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Title: Analytical predictions of liquid and air photovoltaic/thermal, flat-plate collector performance

Abstract

Two separate one-dimensional analyses have been developed for the prediction of the thermal and electrical performance of both liquid and air flat-plate, photovoltaic/thermal (PV/T) collectors. The results of the analyses are compared with test measurements, and therefrom design recommendations are made to maximize the total energy extracted from the collectors. 16 refs.

Authors:
Publication Date:
Research Org.:
MIT, Lexington, MA
OSTI Identifier:
5134490
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Sol. Energy Eng.; (United States); Journal Volume: 103:4
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; COMBINED COLLECTORS; DESIGN; MATHEMATICAL MODELS; PERFORMANCE; FLAT PLATE COLLECTORS; HEAT TRANSFER; PHOTOVOLTAIC EFFECT; ENERGY TRANSFER; EQUIPMENT; PHOTOELECTROMAGNETIC EFFECTS; SOLAR COLLECTORS; SOLAR EQUIPMENT; 140501* - Solar Energy Conversion- Photovoltaic Conversion; 141000 - Solar Collectors & Concentrators

Citation Formats

Raghuraman, P. Analytical predictions of liquid and air photovoltaic/thermal, flat-plate collector performance. United States: N. p., 1981. Web. doi:10.1115/1.3266256.
Raghuraman, P. Analytical predictions of liquid and air photovoltaic/thermal, flat-plate collector performance. United States. doi:10.1115/1.3266256.
Raghuraman, P. Sun . "Analytical predictions of liquid and air photovoltaic/thermal, flat-plate collector performance". United States. doi:10.1115/1.3266256.
@article{osti_5134490,
title = {Analytical predictions of liquid and air photovoltaic/thermal, flat-plate collector performance},
author = {Raghuraman, P.},
abstractNote = {Two separate one-dimensional analyses have been developed for the prediction of the thermal and electrical performance of both liquid and air flat-plate, photovoltaic/thermal (PV/T) collectors. The results of the analyses are compared with test measurements, and therefrom design recommendations are made to maximize the total energy extracted from the collectors. 16 refs.},
doi = {10.1115/1.3266256},
journal = {J. Sol. Energy Eng.; (United States)},
number = ,
volume = 103:4,
place = {United States},
year = {Sun Nov 01 00:00:00 EST 1981},
month = {Sun Nov 01 00:00:00 EST 1981}
}
  • Two separate one-dimensional analyses have been developed for the prediction of the thermal and electrical performance of both liquid and air flat-plate photovoltaic/thermal (PV/T) collectors. The analyses account for the temperature difference between the primary insolation absorber (the photovoltaic cells) and the secondary absorber (a thermal absorber flat plate). The results of the analyses are compared with test measurements, and therefrom, design recommendations are made to maximize the total energy extracted from the collectors.
  • A one-dimensional analysis developed by MIT Lincoln Laboratory predicts the electrical and thermal performance of an air photovoltaic/thermal flat-plate collector. The analysis compares well with test measurements, predicting the thermal efficiency to within 2 percent. From the analysis, the poor thermal performance of the collector is attributable, in part, to the large undulations of the cell/silicone pottant surface in contact with the flowing air that results in less effective convective heat-transfer areas between the cell and the air.
  • A one-dimensional analysis has been developed that predicts the electrical and thermal efficiencies of a liquid photovoltaic/thermal flat-plate collector - the latter, to within 4 percent. The analysis, agreeing with test measurements, reduces the 15-percent difference between analysis and measured thermal efficiency obtained by the classical analysis of Hottel and Whillier as extended by Florschuetz to PV/T collectors.
  • A combined photovoltaic/thermal (PV/T), flatplate, liquid collector, where the liquid circulates both below and above the photovoltaic cells (the primary energy-absorbing surface), has been designed and tested according to ASHRAE 93-77 specifications to yield collector thermal and electrical efficiencies. A one-dimensional thermal analysis predicts the test results accurately. On the strength of the test and analytical results, design recommendations are made to maximize the total energy extracted from the collectors.