the number of hot showers you take ») | |||
| 17:30 (actu | diff) . . (-19) . . Aurelpere (discussion | contributions) (Page créée avec « Another example is the water heater that consumes consequent quantities of energy ») | |||
| 17:30 (actu | diff) . . (-25) . . Aurelpere (discussion | contributions) (Page créée avec « with electric heater if your main source of energy is photovoltaic. ») | |||
| 17:30 (actu | diff) . . (-11) . . Aurelpere (discussion | contributions) (Page créée avec « but also to think how to reduce your consumption. For example, it is absurd to heat up ») | |||
| 17:30 (actu | diff) . . (-12) . . Aurelpere (discussion | contributions) (Page créée avec « This exercise is not only interesting for sizing adequately the production, ») | |||
| 17:30 (actu | diff) . . (+11) . . Aurelpere (discussion | contributions) (Page créée avec « according to day time) and seasonal variations (consumption in winter and in summer for example). ») | |||
| 17:30 (actu | diff) . . (-7) . . Aurelpere (discussion | contributions) (Page créée avec « mean consumption on the one hand, but also daily variations (consumtion variations ») | |||
| 17:30 (actu | diff) . . (-8) . . Aurelpere (discussion | contributions) (Page créée avec « To do that, we need to take into account the correct temporal scales: ») | |||
| 17:30 (actu | diff) . . (-20) . . Aurelpere (discussion | contributions) (Page créée avec « Firstly we need to estimate your electric consumption ») | |||
| 17:30 (actu | diff) . . (-4) . . Aurelpere (discussion | contributions) (Page créée avec « Needs evaluation ») | |||
| 17:30 (actu | diff) . . (0) . . Aurelpere (discussion | contributions) (Page créée avec « Interactive web demo here: ») | |||
| 17:29 (actu | diff) . . (-5) . . Aurelpere (discussion | contributions) (Page créée avec « to have seldom blackout episodes. ») | |||
| 17:29 (actu | diff) . . (-6) . . Aurelpere (discussion | contributions) (Page créée avec « perspective and avoiding oversizing when it is possible ») | |||
| 17:29 (actu | diff) . . (-18) . . Aurelpere (discussion | contributions) (Page créée avec « to size more precisely to be in a low tech ») | |||
| 17:29 (actu | diff) . . (+6) . . Aurelpere (discussion | contributions) (Page créée avec « waste, and that would still be interesting to have this piece of logic ») | |||
| 17:29 (actu | diff) . . (-20) . . Aurelpere (discussion | contributions) (Page créée avec « Any way, used batteries produce quite a few ») | |||
| 17:28 (actu | diff) . . (-4) . . Aurelpere (discussion | contributions) (Page créée avec « the petro dollar system, so we have probably time to see it coming ;) ») | |||
| 17:28 (actu | diff) . . (-16) . . Aurelpere (discussion | contributions) (Page créée avec « But a storage a very low cost would dramatically challenge ») | |||
| 17:28 (actu | diff) . . (-1) . . Aurelpere (discussion | contributions) (Page créée avec « to come. ») | |||
| 17:28 (actu | diff) . . (-20) . . Aurelpere (discussion | contributions) (Page créée avec « be less economically relevant in the years ») | |||
| 17:28 (actu | diff) . . (+5) . . Aurelpere (discussion | contributions) (Page créée avec « to fine tune sizing at the lower cost storage will probably ») | |||
| 17:28 (actu | diff) . . (-5) . . Aurelpere (discussion | contributions) (Page créée avec « in the forthcoming years and the optimizing algorithm ») | |||
| 17:28 (actu | diff) . . (-8) . . Aurelpere (discussion | contributions) (Page créée avec « that we end up with very low elecricity storage costs ») | |||
| 17:28 (actu | diff) . . (-15) . . Aurelpere (discussion | contributions) (Page créée avec « geopolitical evolutions in the brics, it is likely ») | |||
| 17:28 (actu | diff) . . (-9) . . Aurelpere (discussion | contributions) (Page créée avec « electricity storage these past 15 years, and considered ») | |||
| 17:28 (actu | diff) . . (-10) . . Aurelpere (discussion | contributions) (Page créée avec « Considered the number of patents declared in the ») | |||
| 17:28 (actu | diff) . . (-16) . . Aurelpere (discussion | contributions) (Page créée avec « less costly in storage capacity (still expensive in 2024). ») | |||
| 17:28 (actu | diff) . . (-13) . . Aurelpere (discussion | contributions) (Page créée avec « less "meaned", and allows to test the sizing chosen ») | |||
| 17:27 (actu | diff) . . (-14) . . Aurelpere (discussion | contributions) (Page créée avec « with day-to-day winter productions hypothesis, ») | |||
| 17:27 (actu | diff) . . (-8) . . Aurelpere (discussion | contributions) (Page créée avec « This tutorial allows therefore to size by "data-testing", ie ») | |||
| 17:27 (actu | diff) . . (+5) . . Aurelpere (discussion | contributions) (Page créée avec « of blackout based on the sizing chosen. ») | |||
| 17:27 (actu | diff) . . (-2) . . Aurelpere (discussion | contributions) (Page créée avec « In addition, we do not have possibility to "data-test" the number of days ») | |||
| 17:27 (actu | diff) . . (0) . . Aurelpere (discussion | contributions) (Page créée avec « for the first link et we only have mean average for the second link. ») | |||
| 17:27 (actu | diff) . . (-8) . . Aurelpere (discussion | contributions) (Page créée avec « However, the hypothesis are 1kWc produces 1kWh in winter ») | |||
| 17:27 (actu | diff) . . (+2) . . Aurelpere (discussion | contributions) (Page créée avec « and here: ») |
| 17:44 | (Journal des créations de comptes utilisateur) . . Le compte de l’utilisateur CGPLynn99190 (discussion | contributions) a été créé |
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