Performance Evaluation of a High Solar Fraction CPC-Collector System
Bernardo, Ricardo LU
; Davidsson, Henrik
LU
and Karlsson, Björn
LU
(2011)
In Journal of Environment and Engineering
6(3).
p.680-692
- Abstract
- One of the most important goals on solar collector development is to increase the
system’s annual performance without increasing overproduction. The studied
collector is formed by a compound parabolic reflector which decreases the collector
optical efficiency during the summer period. Hence, it is possible to increase the
collector area and thus, the annual solar fraction, without increasing the
overproduction. Collector measurements were fed into a validated TRNSYS
collector model which estimates the solar fraction of the concentrating system and
also that of a traditional flat plate collector, both for domestic hot water production.
The system design approach aims to... (More) - One of the most important goals on solar collector development is to increase the
system’s annual performance without increasing overproduction. The studied
collector is formed by a compound parabolic reflector which decreases the collector
optical efficiency during the summer period. Hence, it is possible to increase the
collector area and thus, the annual solar fraction, without increasing the
overproduction. Collector measurements were fed into a validated TRNSYS
collector model which estimates the solar fraction of the concentrating system and
also that of a traditional flat plate collector, both for domestic hot water production.
The system design approach aims to maximise the collector area until an annual
overproduction limit is reached. This is defined by a new deterioration factor that
takes into account the hours and the collector temperature during stagnation
periods. Then, the highest solar fraction achieved by both systems was determined.
The results show that, at 50° tilt in Lund, Sweden, the concentrating system
achieves 71% solar fraction using 17 m2 of collector area compared to 66% solar
fraction and 7 m2 of a flat plate collector system. Thus, it is possible to install 2.4
times more collector area and achieve a higher solar fraction using the load adapted
collector. However, the summer optical efficiency reduction was proven to be too
abrupt. If the reflector geometry is properly design, the load adapted collector can
be a competitive solution in the market if produced in an economical way. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3351125
- author
- Bernardo, Ricardo
LU
; Davidsson, Henrik
LU
and Karlsson, Björn
LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Concentrating Solar Thermal, CPC, Domestic Hot Water, High Solar Fraction
- categories
- Higher Education
- in
- Journal of Environment and Engineering
- volume
- 6
- issue
- 3
- pages
- 680 - 692
- publisher
- Japanese Society of Mechanical Engineers
- DOI
- 10.1299/jee.6.680
- project
- International Energy Agency. Solar Heating and Cooling Programme
- language
- English
- LU publication?
- yes
- additional info
- 3
- id
- 5780e2d9-5bff-4cc8-89f7-d065f2d411e8 (old id 3351125)
- alternative location
- http://www.jstage.jst.go.jp/article/jee/6/3/6_680/_article
- date added to LUP
- 2016-04-04 11:17:01
- date last changed
- 2018-11-21 21:03:50
@article{5780e2d9-5bff-4cc8-89f7-d065f2d411e8,
abstract = {{One of the most important goals on solar collector development is to increase the<br/><br>
system’s annual performance without increasing overproduction. The studied<br/><br>
collector is formed by a compound parabolic reflector which decreases the collector<br/><br>
optical efficiency during the summer period. Hence, it is possible to increase the<br/><br>
collector area and thus, the annual solar fraction, without increasing the<br/><br>
overproduction. Collector measurements were fed into a validated TRNSYS<br/><br>
collector model which estimates the solar fraction of the concentrating system and<br/><br>
also that of a traditional flat plate collector, both for domestic hot water production.<br/><br>
The system design approach aims to maximise the collector area until an annual<br/><br>
overproduction limit is reached. This is defined by a new deterioration factor that<br/><br>
takes into account the hours and the collector temperature during stagnation<br/><br>
periods. Then, the highest solar fraction achieved by both systems was determined.<br/><br>
The results show that, at 50° tilt in Lund, Sweden, the concentrating system<br/><br>
achieves 71% solar fraction using 17 m2 of collector area compared to 66% solar<br/><br>
fraction and 7 m2 of a flat plate collector system. Thus, it is possible to install 2.4<br/><br>
times more collector area and achieve a higher solar fraction using the load adapted<br/><br>
collector. However, the summer optical efficiency reduction was proven to be too<br/><br>
abrupt. If the reflector geometry is properly design, the load adapted collector can<br/><br>
be a competitive solution in the market if produced in an economical way.}},
author = {{Bernardo, Ricardo and Davidsson, Henrik and Karlsson, Björn}},
keywords = {{Concentrating Solar Thermal; CPC; Domestic Hot Water; High Solar Fraction}},
language = {{eng}},
number = {{3}},
pages = {{680--692}},
publisher = {{Japanese Society of Mechanical Engineers}},
series = {{Journal of Environment and Engineering}},
title = {{Performance Evaluation of a High Solar Fraction CPC-Collector System}},
url = {{http://dx.doi.org/10.1299/jee.6.680}},
doi = {{10.1299/jee.6.680}},
volume = {{6}},
year = {{2011}},
}