International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
www.irjet.net
REVIEW ON EFFECT OF CHEVRON ANGLE AND NUMERICAL INVESTIGATION OF DIMESIONLESS NUMBERS Neeraj Kumar Ram1, Neelesh Soni2 1Research
Scholar, Department of Mechanical, ITM University, Gwalior, India Professor, Department of Mechanical, ITM University, Gwalior, India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract - Plate heat exchanger PHE) is type of heat exchanger in which heat transfer takes place between fluids through separating wall. The geometry of PHE is one of the most important factors of rate of heat transfer and pressure drop .corrugation of plate inhances heat transfer due to increasing the turbulence in flow. Now a day PHE is being used widely in heating application, food industry, chemical industry, refrigeration industry, marine application and fresh water generation system from sea water. The objective of this paper is to review the effect of chevron angles and numerical investigation of dimensionless Figure 1: 1Various parts of plate heat exchanger [2] numbers. Further we shall design the PHE by using the solid work design software with chevron angles 45◦, 61◦, 63◦, and THERMAL ANALYSIS 65◦ at constant dimensions. The rate of heat transfer coefficient, pressure drop dimensionless numbers like The rate of heat transfer is given by Nusselt, Prandtl and Reynolds numbers will be evaluated by using the Ansys simulation software. 2Assistant
Key Words: plate heat exchanger, chevron angle, heat transfer coefficient, pressure drop. 1 INTRODUCTION A heat exchanger is device in which heat (enthalpy) is transfered from one fluid to another fluid. Plate heat exchanger (PHE) is recuperator or transfer type heat exchanger in which heat is transfered through the separating wall. PHE consist of a number of corrugated metal plates with corner portholes and gasket. The gasket prevents the leakage and mixing of the fluids. Fluids flow alternatively in different plate with counter flow. Plates are assembled between a fixed frame plate and movable pressure plate with help of nut and bolt. Due to high overall heat transfer coefficient (3 – 4 times as compare to shell and tube types), compactness, easy to removing and cleaning of plates it is used in different type of industries and plants like food and beverage , petrochemical, pharmaceutical, hydrocarbon processing, polymers etc.[1]
Q*= UA (∆T)m ……………….[1] = UA F (∆Tlm) counterflow ∆Tlm = ( ∆T1 - ∆ T2 ) / ln (∆T1 /∆ T2) ∆T1 = Tho – Tci ∆ T2= Thi - Tco Where U= overall heat transfer coefficient (w/m2k) A= heat transfer area ( m2) F= correction factor ∆Tlm = log mean temperature difference (k) Q* = rate of heat transfer (w)
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