Performance optimization and parameter analysis of water cooling micro-channel separated heat pipes
A one-dimensional steady-state thermal performance simulation model for water cooling micro-channel sepa-rated heat pipes was established based on the method of efficiency-number of transfer unit.Under the condition of fixed cross-sectional area of evaporator,optimization design and parameter analysis by orthogonal test were carried out.The impacts of num-ber of flat tubes,internal height of flat tubes,air flow rate,and fin pitch of evaporator on the performance of system in terms of cooling capacity,energy efficiency ratio(EER)and cooling capacity per unit aluminum quality of evaporator were analyzed.Through optimization,the cooling capacity,EER,and cooling capacity per unit aluminum quality of the system are increased by 41.19％,390.93％～395.94％,and 28.54％,respectively.The ranking order of the effects parameters on the cooling capacity is:air flow rate＞number of flat tubes＞fin pitch＞the internal height of flat tubes.The ranking order of EER is:fin pitch＞air flow rate＞number of flat tubes＞the internal height of flat tubes.While that of cooling capacity per unit aluminum quality is:air flow rate＞fin pitch＞number of flat tubes＞the internal height of flat tubes.
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