Effect of change in flow rate on performance parameters of shell and helical tube type heat exchanger.

In this paper performance investigation of shell and helical tube (volute pipe) type heat exchanger (interchanger) is presented. In this analysis different parameters affecting performance of heat interchanger such as fluid temperatures, overall heat flow coefficient, flow rate of fluid, heat flow rate, thermal conductivity, thermal efficiency, tube diameter, tube length, thickness of tube, effectiveness etc. are taken into considerations. The effect of change in flow rate on other performance parameters is studied for same geometrical configuration. The rate of mass flow of warm and cold fluid is varied between 1 LPM and 2 LPM and results are presented. As the mass moving rate of both fluid escalate the overall heat flow coefficient and actual heat flow coefficient value also rises. The Heat interchanger effectiveness is adversely altered by mass flow rate of both warm and cold fluid. The escalation in rate of mass flow lowers down the effectiveness approximately up to 16%. The experimental value of effectiveness of heat interchanger is less than one. All the experimental results have been validated based on value of heat interchanger effectiveness. The NTU value is also affected by rate of mass flow of warm and cold fluid. As rate of mass flow increases, the corresponding value of NTU deteriorates. The specific heat of warm fluid is greater than cold fluid. [ABSTRACT FROM AUTHOR]