# compressor power calculation formula

### Compressor power calculation Centrifugal, rotary

1. Formula : compressor power calculation. For 1 compressor stage, the isentropic compression is the following :. P is = 2.31*(k/(k-1))*(T dis-T suct)/M*Q m. A compression is said isentropic when it is carried out by an ideal compressor, without friction, without

Get Price### Centrifugal Compressor Power Calculation

Centrifugal Compressor Power Calculation using Process Simulator. By using process simulator, we get power requirement 0.589 hp, which is slightly below calculation. But overall, the method is correct. I think I spend too much time calculating power requirement using both adiabatic approach and polytropic approach. So, it is better to use adiabatic approach only if you are sure enough with the

Get Price### Reciprocating Compressor Calculation

Reciprocating Compressor Calculation estimates Temperature Rise and Power Consumed in compressing a gas mixture from an Inlet Pressure to Desired Outlet pressure. CheCalc stone engineering calculations to assist process, plant operation and maintenance engineers.

Get Price### Horsepower-calculator United States J-W Power Company

J-W POWER COMPANY. The Power to Perform. Horsepower Calculator The following calculation method uses the Gas Processors Suppliers Association Engineering Data Book Eleventh Edition, FPS Version, 1998, eq 13-4 developed for large slow speed (300-450 RPM) compressors with SG = 0.65 and having CR > 2.50. Discharge temperature based on eq 13-18 assuming 130 Deg F inlet and k of 1.3

Get Price### Air Compressor Calculations Air Compressor Efficiency

Simple Energy Formula: Motor Efficiency = Cost per KW X .746 (Power Factor) X Hours of operation X Brake horsepower *Note: No electric motor is 100% efficient, most will average 92-95% efficient. PSI VS.

Get Price### Horsepower required to Compress Air

Online air compressor horsepower calculator . Sponsored Links . The horsepower required to adiabatic compression of air can be calculated with the calculator below: N number of stages . V volume flow of compressed air at atmospheric pressure (cfm, ft 3 /min) k adiabatic expansion coefficient. P 2 absolute final pressure (psi) Theoretical horsepower required to compress one cubic foot

Get Price### Rotary Screw Compressors Discussion And Calculations

Rotary Screw compressors are fast replacing piston type reciprocating compressors all over the world. With advancement in technology of precision machining the helical screws required in screw compressors, they are becoming the first choice for selection where otherwise a piston reciprocating compressor would have been used in earlier days.

Get Price### METHOD OF CALCULUS FOR THE POWER INPUT OF THE HELICAL

2.1. The helical screw compressor power determination by calculus diagram The powers configuration and energy losses for the compressor are showed by surfaces in Fig. 2: Fig. 2. Helical screw compressor power configuration [6] If the compression is

Get Price### Natural gas compression performance calculations

Capacity & power calculations Compressibility factor, Z, is: (14) Z is due to gases deviating from ideal gas law. Z = V actual/V ideal Power Requirements For isentropic compression & efficiency: (15) is the mass flow rate; z avg is the average of the inlet & outlet compressibility factors 20 = Pv Z RT m

Get Price### Power Calculation 2 University of Sussex

Power Calculation 2. Design Studies Compressor Design (Example 5): Specifications: 35cfm free air delivered. Output pressure 6.895 Bar. Intake air 0.97 Bar 27°C (Assume there is an intake pressure drop and intake air has been ‘warmed’ up by the hot cylinder) Driven at 500 rev/min Clearance 5% of the swept volume Polytropic index n=1.3 Bore-stroke ratio: 2:3 Free air delivered conditions

Get Price### Compressor Calculation Spreadsheet LAOBING KAISUO

Free templates compressor power calculation spreadsheet, centrifugal compressor power calculation spreadsheet, compressor efficiency calculation xls, compressor calculation spreadsheet, centrifugal compressor calculation spreadsheet, centrifugal compressor performance calculation excel, compressor efficiency calculation formula, centrifugal compressor calculation spreadsheet

Get Price### Natural gas compression performance calculations

Capacity & power calculations Compressibility factor, Z, is: (14) Z is due to gases deviating from ideal gas law. Z = V actual/V ideal Power Requirements For isentropic compression & efficiency: (15) is the mass flow rate; z avg is the average of the inlet & outlet compressibility factors 20 = Pv Z RT m

Get Price### Compressor Calculations: Rigorous Using Equation of

In this tip of the month (TOTM) we will present the compressor calculations of a case study. We will compare the rigorous method results with the values from the short cut methods. The rigorous method is based on an equation of state like the Soave-Redlich-Kwong (SRK) for calculating the required enthalpies and entropies. The enthalpies and entropies are used to determine the power requirement

Get Price### Engineering: Compressor Power Calculation

HP or kW = power Flow Calculations Most common compressor flow conditions are often expressed in: 1. Weight flow-lb/min, lb/h (kg/min. kg/h) 2. SCFM-60°F. 14.7 psia and dry 3. number of mols/h None of these flows can be used directly in calculating compressor performance. All must be converted to ACFM-actual cubic feet per minute.

Get Price### Example problems for the calculation and selection of

Now we can use the formula for the calculation of a piston compressor throughput: Q = λ · z · F · s · n. Here z is a coefficient depending on the number of suction lines of an individual piston. Since we have a double-action compressor, z is equal to 2. Besides, since this is a three-cylinder compressor, i.e. three cylinders are operating in parallel, the total throughput of the entire

Get Price### Case-19 Centrifugal Gas Compression Calculation

compression calculation is for compressor selection which is used for gas other than halocarbon refrigerants. The compressor can also be used for the application such as mixed hydrocarbon gas compression or transmission. The case is to demonstrate how to handle the application which is involved with gas compression.

Get Price### RECIPROCATING COMPRESSOR Design and selection

Calculation Formula 9 Appendix A. Size, Efficiency and Losses 11 Appendix B. Gas Properties 14 Appendix C. Compressor Control 19 Page : 1 . RECIPROCATING COMPRESSOR I. PURPOSE To be used for selection, application into the system, power and cooling water estimation. This manual does not for designing reciprocating compressor and the related parts. II. SYMBOLS AND UNIT Designation

Get Price### How to Calculate the Electrical Cost of an Air Compressor

Calculate the compressor's power consumption. The wattage rating is usually stamped on the motor's metal nameplate. In instances when only the amperage rating is given, determine watts used by multiplying the voltage by the number of amps. For a compressor operating on standard household current, the voltage is 110. Heavy-duty compressors operate on 220-volt current and require special

Get Price### How to Estimate Compressor Efficiency? Campbell Tip of

The power calculation should be made per stage of compression and then summed for all stages connected to a single driver. The step-by-step calculation for shortcut method . a. Calculate the isentropic exponent (k) by Equation 3 using the average temperature defined by T = (T 1 +3T 2)/4. This form of average temperature was defined to obtain better match between the rigorous and shortcut

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