A comparison of closed-form and finite-element solutions for heat transfer in a nearly horizontal, unglazed flat plate PVT water collector: Performance assessment

摘要

In order to compare the domestic hot water heating (DHW) and the power supply performances of a south-facing unglazed flat-plate PVT installed on a roof, with an 8 degrees gradient belonging to a solar house located in Madrid (40.24N, 3.410) with no surrounding obstacles, a finite element heat flux simulation was performed and contrasted with a theoretical mathematical model. In this manner, a correlation between the energy absorbed by water within the pipes in the PVT panel and its inlet temperature, dependant on the tank temperature, is approximated.