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Performance Evaluation of a High Solar Fraction CPC-Collector System
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- Bernardo, Ricardo (author)
- Lund University,Lunds universitet,Institutionen för arkitektur och byggd miljö,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Architecture and Built Environment,Departments at LTH,Faculty of Engineering, LTH
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- Davidsson, Henrik (author)
- Lund University,Lunds universitet,Institutionen för arkitektur och byggd miljö,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Architecture and Built Environment,Departments at LTH,Faculty of Engineering, LTH
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- Karlsson, Björn (author)
- Lund University,Lunds universitet,Avdelningen för Energi och byggnadsdesign,Institutionen för bygg- och miljöteknologi,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Energy and Building Design,Department of Building and Environmental Technology,Departments at LTH,Faculty of Engineering, LTH
- (creator_code:org_t)
- Japan Society of Mechanical Engineers, 2011
- 2011
- English.
- In: Journal of Environment and Engineering. - : Japan Society of Mechanical Engineers. - 1880-988X. ; 6:3, s. 680-692
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering (hsv//eng)
Keyword
- Concentrating Solar Thermal
- CPC
- Domestic Hot Water
- High Solar Fraction
Publication and Content Type
- art (subject category)
- ref (subject category)
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