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Evaluation of the concentrating PVT systems MaReCo and Solar8

Pihl, Erik and Thapper, Cecilia LU (2006) In EBD-R--06/13
Abstract
The European solar energy business faces the challenge of developing

more cost-effective solar energy systems and one solution could be using

concentrating hybrid PVT systems. Two such hybrids, the Swedish

systems MaReCo and Solar8, are evaluated in this study.

MaReCo is a fixed concentrating system with a high angle of

acceptance. Solar8 is a new system, which is under development. It is

inspired by MaReCo, but has a lower angle of acceptance, which means

a higher concentration, and is sun tracking. Both systems use water as

cooling agent.

The purpose of this report is to evaluate the geometrical shape and

simulate the electrical and thermal output... (More)
The European solar energy business faces the challenge of developing

more cost-effective solar energy systems and one solution could be using

concentrating hybrid PVT systems. Two such hybrids, the Swedish

systems MaReCo and Solar8, are evaluated in this study.

MaReCo is a fixed concentrating system with a high angle of

acceptance. Solar8 is a new system, which is under development. It is

inspired by MaReCo, but has a lower angle of acceptance, which means

a higher concentration, and is sun tracking. Both systems use water as

cooling agent.

The purpose of this report is to evaluate the geometrical shape and

simulate the electrical and thermal output of Solar8, in order to suggest

improvements to the model. MaReCo has been evaluated in earlier

reports, so the main purpose of the measurements in this project has

been to get a reference to the results on Solar8, using both established

and new measurement devices and techniques. The study is conducted

at Lund Institute of Technology (LTH).

The simulated annual electrical output for a Solar8 system located in

Lund, Sweden, based on the conducted measurements, is 42 kWh.m-

2.yr-1 glazed area. For an ideal model using a PV module with 18%

COP, the output would increase to 59 kWh.m-2.yr-1 glazed area and 813

kWh.m-2.yr-1 PV cell area. The simulated thermal output from the

system is 330 kWh.m-2.yr-1 at 25°C working temperature. If the trough is

instead operated at a working temperature of 50°C, the electric output

would decrease with approximately 11% and the thermal output with

10%.

For Madrid, the simulated thermal output is 681 kWh.m-2.yr-1 glazed

area and the electrical output would be 118 kWh.m-2.yr-1 glazed area and

1607 kWh.m-2.yr-1 cell area respectively, to compare with 257 kWh.m-

2.yr-1 for a fixed flat module. This means that the PV cells deliver 6.3

Evaluation of the concentrating PVT systems MaReCo and Solar8

4

times as much electric energy per area unit. For Lund, the equivalent

value would be 5.4 times, which is due to the lower ratio of direct

radiation in Northern Europe.

The study has shown that there still is much work to be done

concerning the geometric design and the reflector surface, in order to

increase the output. The components should also be made cheaper and

economically more viable, and the producers must prove that they can

meet the challenge of creating stabile, reliable systems with low

demands of maintenance.

Concentrating PVT-systems show a potential to fill a larger share of the

future solar energy market. They offer the possibility of lowering the

costs, at the same time as they have less impact on the environment

than flat PV-systems. With several European countries giving subsidies

to solar energy, the possibility to introduce this new solar technology to

the market is presently good. (Less)
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in
EBD-R--06/13
pages
142 pages
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[Publisher information missing]
ISBN
91-85147-18-4
language
English
LU publication?
yes
id
627753ed-7afb-4e80-8d59-be609e40304b (old id 1027919)
date added to LUP
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@misc{627753ed-7afb-4e80-8d59-be609e40304b,
  abstract     = {The European solar energy business faces the challenge of developing<br/><br>
more cost-effective solar energy systems and one solution could be using<br/><br>
concentrating hybrid PVT systems. Two such hybrids, the Swedish<br/><br>
systems MaReCo and Solar8, are evaluated in this study.<br/><br>
MaReCo is a fixed concentrating system with a high angle of<br/><br>
acceptance. Solar8 is a new system, which is under development. It is<br/><br>
inspired by MaReCo, but has a lower angle of acceptance, which means<br/><br>
a higher concentration, and is sun tracking. Both systems use water as<br/><br>
cooling agent.<br/><br>
The purpose of this report is to evaluate the geometrical shape and<br/><br>
simulate the electrical and thermal output of Solar8, in order to suggest<br/><br>
improvements to the model. MaReCo has been evaluated in earlier<br/><br>
reports, so the main purpose of the measurements in this project has<br/><br>
been to get a reference to the results on Solar8, using both established<br/><br>
and new measurement devices and techniques. The study is conducted<br/><br>
at Lund Institute of Technology (LTH).<br/><br>
The simulated annual electrical output for a Solar8 system located in<br/><br>
Lund, Sweden, based on the conducted measurements, is 42 kWh.m-<br/><br>
2.yr-1 glazed area. For an ideal model using a PV module with 18%<br/><br>
COP, the output would increase to 59 kWh.m-2.yr-1 glazed area and 813<br/><br>
kWh.m-2.yr-1 PV cell area. The simulated thermal output from the<br/><br>
system is 330 kWh.m-2.yr-1 at 25°C working temperature. If the trough is<br/><br>
instead operated at a working temperature of 50°C, the electric output<br/><br>
would decrease with approximately 11% and the thermal output with<br/><br>
10%.<br/><br>
For Madrid, the simulated thermal output is 681 kWh.m-2.yr-1 glazed<br/><br>
area and the electrical output would be 118 kWh.m-2.yr-1 glazed area and<br/><br>
1607 kWh.m-2.yr-1 cell area respectively, to compare with 257 kWh.m-<br/><br>
2.yr-1 for a fixed flat module. This means that the PV cells deliver 6.3<br/><br>
Evaluation of the concentrating PVT systems MaReCo and Solar8<br/><br>
4<br/><br>
times as much electric energy per area unit. For Lund, the equivalent<br/><br>
value would be 5.4 times, which is due to the lower ratio of direct<br/><br>
radiation in Northern Europe.<br/><br>
The study has shown that there still is much work to be done<br/><br>
concerning the geometric design and the reflector surface, in order to<br/><br>
increase the output. The components should also be made cheaper and<br/><br>
economically more viable, and the producers must prove that they can<br/><br>
meet the challenge of creating stabile, reliable systems with low<br/><br>
demands of maintenance.<br/><br>
Concentrating PVT-systems show a potential to fill a larger share of the<br/><br>
future solar energy market. They offer the possibility of lowering the<br/><br>
costs, at the same time as they have less impact on the environment<br/><br>
than flat PV-systems. With several European countries giving subsidies<br/><br>
to solar energy, the possibility to introduce this new solar technology to<br/><br>
the market is presently good.},
  author       = {Pihl, Erik and Thapper, Cecilia},
  isbn         = {91-85147-18-4},
  language     = {eng},
  pages        = {142},
  publisher    = {ARRAY(0xa41eed8)},
  series       = {EBD-R--06/13},
  title        = {Evaluation of the concentrating PVT systems MaReCo and Solar8},
  year         = {2006},
}