Questions tagged [energy]
Energy is defined as the amount of work that can be performed by a force, measured in joules (J). Energy is power integrated over time; power (W) is energy per second (J/s). This is a poor tag to use. Please consider if your question relates to energy as defined in physics; don't use it as a synonym for power or capacity.
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Does a parallel air gap increase or decrease maximum energy stored in magnetic field of an inductor?
I understand that a serial air gap increases the amount of energy that can be stored in an inductor.
The reasoning is as follows: according to Gauss's law for magnetism, divergence of B-field is zero. ...
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Microwave oven approximate efficiency [duplicate]
I just made popcorn in the microwave and I wonder how much energy my popcorn absorbed and how much energy was consumed by oven. It was 90g of corn and butter (kind of...) and it needed 800W for 3 ...
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Big differences between AC and DC measurements
I am conducting some electricity measurements with Tinkerforge. To be more precise, I am measuring the energy consumption of a RPi 4, and for that I use two Tinkerforge bricklets.
The first one, ...
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Is this method of proving energy is conserved in an LC oscillator correct?
Assuming no energy loss due to heat or EM waves
$$U=\frac{Q^2}{2C} +\frac{LI^2}{2}$$
differentiating both sides with respect to time,
$$\frac{dU}{dt}=\frac{QdQ}{Cdt}+IL\frac{dI}{dT}$$
but we know that ...
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Power loss in a capacitor vs inductor
Is there are a general rule of thumb if one of these stores energy more efficiently than the other?
When properties are approximateily comparable, are energy losses bigger with a coil or with a ...
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When calculating the energy delivered by a pulse in an oscilloscope, what is the uncertainty in the timestep increment? [duplicate]
I am trying to calculate the energy delivered by a short electrical pulse. I am using an oscilloscope to capture the waveform and then exporting it to a CSV file. My scope took measurements at a rate ...
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How do I convert generated cooling capacity in kW to kWh?
I have to program a relatively simple program so I can display values on dashboard representing the part kWh a system is responsible for generating. This will be represented as a percentage.
I have a ...
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Alternatives for batteries for energy storage [closed]
If it is not the indicated Stack App, let me know, please. I don't really know if this topic is about chemical stuff because of batteries composition or just a electronic energy problem.
I've been ...
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Why does air conditioner power draw fluctuate during the day?
My air conditioner is controlled by a thermostat like most are. When the set temperature is exceeded, the system turns on the air conditioner using the R and Y wires of the controller. As I ...
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Identify chip labelled SC1186E
I am trying to identify the manufacturer and function of, and hopefully locate a data sheet for, this chip labelled SC1186E. It is in a three-phase power meter, so my guess is, that it is an ADC front ...
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Confused about MW to MWh conversion
I have various datasets of energy production in MW.
I need to present everything in MWh. I need to know if my data is already by the hour (logging a value for each hour of each day of an entire year), ...
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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 ...
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Calculate the power consumption
I have project put the ESP32-S2 in active mode for 10 second and then go to modem-sleep mode. I want to compute the power consumption for the active mode. According to this, the ESP32-S2 current ...
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Matching generation and consumption in renewables
To balance power generation and consumption, traditional power plants such as thermal and hydro have governors that regulate the steam/water that flows into the turbine.
The energy that renewables ...
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Which topology should I use for energy harvesting
I am making a energy harvester design but am confused which of the following circuit should I use to amplify and filter my harvested voltage. The first topology is the synchronous switch harvesting on ...
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