In this paper, the performance of a pressurised evacuated tube solar collector system using internal heat pipes is presented. The system was optimised for the seasonal supply of hot service water for residential use in Pretoria, South Africa. The prediction of seasonal hourly performance trends along with the maximum thermal performance at the optimal receiver array and manifold mass flow rate was of major concern in this investigation. A mathematical model representing the thermal performance of the system was developed and numerically implemented in Engineering Equation Solver. The dynamic performance of collectors with 15, 20 and 25 tubes was determined throughout all the seasons. Moreover, the performance of the residential solar water heating system with a 20-tube collector was investigated in detail for mass flow rates of 0.03, 0.05 and 0.07 kg/s.
|Original language||English (US)|
|Number of pages||17|
|Journal||International Journal of Sustainable Energy|
|State||Published - Oct 21 2018|
Bibliographical noteFunding Information:
The support received from the Tshwane University of Technology and the University of the Witwatersrand, Johannesburg, is duly acknowledged and appreciated. The support received from the National Research Foundation (South Africa) is also duly acknowledged and appreciated. We appreciated the South African Weather Service (SAWS) for providing the data used in this work.
© 2017, © 2017 Informa UK Limited, trading as Taylor & Francis Group.
- Solar thermal
- evacuated tube collectors
- heat pipe
- manifold mass flow rate
- receiver array
- solar water heating