An Overview of Influencing Parameters on Performance of a Mantle Heat Exchanger for a Solar Water Heater – A Simulation Study
Emerging Trends in Engineering Research and Technology Vol. 1,
Page 118-132
Abstract
Solar domestic hot water systems are used for absorbing solar energy during day time and using it on demand. In open-circuit cycle solar domestic hot water system, fluid inside the collector is directly injected to water inside the tank. In the case of closed-circuit cycle, in order to transfer heat between collector fluid and water inside the tank, a heat exchanger is used. Among all types, mantle heat exchanger is commonly used for solar water heaters.
In this research work, the performance of an innovative collector loop heat exchanger used in solar water heater is investigated experimentally. The heat exchanger evaluated in this work is a narrow gap mantle on a vertical tank. The heat exchanger is assessed for a range of operating conditions to quantify both the mantle side and the tank side heat transfer coefficients and the effect of thermal stratification in the tank. The experiments arte simulated and validated by using CFD tool ANSYS-CFX and a good agreement is obtained between experiments and simulations.
Keywords:
- Innovative heat exchanger
- vertical tank
- mantle side heat transfer coefficient
- tank side heat transfer coefficient
- operating conditions
- ANSYS-CFX
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