How is compressor efficiency calculated?
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. BHP (Rule of thumb): For every 1 PSIG pressure drop, BHP (Brake horsepower) goes down ½ %.
How many cylinders does a reciprocating compressor have?
Components of a Reciprocating Compressor A reciprocating compressor uses pistons to compress air. The compressor has a similar design to an internal combustion engine; it even looks similar. There is a central crankshaft that drives anywhere from two to six pistons inside cylinders.
How many strokes are there in the working of a reciprocating compressor?
Compression occurs within the cylinder as a four-part cycle that occurs with each advance and retreat of the piston (two strokes per cycle).
How is compressor capacity measured?
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 is compressor CFM measured?
How Do You Calculate CFM for an Air Compressor?
- Next, convert to standard pressure (ATM).
- Tank Pump-up Time = 1 min 8.4 seconds (1.14 minutes)
- The three primary factors are:
- CFM = Tank Volume in Cubic Feet x Standard Pressure (ATM) During a Cycle x Cranks per Minute.
What is distance piece in reciprocating compressor?
A distance piece is a section of a gas compressor between the crankcase and the compressor cylinder which isolates the two areas from one another. This prevents oil from being transferred up the piston rod into the cylinder area of the compressor.
What is the required condenser and evaporator pressure ratio for reciprocating compressor?
Explanation: Reciprocating compressor is the type of compressor in which vapour refrigerant is compressed by the back and forth motion of the piston. For optimum operation and effective results, the ratio of condenser and evaporator pressure should be greater than 3.5 bar.
What is stroke in a reciprocating compressor?
Reciprocating air compressors consist of a piston driven by a crankshaft enclosed within a cylinder. The typical reciprocating air compressor is also comprised of suction and discharge valves. On the piston’s compression stroke, the volume within the cylinder decreases, raising the pressure of the collected air.
What is the gear ratio of gas turbine driven compressors?
A two-stage epicyclic gearbox with gear ratio of 31:1 steps down turbine shaft speed to the compressor speed of 333 rpm. Triune Energy Services, New Delhi 4. Triune Energy Services, New Delhi 5. Triune Energy Services, New Delhi
How does a gas turbine drive a generator?
Gas turbine driven compressors. The fuel is burned and the resultant hot air- fuel mixture is expanded through turbine blades, making them spin about a shaft. The spinning turbine drives a generator that converts the spinning energy into electricity. Exhaust heat from the gas turbine is sent to a heat recovery steam generator (HRSG)…
Who are the manufacturers of gas turbine compressors?
Gas turbines manufacturers for mechanical drive applications are: GE Alstom Rolls Royce Siemens MAN Turbo Solar Dresser-Rand Mitsubishi Niigata PL ENGINEERING 29. Power Generation Applications and Customers mostly require: Cost of Electricity Ruggedness Cost of Operation & Maintenance (O&M) PL ENGINEERING 30.
How does the output of a gas turbine increase?
Work output of a gas turbine increases with: Higher pressure ratio generated in the compressor Higher combustor exit temperature, normally restricted by the high temperature capability of combustor and turbine components More efficient secondary systems (cooling, sealing) PL ENGINEERING 10.