Performance Study of Once-Through Solar Water Heater
Journal Title: IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) - Year 2018, Vol 15, Issue 2
Abstract
The paper presents a detailed mathematical model for performance study of a once-through solar water heater. The model is validated against experimental results. It has been utilized to study the solar water heater performance for a range of design, ambient and operating parameters, and heat transfer enhancement on thermal efficiency and pressure drop. The collector with selective coating (ε = 0.1) has a thermal performance advantage of 9-16% depending on the flow rate. A collector with 2 mm thick fins brazed or 0.5 mm thick fins laser or ultrasonic welded have practically the same performance. Use of the heat transfer enhancement devices, such as a twisted tape, can improve the thermal efficiency of the collector by 5.3-6.2% for three times heat transfer enhancement. The results of the study are presented in the form of design plots along with the results of variations in various parameters.
Authors and Affiliations
Rajendra Karwa, Chandresh Sharma
Keywords
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- EP ID EP437867
- DOI 10.9790/1684-1502054665.
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