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Performance of small low-flow solar heating systems; Smaa low flow solvarmeanlaegs ydelser

Abstract

A detailed mathematical model simulating the thermal behaviour of a small low flow solar heating system based on mantle heat storage was validated by means of measurements already carried out on a small low flow solar heating system for domestic hot water supply. It was then investigted how the thermal performance of low flow systems is influenced by variations of the solar irradiance caused by clouds. The thermal performances of low flow systems and of traditional solar heating systems have been calculated. Especially for small solar fractions and for small ratios between the hot water consumption and the solar collector area, the extra performance of the low flow system compared to the performance of the traditional solar heating system is significant. The model does not take the inappropriate mixing between hot water heated by the auxiliary energy source and colder water heated by the solar collector into consideration. By means of the validated mathematical model a number of calculations with different system designs have been carried out. Based on these calculations figures showing the yearly thermal performance of differently designed low flow systems have been prepared. (AB).
Publication Date:
Aug 01, 1991
Product Type:
Technical Report
Report Number:
DTH-LV-MEDD-221
Reference Number:
SCA: 140907; PA: DK-92:001007; SN: 92000700137
Resource Relation:
Other Information: DN: EFP-90; PBD: Aug 1991
Subject:
14 SOLAR ENERGY; SOLAR WATER HEATING; PERFORMANCE TESTING; MATHEMATICAL MODELS; COMPARATIVE EVALUATIONS; CLOUDS; IRRADIATION; 140907; WATER HEATING
OSTI ID:
10133528
Research Organizations:
Danmarks Tekniske Hoejskole, Lyngby (Denmark). Lab. for Varmeisolering
Country of Origin:
Denmark
Language:
Danish
Other Identifying Numbers:
Other: ON: DE92793198; CNN: Contract ENS-1213/90-0004; TRN: DK9201007
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
DK
Size:
53 p.
Announcement Date:
Jul 04, 2005

Citation Formats

Furbo, S, and Fagerlund Carlsson, P. Performance of small low-flow solar heating systems; Smaa low flow solvarmeanlaegs ydelser. Denmark: N. p., 1991. Web.
Furbo, S, & Fagerlund Carlsson, P. Performance of small low-flow solar heating systems; Smaa low flow solvarmeanlaegs ydelser. Denmark.
Furbo, S, and Fagerlund Carlsson, P. 1991. "Performance of small low-flow solar heating systems; Smaa low flow solvarmeanlaegs ydelser." Denmark.
@misc{etde_10133528,
title = {Performance of small low-flow solar heating systems; Smaa low flow solvarmeanlaegs ydelser}
author = {Furbo, S, and Fagerlund Carlsson, P}
abstractNote = {A detailed mathematical model simulating the thermal behaviour of a small low flow solar heating system based on mantle heat storage was validated by means of measurements already carried out on a small low flow solar heating system for domestic hot water supply. It was then investigted how the thermal performance of low flow systems is influenced by variations of the solar irradiance caused by clouds. The thermal performances of low flow systems and of traditional solar heating systems have been calculated. Especially for small solar fractions and for small ratios between the hot water consumption and the solar collector area, the extra performance of the low flow system compared to the performance of the traditional solar heating system is significant. The model does not take the inappropriate mixing between hot water heated by the auxiliary energy source and colder water heated by the solar collector into consideration. By means of the validated mathematical model a number of calculations with different system designs have been carried out. Based on these calculations figures showing the yearly thermal performance of differently designed low flow systems have been prepared. (AB).}
place = {Denmark}
year = {1991}
month = {Aug}
}