natural convection heat transfer from a tube bundle in the indirect water bath heaters is investigated. a computer-code is used for the solution of the governing equations of mass, momentum and energy transfer based on the simple-c algorithm. simulations are carried out for the gas pressure station heater of kermanshah city with various tube bundle arrangements. in order to validate the numeric...

Solar air heater is a type of heat exchanger which transforms solar radiation into heat energy. The thermal performance of conventional solar air heater has been found to be poor because of the low convective heat transfer coefficient from the absorber plate to the air. Use of artificial roughness on a surface is an effective technique to enhance the rate of heat transfer. A CFD-based investiga...

Utilization of solar energy is increasing in different states the world, and sun regarded as largest source continuous coherent energy. In present study, a novel configuration v-corrugated collector with triangular channels for domestic water heating has been analytically investigated. A mathematical model based on effectiveness-NTU method established to thermally examine collector. Additionall...

Solar thermal water heating systems have been developed to replace conventional heating. Therefore, the design of a parabolic cylinder collector-type solar unit with coil-shaped heater (absorber) has carried out. The cylindrical collector is made an aluminum plate covered reflective sticker and base insulated, having diameter, height, length, position focal point 150, 60, 200, 22.4 cm, respecti...