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The Refrigerant-side Structure Optimization and Performance Simulation of Parallel Flow Condenser

Author: LuYang
Tutor: ChenHuanXin
School: Huazhong University of Science and Technology
Course: Refrigeration and Cryogenic Engineering
Keywords: Parallel flow condenser Headers Small channel Structural optimization Numerical Simulation
CLC: TK124
Type: Master's thesis
Year: 2009
Downloads: 101
Quote: 0
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Abstract


Aluminum parallel flow heat exchanger has a high heat transfer efficiency , compact structure, and many other advantages , has an irreplaceable position in the field of automotive air conditioning , home air conditioning replacement , the most promising form of heat exchanger . In this paper, the numerical simulation method , to study the performance of parallel flow condenser refrigerant side , home air conditioning operating conditions to optimize its structure . Parallel flow condenser set single-phase fluid distribution tube performance numerical simulation to analyze the composition of the intake manifold and the manifold height , a flat tube manifold combinations depth as well as single-phase fluid inlet mass flow of fluid distribution uniformity investigated . The proposed parallel flow condenser for home air conditioning , horseshoe header , due to lower intake manifold and manifold combination of height , to reduce the depth of the flat tube and manifold combination , can effectively improve the uniformity of the single-phase fluid distribution manifold . Small flat tube channel flow and heat transfer performance simulation study , analysis of the distribution of the velocity field of fluid flow and heat transfer in small channels , temperature field and at the outlet of condensate liquid and condensed liquid formed in the walls of the small channel a thin layer of liquid film flow phenomena . The refrigerant heat transfer coefficient , pressure drop with inlet dryness small flat tube channel inlet mass flow rate variation , the results show that : in the refrigerant inlet dryness large , strong flat tube heat transfer performance of the small channel . ; fine channels of a specific structure , there is the optimal range of the mass flow of the refrigerant inlet . The results of this study provides a theoretical basis for the promotion and application of parallel flow condenser in the field of home air conditioning and optimal design .

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CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Thermal Engineering Theory > Heat Transfer
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