Table of Contents
How do you calculate refrigerant effect?
Refrigeration Formulas
- Compression Work. Compressor work can expressed as.
- Compression Horsepower. Compression horsepower can be expressed as.
- Compression horsepower per Ton. p = 4.715 / COP (2c)
- COP – Coefficient of Performance. COP = NRE / h (3)
- Net Refrigeration Effect.
- Capacity.
- Compressor Displacement.
- Heat of Compression.
What is pH diagram of refrigeration cycle?
A p-h diagram is a figure with a vertical axis of absolute pressure and a horizontal axis of specific enthalpy. It is an important diagram used frequently for a performance calculation of a refrigerating machine.
What does PT chart mean?
pressure-temperature
The pressure-temperature (PT) chart is a valuable tool that service technicians use to check proper system operation. Traditional PT charts list the saturated refrigerant pressure, in psig, with a column for temperature down the left side.
How do you calculate refrigerant and cooling capacity?
Using the energy equation of Q = ṁ x Cp x ΔT we can calculate the cooling capacity. We add 273.15K to the celcius to convert it to units of Kelvin. The Specific heat capacity (Cp) is measured in units of kJ per kg per Kelvin. This gives us a final answer of Q = 2,500kW of cooling.
How do you read a pH chart?
Each number represents a 10-fold change in the acidity/basicness of the water. Water with a pH of five is ten times more acidic than water having a pH of six. As this diagram shows, pH ranges from 0 to 14, with 7 being neutral. pHs less than 7 are acidic while pHs greater than 7 are alkaline (basic).
How do I read the refrigerant flow diagram?
The Refrigerant Flow Diagram can be very simple and it also can be expanded to P&ID (Process and Instrumentation Diagram) if required. The Refrigerant Flow Diagram is to be read in conjunction with the P-H Diagram to get the entire picture of the system.
What is the dryness fraction of refrigerant?
Dryness fraction of Refrigerant to be compressed at entrance of compressor. It has to be increased, as dryness fraction denotes the amount of vapour refrigerant present in mixture of liq and dry vapour refrigerant. Dryness fraction can be increased by using a superheating the vapour refrigerant before entering the compressor.
How to design industrial refrigeration system?
Industrial refrigeration system design starts from P-H Diagram Refrigeration Cycle Analysis and Refrigerant Flow Diagram: (1) P-H Diagram Refrigeration Cycle Analysis. P-H Diagram is to analysis the feasibility of the refrigeration cycle, to calculate the thermodynamic properties of the refrigeration system.
What are the factors affecting the refrigeration effect of a compressor?
It has to reduced for more Refrigerating effect. It can be reduced by using a sub cooler. Dryness fraction of Refrigerant to be compressed at entrance of compressor. It has to be increased, as dryness fraction denotes the amount of vapour refrigerant present in mixture of liq and dry vapour refrigerant.