An investigation into the thermal performance of a thermosyphon solar water heater

Τίτλος

An investigation into the thermal performance of a thermosyphon solar water heater

Θέμα

Solar water heaters

Solar water heaters--Testing

Δημιουργός

Tomaridis, Ioannis (Johny)

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

1998

Συνεισφέρων

Mechaelides, I.

Δικαιώματα

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

Μορφή

pdf

Γλώσσα

en

Τύπος

text

Αναγνωριστικό

MED0302

Σύνοψη

An investigation into the Thermal Performance of a Thermosyphon Solar Water Heater Objectives:
1. To study the ISO Standard on the Procedures for the performance characterization and yearly performance prediction of solar water heating systems.
2. To study the data acquisition system and the software available at the Test Center of the Applied Energy Center.
3. To carry out experimental tests and investigate the perfonnance characteristics of a thermosiphon solar water heater, using the method described in ISO 9459-2
4. To analyze the test results and, if possible, compare them with simulation result The first step that had to be taken in starting this project was to study the ISO standards in order to get an idea of the general structure of the program that had to be written which would take the readings required and according to ISO standards.
The next step that followed was to study the hardware available and adjust them for the needs of the test. After setting up the hardware small programs were written which tested the equipment used to perform the test (such as thermocouples, pump, solenoid valve). With those modules the whole program was constructed and run.
Readings were taken for individual days independent of each other recording the infonnation required for the long-term prediction. The tests included a four-day test for sunny days, two-day tests for cloudy days, a draw off of water to determine the mixing curve that occurs in the storage cylinder as well as overnight heat losses for the storage tank and for the system as a whole.
These results however could not be used to make any statements about the performance of the system since they are in the form of system performance characteristics to be used to produce usefullong-term.lesults upon which conclusions can be made. 3
To make conclusions and understand the limitations and the advantages of the system however a person must know well every aspect of the design of the system. At the beginning of the project therefore more general information is given on the solar energy and the different designs of solar systems. Further on more specific information of the design of thermosiphon systems will be found which will help us justify the results of the obtained on the particular solar domestic hot water system.