Evaluation of the performance of thermosyphon solar water heater

Τίτλος

Evaluation of the performance of thermosyphon solar water heater

Θέμα

Geysers

Solar water heaters--Testing

Δημιουργός

Thrasyvoulou, Thrasos

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

1995

Συνεισφέρων

Michaelides, 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

MED0409

Σύνοψη

The objective of this project was to use the cyprus standard CYS:209:91 for performance characterisation and yearly performance of atypical Cypriot thermosyphon water heater.
The upcoming steps were followed for the completion of this project:
[1] First of all, a review study was done about different types of solar domestic hot water system employed in Cyprus.
[2] Then, a general review was carried out of the performance of a thermosyphon solar water heater such as collector, and collector efficiency, storage tank e.t.c.
[3] Furthermore, the parameters affecting the performance of a thermosyphon were analysed.
[4] Next, the term short system test method with results and draw off profiles were conducted. The results obtained from the short term test (4 days with daily solar irradiation in the range 15-25 MJ/m2 and 2 days with daily solar irradiation in range 0-15 MJ/m ) ie the performance characteristics of the system were independent of the location of the test.
[5] The final results of the test procedure and long term performance prediction were presented so that they can be easily understood by consumers and manufactures, in terms of anual energy savings (KWh/year). A procedure was therefore developed which used the results of the short term test to predict the long term performance of thermosyphon water heater.
The procedure described by the Cys:209 for experimentally predicting the performance of SDH produces results which are not site specific and therefore are valid everywhere provided the local climatic conditions are known. As the method is the same used in Greece and other European countries local SDH manufactures will be in position to take advantage of opportunities which arise in the European market.
It gives consumers a criterion on which to base their selection of SWHS.
It provides an indication to manufacturers and prospective buyers on how efficiently the system work. So far there were available test results on collectors and storage tanks but the behaviour of the system could not be characterised by the component test results. The test results can be used to assess the impact of design, insulation and other changes to the system as such.
- The procedure homever required test, thus demanding to a long time and manpower.