The Design of the Pre-Heater of Gas-Operated Hot-Water Heater

This study developed the pre-heating device which heats the water by using the exhaust gases from gas-operated hot-water heater. Thus the temperature of water is raised at an exit of the pre-heating device. The pre-heated water is then transport to the gas-operated hot-water heater to increase the water temperature which is used for showers. Thus, the thermal performance is enhanced with the pre-heating device. The overall performance of the absorption heater system is analyzed by finite element analysis. The different types of pre-heating devices are simulated for the thermal performance. Other important considerations for producing the pre-heating devices are the bending-tube technology and manufacturing cost. The appropriated design of pre-heating device is selected for producing. Thus the performance and testing of pre-heating devices will be carried out.