What is the head of compressor?
What is the head of compressor?
Head. Head is simply the work expressed in foot pounds per pound of gas or N-m/kg. At a given compressor speed and capacity, the head developed by a centrifugal compressor is the same regardless of the nature of the gas being compressed.
How do you measure a compressor head?
If the compressor head curve and efficiency curve are provided by the manufacturer, the head is determined from the actual gas volume rate at the inlet condition. Second, from the head, the actual work, discharge pressure and finally the discharge temperature are calculated.
How do you find the polytropic head of a compressor?
Units of Polytropic Head – The polytropic head can be expressed in ‘metres’ or ‘kJ/kg’ or ‘N.m/kg’. The conversion is 1 kJ/kg = 102.04 m. Therefore in this case the compressor head which was calculated as 173.7 kJ/kg is 17,720 m.
What is the polytropic head?
The Polytropic Head is an expression used for dynamic compressors to denote the foot-pounds of work required per pound of gas. That’s all that the Polytropic Head represents. Its definition/concept is that straight forward.
What is compressor efficiency?
The compression efficiency is the ratio of the work required to adiabatically compress a gas to the work actually done within the compressor cylinder as shown by indicator cards (Figures 18-12 and 18-16). The heat generated during compression adds to the work that must be done in the cylinder.
What are the parts of compressor?
Compressor Parts:
- Cylinder Head,
- Suction/ Intake valve,
- Delivery valve,
- Cylinder liner/ Wall/ cooling water jacket,
- Compressor casing,
- Crank case,
- Piston,
- Connecting rod,
How is compressor work calculated?
For compressors work is calculated by dividing the enthalpy difference (Δht), from (8), by a mechanical efficiency ( η m c = 97 % ) . Polytropic head (Δhp) is calculated using the difference in entropy (ΔS) and temperature (ΔT), as shown in (9).
What is the efficiency of compressor?
What is small stage efficiency?
The polytropic or small stage efficiency of a compressor is defined as the ratio of the actual differential work done on the fluid to the isentropic differential work done on the flowing through the compressor Consider an ideal gas with constant specific heats as the working fluid undergoing a process in a compressor …
How do I check my 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. BHP (Rule of thumb): For every 1 PSIG pressure drop, BHP (Brake horsepower) goes down ½ %.
What are the parts of a compressor?
A compressor consists of two components: the power source and the compressing mechanism (piston, vane, etc.). In the case of an air compressor, the compressing mechanism is in fact compressing the atmospheric air.
What is a 2 stage compressor?
A two-stage air compressor is a heavy-duty air compressor that uses two cylinders. An air compressor is a device that increases the amount of air in a confined space. Confined air builds pressure and generates power for industrial, commercial and personal uses. The two-stage air compressor comes with two pistons .
What is the function of compressor?
Compressor’s Function. The compressor is the heart of the cooling cycle. The cycle begins when the compressor draws in cool, low-pressure refrigerant gas from the indoors. The motor-driven compressor’s sole function is to “squeeze” the refrigerant, raising its temperature and pressure so that it exits the compressor as a hot, high-pressure gas.
What is an air compressor head?
Compressor Head Sales and Repair from Compressed Air System. The compressor head is one of the vital components of your compressor. In conjunction with the compressor’s motor, it is the enginethat drives the entire mechanism.