Does a heat pipe solar water heating work?

The energy performance of a heat pipe solar water heating was studied in Dublin, Ireland by Ayompe and Duffy . The mean daily collected energy was 20.4 MJ/d resulted in the solar fraction and system efficiency of 33.8% and 52.0%, respectively.

Which type of heat pipe should be used for solar collectors?

On the other hand, to transfer the converted thermal energy timely and avoid overheating on the surface of solar collectors, a heat pipe which depends on liquid–vapor phase change heat transfer is an efficient choice , , , .

Do solar thermal systems need pipe insulation?

In order for the entire solar thermal system to work efficiently, good pipe insulation is crucial. After all, the less heat is lost on the way from the rooftop collector to the buffer storage tank in the cellar, the more heating fuel is saved and with it CO 2. Insulate properly – but how? Most solar thermal systems are indirect.

Can aluminium heat pipes be used in solar water heating system?

The maximum achieved efficiency of the collector was 60% which occurred at the solar radiation of 860 W/m2. Rassamakin et al. proposed the application of specially extruded aluminium heat pipes in the HPSC of a solar water heating system to reduce the contact thermal resistance between the heat pipe and the absorber.

What happens if a solar thermal system is not insulated?

If the pipes between the module and tank are poorly or not at all insulated, valuable heat is lost and the efficiency of the entire system is impaired. In an indirect solar thermal system, the pipes from the module act as a heat source for the hot water tank.

How many glass tubes should a heat pipe solar collector have?

A mathematical model was developed and used to calculate the optimum number of glass tubes of the heat pipe solar collector. Based on the obtained data, an experimental rig with 25 glass tubes was designed, built, and tested as the temperature changes after 25 tubes reached the insignificant value of 0.6%.