The heat transfer coefficient of commonly used cold water machine

by:CBFI     2020-09-25
Is a factory has ten years production experience of cold water, cold water machine to do the calibration services. Company is mainly manufacturing and marketing of professional cold water machine | industrial cold water machine | low-temperature cold water machine | air-cooled industrial ice machine and cold water machine screw chillers | | | ice water machine water cooled chillers | centrifugal chillers and other products, and has a number of refrigeration equipment industry technical experts, cited Germany's advanced technology, can provide customers with a complete and comprehensive chillers technical solutions. And the professional, considerate, timely after-sales service.

in the cold water machine design, selection of heat exchanger and generally choose a first experience of heat transfer coefficient, then checking heat transfer area can be achieved. The following list of commonly used the experience of the heat exchanger heat transfer coefficient:

1. The experience of the tube and shell heat exchanger heat transfer coefficient of the






fluid


the heat transfer coefficient of the





the inside of the



the lateral



W· m - 2· ℃, 1













10~35









清水



20~70





清水



清水



1000~2000





高粘度液体



清水



100~300





低粘度液体



清水



200~450





低粘度液体



低粘度液体



116~337









水蒸汽冷凝



1000~2000





2. The experience of the spiral plate heat exchanger heat transfer coefficient of the






fluid


the heat transfer coefficient of the





W· m - 2· ℃, 1





清水



清水



1750~2210





清水







140~350





清水







35~70





有机物



有机物



350~810













160~200









水蒸汽冷凝



1980~3980





3. The experience of the plate heat exchanger heat transfer coefficient of the






fluid


the heat transfer coefficient of the





W· m - 2· ℃, 1





清水



清水



2900~4950





冷水







400~580





清水







25~58













175~350





水蒸汽







810~930





在有关传热手册和专著中载有某些情况下 K 的经验数值,可供设计参考。 Note should choose process conditions close to similar, heat transfer equipment is relatively mature experience of K value as a design basis. 。 k4 v1 g0 R( P

fluid type total heat transfer coefficient K W/( m2• K) 4 ~ % C ! A6 W1 J
water & ndash; Gas e" 12 ~ 60%; d6 X' O ' B / ') DR
water & ndash;
800 ~ 1800 the water & ndash; Kerosene around 350 V/D *! e1 f” b' T
water & ndash; Organic solvent of 280 ~ 850
gas & ndash; Gas 12 ~ 35
saturated steam & ndash; Water of 1400 ~ 47003 Y! 第一季度将{ 8 r; G0 D4 W * a
saturated steam & ndash; Gas p6 _ 30 ~ 3008. d# B# H' S4 `
saturated steam & ndash; Oil 60 ~ 350
saturated steam & ndash; Boiling oil 290-870






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