In the present article, heat transfer and fluid flow of air in a compact microchannel gas heater (MCGH) was experimentally quantified. To understand effect flux value (HFV), inlet velocity on coefficient (HTC), wall temperature, friction factor, Nusselt number, average pressure-drop (PDV) performance index (PI), constructed tested with pressurized air. The results showed that HTC 20 W/(sqmK) to...