Use of solar energy directly for household needs (without converting into electricity) Student: Ophir Arad
The system is a non-electric solar harvesting and storing system.
its componentes is the solar harvsting systems, any heat extraction method, and heat storing methods.
the product is usable non electric energy, and its 'by products' or 'using compomemts' are the way of usage of the non electric energy.
Operational Effectiveness – OE
Effective
Ineffective
OE 1.55
Operational Perfectness - OP
Basic functions
Components
Supersystems
OP 0.21
PVT system | 10 8 |
Thermal exchange unit
(convection system) | 10 |
PV modules | 4 10 |
Solar Thermal collector | 4 |
Thermal Storage System
(residential or district) | 4 |
Batteries
(Li-ion and such) | 2.7 |
residential heating/cooling -
heat pumps or district heating | No impact |
activation of the condenser
unit of an AC/heat pump
with steam | No impact |
more efficient and cheap energy usage,
avoiding energy curtailment,
decreasing the load and dependency on the electricity grid | No impact |
it seems that PVT is the ultimate residential energy harvesting system because of its functionality to charge several systems, or use the energy directly, and the positive coexistence of the system's elements (PV and heat extractionwhich both contribute to eachothers efficiency).
The system is the household system. it contains many sub-systems - which are the appliances used in a daily basis in the house.
most of those subsystems are powered by electricity.
but some of them could be powered by other sources such as heat, steam, light or hydrogen.
all of these sources could be attained from the solar energy, directly or after a conversion process.
in this brainstorming i will try to think about innovative ways to use the heating of the sun.
4
3
2
1
0
If | Concentrated Solar Power systems would be built for each home |
|---|---|
Then | each houshold would have the abilitiy to harvest solar generated heat |
But | those systems requires lots of space and they are expensive. they are more afficient and enable better storage when incorporated in large scale with many mirrors so the reciever's temprature would be highest. |
| Option | Rank |
|---|---|
converting solar energy to thermal energy, and storing it with sand "heat battery" | 7 |
converting solar energy to thermal energy, and storing it with brick/rock "heat battery" | 6 |
converting solar energy to thermal energy, and storing it with a tank of phase change metarials (PCM) | 4 |
converting solar energy to thermal energy, and storing it with molten salt tank | 4 |
converting solar energy to watter splitting, and store hydrogen for later use | 4 |
converting solar energy to thermal energy, and storing it with Thermochemical energy storage. | 2 |
converting solar energy to thermal energy, and storing it with hot water tank | 1 |
converting solar energy to thermal energy, and storing it with hot air | 0 |
If | the residential rooftop area would be used for PV systems, there would be more electrical output for a single household. |
|---|---|
Then | there will be more electrical energy input. |
But | theres a possibility of curtailment of the energy harvested in daytimes, and overloading of the electrical grid. |
Anatoly Agulyansky
Very good analysis and solutions. Your idea to transfer a solar light through a glass fiber for lighting within houses is excellent. Many thanks.
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