Evaluation of high pressure water heating solar collector for hot water production /
Canrado Mislang Baltazar.
- Los Baņos, Laguna : University of the Philippines, 1987.
- xiv, 63 pages : illustrations ; 28 cm.
Thesis (M.S. - - Agricultural Engineering) University of the Philippines.
Includes bibliographical references.
BALTAZAR, CONRADO MISLANG. University of the Philippines at Los Banos, May, 1987. Evaluation of High Pressure Water Heating Solar Collector for Hot Water Production. Major Professor: Dr. Emerico R. Mendoza
The general objective of this study was to evaluate high pressure water heating solar collectors manufactured by LOF Solar Energy Systems. The collector was 2.13 m long and 0.91 m wide with a collector area of 1.95 sq. m. Collector tubes and absorber plates were made of anodized copper.
The study consists of two parts, namely, individual collector performance and performance of composite or multiple collector systems. In the individual collector performance, individual collectors were tested at three flow rates classified as low (0.5 kg/min), medium (1.0 kg/min) and high (1.5 kg/min). Among the three flow rates, the low flow rate had the highest mean thermal efficiency.
In the composite collector performance, three collectors connected in series and parallel were tested. Results showed higher thermal efficiencies of the series connected system.
It was also observed that the collectors reached maximum efficiency around 3 p.m., except for the parallel set-up wherein maximum efficiency was attained earlier at 12p.m. Lowest thermal efficiencies were observed in all treatments at 8 a.m. to 9 a.m. or in the first hour of observation, and gradually increasing for the next few hours.
Statistical analysis and tests revealed significant effect of flow rate, time of the day and interaction effects between the treatments. The effect of this type of connection was not significant.