Improving load matching characteristics of a thermosyphonic solar system by thermostatically controlled circulation

A. Arbel, M. Sokolov

Research output: Contribution to journalArticlepeer-review

Abstract

The load matching characteristics of a thermosyphonic solar water heater can be improved by utilizing a thermostatic flow control (TFC). Simulation of the performance of a typical thermosyphonic domestic solar heater, with and without a TFC, was used to evaluate the yearly requirement of auxiliary energy to meet four different loads. The amount of yearly auxiliary energy required to fully match the load demands is used as a measure of the matching improvement. Results indicate that, for load temperatures of 40°, 60°, and 70°C, the thermostatic flow controller improves the system's (multi- or single-pass) performance, while the common single-pass system without the thermostatic flow controller is the best choice for a 50°C load temperature.

Original languageEnglish
Pages (from-to)347-358
Number of pages12
JournalSolar Energy
Volume52
Issue number4
DOIs
StatePublished - Apr 1994

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