All Questions
15
questions
0
votes
3
answers
1k
views
How to convert kWh to half hour time series?
I have an energy reading of 50 kWh. The duration of this reading is from 09:00 to 10:30 (or 1.5 hours).
If I want to make a 30-minute time series, how could I convert 50 kWh into 3 half-hourly ...
- 1
0
votes
1
answer
628
views
Convert kWh during a 1 hour period to average 15 min kW output
If I have a photovoltaic system that outputs 100 kWh from 1PM - 2PM on a given day and I am trying to figure out what the average 15 minute kW would be during that time period, would that be equal to ...
- 1
0
votes
1
answer
164
views
How to calculate watt hours gained charging battery?
I need an estimate of how many watt hours a battery has gained after charging to a certain number of volts.
With a 12 V, 50 Ah lead-acid car battery, charged from 12.5 V to 13.0 V, is it as simple as ...
- 11
-1
votes
1
answer
71
views
Energy consumption Calculation
I work for a food processing plant and working on a project that calculates energy consumption. Am having a hard time converting information given by the manufacture to calculate the average kWh. ...
5
votes
2
answers
515
views
Understanding relation between energy use, watts and amps
I'm looking into air conditioners and I've been unable to fully understand the relation between watts, amps and the energy ratings (in this case, the one used in the United States, the yellow Energy ...
- 161
1
vote
2
answers
431
views
Calculating the intensity of an electromagnetic wave
I’m a bit confused when it comes to calculating intensity versus energy of a wave.
If I’m given an electronmagnetic wave with an energy of 1 eV, how do I calculate its intensity ? I know intensity is ...
- 135
0
votes
2
answers
126
views
confused about power rating for washing machine in datasheet
I am interested in purchasing a Primus washing machine but I get confused about the power rating that is recorded in the data sheet (link below). On page 2 of the data sheet, the manufacturer states ...
- 1
0
votes
2
answers
2k
views
Calculating the annual energy consumption for a fridge
I'm looking at a spec sheet for a fridge that I'm interested in buying:http://aegelectrolux.co.za/doc/S53420CNX2/SpecificationSheet.pdf and http://aegelectrolux.co.za/cooling/bottom-freezer-fridges/...
- 103
0
votes
1
answer
970
views
Energy Meter energy calculation from power
I have interfaced a smart energy meter IC (ADE7878) to a microcontroller. The datasheet of the IC can be found here,
http://www.analog.com/media/en/technical-documentation/data-sheets/...
- 39
1
vote
1
answer
758
views
mAh and Wh ratings not matching with voltage of device
I was under the impression that
Wh = Ah * V
I have a 20000mAh battery charging device for my phone but am confused about the information provided by it on the side.
It claims to have a 5V output (3....
- 111
4
votes
1
answer
414
views
Kilowatt Hour Definition
This is a very simple question but something that I'm not able to wrap my head around. This Energy report states generated electricity. But what does "generated killowatthours" mean? I know that can'...
- 429
52
votes
6
answers
87k
views
Does turning a lighbulb on and off repeatedly use more energy than just leaving it on for hours?
Let's say I have a 60W bulb in a lamp in my bedroom. If I kept the lamp on for 2 hours straight but the next day, I switched it on and off 10 times in intervals of 5 minutes. Which scenario would use ...
6
votes
2
answers
105k
views
Confusion between MW and MWh
A 1MW power plant producing power constantly for 24 hours will produce 24 MWh a day. Is that right?
If it is, I don't understand when it says, in http://www.beaconpower.com/files/Flywheel_FR-Fact-...
- 163
2
votes
4
answers
228
views
Looking for a better understanding of a kilowatt hour and trying to size an electricity supplier using it
I am trying to design a fuel cell that can provide enough energy for 1 day's use a maximum capacity but I am having trouble sizing the fuel cell because I need a better understanding of kilowatt hours....
- 301
5
votes
5
answers
1k
views
Cheapest way to dissipate energy (discharge battery)
What is the cheapest way to burn a lot of energy? Say I want to burn 800W (4V, 200A). How should I do that?
Ugly suggestions like: use a pot of water and a cable are welcome :)
It should be easy and ...
- 244