How do I know what size compressor I need for my fridge?

How do I know what size compressor I need for my fridge?

For freezers, 18 hour run time is usually acceptable. Tech Tip: Hourly load for compressor sizing is simply the 24-hour load divided by the selected run time. For example, if 18 hours run time is selected: 890,514 BTU ÷ 18 hr = 49,473 BTU/hr.

What is the capacity of refrigerator compressor?

Refrigerator Compressor, Capacity: 180-400 Ltr.

How many horsepower is my refrigerator compressor?

Re: compressor horsepower They are very safe.

How many CFM is a fridge compressor?

Typical fridge compressors are 100 – 300 watt units, deliver 0.7 – 1 CFM of air and can reach pressures over 500 psi.

How do I know what size compressor I need?

Theoretical capacity of compressor is defined by geometric measurement of air in the working area during one suction period. Then this volume is multiplied by the number of periods (cycles) per time unit.

How do I know how many amps my compressor is?

According to Underwriters Laboratories, divide the MCC by 1.56 to determine the Rated load Amperage (RLA). Often, compressor manufacturers will divide the MCC by 1.44 to determine the RLA of their compressors to meet certain other protection specifications. Compressor Amperage Data.

How do you size a compressor?

The general formula used to calculate this is expressed as compressor time on/ (time on + time off) = Duty Cycle percentage. For example, if a compressor is said to use a 100% duty cycle, that would mean that the compressor provides 25 CFM and 125 PSI for 100% of the time it is in use.

How much PSI does a fridge need?

While at the highest temperature it should be 57 pounds per square inches that is 60-20,40 degrees Fahrenheit. The normal running pressure that 134a has ranged between 22 and 57 psi.

Which oil is used in refrigerator compressor?

Polyolester oil (POE oil) is a type of synthetic oil used in refrigeration compressors that is compatible with the refrigerants R-134a, R-410A and R-12.

How do I know what tonnage my compressor is?

Divide the number listed by 12,000. This will tell you how many tons your HVAC compressor is. For example, if the BTU number listed is 36,000, divide it by 12,000 and you’ll see that you have a 3 ton unit.

What is compressor capacity?

Compressor capacity can be defined as the amount of air the unit is able to pump out. While a small and large compressor can have the same pressure capabilities, the larger model has a greater capacity to produce more compressed air. Capacity is expressed in terms of cubic feet per minute (CFM).

How big of a compressor do you need for a full size fridge?

01) full size refrigerator: compressor probably about 1/8 – 1/6hp. 02) full size refrigerator freezer combo: compressor typically 1/6 – 1/3hp. 03) chest freezer: compressor typically 1/4 – 1/2hp. 04) full size freezer: compressor typically 1/5 – 1/3hp. 05) mini fridge: compressor range 1/20 – 1/8hp.

How are compressor ratings related to cooling capacity?

Compressor capacity is expressed in cubic feet per minute (CFM) or cubic feet per hour (CFH). Because the CFM or CFH rating is directly proportional to the cooling capacity of the compressor, a higher rating indicates a higher cooling capacity.

How can I find out what refrigerant I need for my compressor?

The easiest way to find out the refrigerant required is to check the compressor’s label or specifications. Additionally, EPA’s Significant New Alternatives Policy (SNAP) provides information about the refrigerants approved for use in the United States.

What should the compressor shaft power be for refrigeration?

If it can handle refrigerants then choose a refrigerant which suits to its suction and discharge condition. Now, coming to capacities, if compressor shaft power is ‘P’ kw then evaporator capacity should be about ‘4P’ kw and condenser capacity shall be ‘5P’ kw for cooling application. For freezing application it shall be ‘2P’ and ‘3P’ respectively.