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RESEARCH PAPERS

Analysis and Optimization of a Multi-Stage Solar Collector System

[+] Author and Article Information
J. M. Gordon

Applied Solar Calculations Unit, Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, Israel

C. Saltiel

Mechanical Engineering Department, Manhattan College, Riverdale, N.Y. 10471

J. Sol. Energy Eng 108(3), 192-198 (Aug 01, 1986) (7 pages) doi:10.1115/1.3268092 History: Received July 01, 1985; Online November 11, 2009

Abstract

We present an analytic method for predicting the long-term performance of solar energy systems with more than one collector brand (“multi-stage” systems). This procedure enables the designer to determine the most cost-effective method of combining different collector brands for a given load. Although our derivations pertain to solar systems for constant load applications and/or near constant collector operating threshold, they can also be used for conventional multi-pass designs. The problems of excess energy delivery, and of various collector on/off control strategies, are taken into account. Our results are simple closed-form expressions whose evaluation requires readily-available average climatic data, and load and collector characteristics. The analytic method is illustrated by a solved example which shows that significant savings can be realized by combining different collector brands for a given application (multi-staging).

Copyright © 1986 by ASME
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