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Common conversion unit table for refrigeration
Common units and conversion 1 MW = 1000 KW 1 KW=1000 W 1 KW=861Kcal/h=0.39 P 1 W= 1 J/s 0.1MPa=1kg/cm2=10m mercury column =100KPa 1 USTR=3024Kcal/h=3517W(冷量) 1 BTU=0.252kcal/h=1055J 1 BTU/H=0.252kcal/h 1 BTU/H=0.2931W 1 MTU/H=0.2931KW 1 HP(electricity)=0.75KW(electricity) 1 KW(electricity...
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How to deel with the impurity in the refrigeration system?
1.The effect of water on the system I.Ice plug at expansion valve,resulting in poor fluid supply II.Part of the lubricating oil is emulsified,reduce the lubrication performance III.Hydrochloric acid and hydrogen fluoride are generated in the refrigerant system, which can corrode metal.And it has...
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Advantages and disadvantages of 5 compressors
1.Half-sealed piston refrigeration compressor Semi-enclosed piston compressors are more commonly used in cold storage and refrigerated markets (commercial refrigerated air conditioning is also useful, but is now used relatively infrequently). The semi-closed piston type cold storage compressor is...
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The reasons for motor burning
The reasons for motor burning can be divided into: load, power supply, motor insulation, default phase 1.Default phase Reason:Usually due to the lack of phase power.(1 phase unsupplied or insufficient supply voltage).Or the contactor contact point in the line is not closed.The wire connection poi...
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Thermoplastic composites are popular in Europe
According to a market report released by Lucintel,Thermoplastic composites in the European consumer goods market are expected to grow at a compound annual growth rate of 2% from 2017 to 2022.It could reach $1.2 billion by 2022.In the European market for consumer goods, The opportunity for thermop...
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Why set oil return tube
1.Why set oil return tube ? When there is a large height difference in the piping of the system, in order to prevent the refrigerating oil from effectively returning to the compressor and affecting the service life of the compressor, the oil storage tube must be set on the vertical pipe line. &nb...
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Bad frozen oil ruined a compressor
1.Viscosity of frozen oil:The frozen oil has a certain viscosity to keep the friction surface of the moving parts in good lubrication state, so that it can take part of the heat from the compressor and play a sealing role. The oil works at two extreme temperatures:Compressor exhaust valve tempera...
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Resin processing costs skyrocketed
According to a survey report on the status of members of the Japan plastics industry association from April to June 2018,production and sales increased from January to march.On the one hand, the “upturn” in the amount calculation decreased and the “deterioration” increased...
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How to removing scale in shell – tube condenser
There are three ways to prevent and remove scale: 1. Mechanical descaling method: mechanical descaling is a method of descaling the condenser of steel cooling tube with a soft shaft pipe washer, especially for vertical shell and tube condenser. The operation method: ⑴Extract the refrigerant from...
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Comprehensive knowledge of refrigeration oil
Classification of refrigerant oil One is traditional mineral oil; The other is synthetic polyethylene glycol esters such as PO,Polyester oil is also synthetic polyethylene glycol lubricating oil.POE oil can be used not only in HFC refrigerant system, but also in hydrocarbon refrigerant.PAG oil ca...
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Characteristics of commonly used refrigerants
1.Refrigerant R22: R22 is a kind of temperature, its standard boiling point of 40.8 ° C, water solubility in the R22 is very small, and mineral oil dissolve each other, R22 does not burn, nor the explosion, toxicity is small, R22 searches ability is very strong, and leaks are difficult to find. R...
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10 Common Failures In Refrigeration Systems
Liquid returns 1. For the refrigeration system using expansion valve, the return fluid is closely related to the selection and improper use of expansion valve.Too large selection of expansion valve, too small overheat setting, improper installation method of temperature sensing package or...
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