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Questions tagged [solar-energy]

Use for questions about non-photovoltaic solar energy applications, such as passive solar heating or concentrated solar thermal power. For PV applications, use the photovoltaics tag instead.

0
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1answer
27 views

Electronics confusion

I want to build my own off-grid system but confused with what sizes (V, I) to get. I want to run a 24v system powering 4.4kWh/day. I have 4 hours of usable sunlight a day and space for panels and ...
0
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1answer
27 views

Solar Thermal heat gain formula converted to CO2e and trees saved

We have invented a solar thermal heating system with interseasonal storage, recently patented. I want to display the trees saved and carbon offset on the control display based on temperatures coming ...
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4answers
61 views

Is it practical to make a solar furnace for small scale metal production?

Solar furnaces using mirrors to concentrate sunlight on a small area do not produce much power - perhaps 1kW per square metre of mirror - but can reach very high temperatures. From the earliest ...
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0answers
19 views

How can I make MPPT charge controller with database to get information about changing irradiance levels and the best V for each state

New to programming, I'm working on an MPPT project. I want to use the P&O algorithm but the issue of instability bothers me. I believe if the controller can be made smart, it'll be able to pick ...
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2answers
29 views

Did a RTC solar tracker need any photosensor?

I planned to do a solar tracker for my project and I am going to make a RTC solar tracker(actually still considering). So, do I still need photosensor like LDR for tracking the sun?
4
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2answers
94 views

Solving heat loss equation associated with solar trough concentrators

My project is about finding the efficiency of solar trough (cylindrical parabola) concentrator that will boil water in a pipe located at the focus (check picture please). In the process of doing so (...
4
votes
1answer
46 views

Is it better to heat a heat pump evaporator or the load directly?

I have a heat pump which moves heat from outside to inside. I also have a solar heating array that collects radiant heat from the sun. Given that my goal is to heat the inside (with minimal energy ...
0
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0answers
385 views

TP4056 alternative with 2A charging current

all. I am searching for an alternative to TP4056 that would be capable of 2A charging current. I have a set of 18650 batteries in parallel that power a wireless device. To charge them, I use 6V solar ...
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0answers
27 views

Solar microinverter in parallel with sine wave inverter

A solar micro inverter operates as long as the grid is available. I am looking for a solution to power up my house when the grid is down but the sun shines. If I connect a pure-sine wave inverter in ...
2
votes
1answer
144 views

CUF v/s PLF of power plants

What is the difference between capacity use factor (CUF) of solar power plant and plant load factor (PLF) of coal based power plant? Can we compare both since they seem analogous?
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0answers
23 views

Charging a Li-po battery (battery output current)

I would like to design a buck converter to use a PV panel to charge a 11.1V 3000mAh 3S 30C Lipo battery. I want to choose the minimum inductance for a CCM ($L=\dfrac{V_{out}T_s}{2I_{out}}$), what is ...
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2answers
85 views

Why not skip inverters and use solar power directly as dc?

To maximize efficiency and reduce cost I am contemplating using the power from solar cells directly as dc without conversion to ac. I plan to wire and connect the solar panels in series and parallel ...
2
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1answer
163 views

Design of Compound Elliptical Concentrator and Compound Parabolic Concentrator

What is the process in design a Compound Elliptical Concentrator and Compound Parabolic Concentrator if I wanted to achieve 100% optimal concentration ? Let's assume random numbers of: A light source ...
5
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2answers
408 views

Can solar panels absorb heat for energy?

Solar panels can absorb sunlight and use it for energy, but can they absorb the heat that is generated from their use and use the heat for energy?
1
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2answers
51 views

What material (preferably relatively inexpensive), can I use for absorber in a fresnel solar concentrator

I am thinking of building a prototype for a solar generator using a fresnel lens to concentrate sun rays to a relatively small area, for the purpose of harnessing the thermal energy. The problem ...
1
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2answers
72 views

How to extract solar energy from a wall?

I have a vertical wall which faces the sun (North in my case as I am in New Zealand) and it gets hot in Summer.I should like to take some of that heat and transfer it into a nearby swimming pool as it ...
1
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1answer
71 views

Thermodynamics of an Arctic Greenhouse

QUESTION For a business project, I'm looking into the viability of a greenhouse situated in Canada's far northern town of Iqaluit. The problem is how to mathematically simulate the internal air ...
-1
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1answer
38 views

What tools to use for a solar powered backup? [closed]

Recently, we experienced complete outages for around 8 hours, due to construction on a nearby road. We have decided to install a backup battery and solar array to prevent this from happening in the ...
2
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1answer
38 views

What happens if current provided to mono phase motor is less than rated power

I have a 0.5 kW single-phase AC motor. What happens if the supply is 220 V but can't supply the full current needed? Will the motor torque be lower? Or will it be slower? Will it be any ...
0
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1answer
160 views

Surface in the sun vs. surface in the shade [closed]

What is the difference in temperature between a surface in the sun as supposed to one in the shade and how is it calculated? For instance: What will the temperature be if a metal sheet lies in the ...
0
votes
1answer
47 views

Daylighting, how to improve coverage

I am doing this daylighting project for which we must bring the light far down into a bunker. I have found . I have heard and read that the quantity of light that you bring in a cable decreases, 60% ...
6
votes
2answers
137 views

Did I wire these solar panels correctly?

recently I bought 3 solar panels rated at 5V 200 mA each. I want to use them to charge a 5V battery bank to charge a phone. Thinking about the proper way to put them, I thought i can connect all in ...
11
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7answers
3k views

What are the disadvantages of concentrated solar thermal power?

Concentrated solar power looks on the surface to be an excellent source of grid power. It's sustainable, has no obvious waste products to deal with either during construction or operation, and with ...
12
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4answers
3k views

Will more electricity be generated by using a lens to focus sunlight onto solar cells?

I have been wondering about this question for quite some time. Assuming an ideal case, the energy from photons hitting solar cells is converted into electric energy as described by the equation: $RI^...
4
votes
1answer
179 views

Is it possible to modify a home gutter to absorb sufficient solar energy to melt ice?

This is related to the question Will dark gutters stay ice free better than light colored gutters? The current consensus seems to be that the mass of the gutters and limited light may make simply ...