Computer simulation of thermosyphon solar water heaters

Τίτλος

Computer simulation of thermosyphon solar water heaters

Θέμα

Thermosyphones--Cyprus

Solar water heaters

Solar system

Δημιουργός

Voskos, George

Πηγή

Higher Technical Institute

Το πλήρες κείμενο είναι διαθέσιμο από το Υπουργείο Ενέργειας, Εμπορίου Βιομηχανίας και Τουρισμού.

Εκδότης

Library of Cyprus University of Technology

Ημερομηνία

1994

Συνεισφέρων

Michailides, J.

Δικαιώματα

Απαγορεύεται η δημοσίευση ή αναπαραγωγή, ηλεκτρονική ή άλλη χωρίς τη γραπτή συγκατάθεση του δημιουργού και κάτοχου των πνευματικών δικαιωμάτων.

Μορφή

pdf

Γλώσσα

eng

Τύπος

text

Αναγνωριστικό

MED0220

Σύνοψη

The purpose of this project was to investigate the performance characteristics of typical Cypriot thermosyphon solar water heaters. Five design configurations of the Cypriot thennosyphon solar system were modeled and simulated by using the TRNSYS simulation program.
This project is divided into six chapters.
In the first chapter an introduction was made about Solar water heating, the solutions for perfonnance predictions, and generally about the objectives of
this study.
In the second chapter the individual parts of the thennosyphon solar water heater, the factors affecting the operation of each part, and the perfonnance
of the system were analyzed.
In the third chapter a theory was established concerning the representation of solar systems in models. The advantages obtained for modeling approaches were listed and the various types of models were analyzed.
In the fourth chapter a theory was developed about TRNSYS simulation program, a general description for the systems tested was made, the subroutines representing the parameters of the models were defined. And then detailed drawings for the models tested were illustrated.
In the fifth chapter the simulation results which were illustrated in graphic presentations were analyzed. This chapter also includes tables with the results obtained by daily and yearly simulations, and also schematic
diagrams illustrating the five models tested.
Finally in the last chapter the most important results were listed and also an optimisation was curried out according the simulation results of each system.
The results of this investigation indicated that the models with external auxiliary heaters are the most reliable among the models tested since they
present the highest perfonnance. Another significant observation was that the model having a vertical storage tank and built-in auxiliary heater, presents much better perfonnance characteristics when the auxiliary heater
is fitted at a higher level in the storage tank.