Patent ID: 6189607
Filing Date: 2001-02-20
Classification: F28D,F28F

Abstract:
A multi-flow type heat exchanger comprising a pair of headers, and a plurality of heat transfer tubes interconnecting said pair of headers, and in which a flow direction of a heat exchange medium through said plurality of heat transfer tubes is only in one direction, wherein said headers and said tubes are formed, such thata flow division parameter .gamma. is defined as a ratio of a resistance parameter .beta. of said plurality of heat transfer tubes to a resistance parameter .alpha. of a header located on an entrance side of said heat exchanger, in a range of at least about 0.5;and wherein said flow division parameter is calculated, such that.gamma.=.beta./.alpha.,where.beta.=Lt/(Dt.multidot.n),and.alpha.=Lh/Dh;and wherein equation variables are defined as follows:Lt equals a length of each tube,Dt equals a hydraulic diameter of one tube,n equals a number of tubes,Lh equals a length of said header located on an the entrance side of said heat exchanger, andDh equals a hydraulic diameter of said header located on the entrance side of said heat exchanger.