Sponsored Links Physical properties of some common refrigerants:
| Refrigerant No. | Name | Molecular Mass | Boiling point at atmospheric pressure 14 ... | Freezing Point at atmospheric pressure 1 ... |
| Temperature (oF) | Pressure (psia) | Specific Volume (Cu.Ft./lb.) | ||
| R-10 | Carbontetrachloride | 153.8 | 170.2 | |
| R-11 | Trichlorofluoromethane 1) | 137.37 | 74.9 | -168 |
| R-12 | Dichlorodifluoromethane 2) | 120.91 | -21.8 | -252 |
What are the properties of refrigerants and its application?
Refrigerants are widely used in Refrigeration cycle where cooling effect below the atmospheric temperatures are needed. Whenever we choose them for particular use Properties of Refrigerants also plays a vital role in economic and environmental friendly application.
How are refrigerants classified according to flammability?
Refrigerants are classified according to flammability by ASHRAE Standard 34 & ISO 817 following test protocols under ASTM E681: (1- no flame propagation, 2L – lower flammability, 2- flammable, 3- higher flammability)
What are the properties of 134a refrigerant?
Refrigerant (R-134a) Properties, Uses, Storage, and Handling. Freon™ 134a Refrigerant 3 Table of Contents ... Critical Density kg/m3 lb/ft3 515.3 32.17 Density (Liquid) at 25 °C (77 °F) kg/m3 lb/ft3 1,206 75.28 Density (Saturated Vapor) at Boiling Point kg/m3 lb/ft3 5.25 0.328
What are the properties of refrigerants used in vapor compression cycle?
Properties of Ideal Refrigerants used in Vapor Compression Cycle. Refrigerants are the life blood of the vapor compression system. The refrigerant flows continuously through the vapor compression cycle, absorbing the heat in the evaporator and releasing it in the condenser.
What are the four properties of refrigerant?
Properties of a good refrigerants:Low boiling Point.High Critical Temperature.High latent heat of vaporisation.Low specific heat of liquid.Low specific volume of vapour.Non-corrosive to metal.Non-flammable.Non-explosive.More items...•
Which is the desirable physical property of refrigerant?
Solution(By Examveda Team) Low Condensing Pressure.
What are the chemical properties of refrigerant?
Chemical propertiesShould be non-flammable.Should be non-explosive.Should be not-toxic.Should not react with lubricating oil.Should not react with moisture.Should not contaminate the food materials kept inside the refrigerating system.
Which is the desirable physical properties of refrigerant Mcq?
The desirable properties of an ideal refrigerant are: Low boiling point. Low freezing point. High critical temperature.
What are thermodynamic properties of refrigerant?
Reliable thermodynamic properties of refrigerants such as pressure, temperature, specific volume, enthalpy and entropy, are required for refrigeration equipment selection and design.
What qualities would you look for in the refrigerant?
There are five major factors that design engineers must consider in selecting a refrigerant for a particular application: performance, safety, reliability, environmental acceptability, and simple economics.
What are the properties of a refrigerant?
Desirable properties of an Ideal Refrigerant : A refrigerant is said to be ideal if it has all of the following properties: 1. Low boiling and freezing point, 2. High critical pressure and temperature, 3. High latent heat of vaporization, 4.
How to identify refrigerant?
Designation System For Refrigerants : 1 The refrigerants are internationally designated as ‘R’ followed by certain numbers such as R-11, R-12, R-114, etc. A refrigerant followed by a two-digit number indicates that a refrigerant is derived from methane base while a three-digit number represents ethane bases. 2 The numbers assigned to hydro-carbon and halo- and refrigerants have a special meaning. The first digest on the rightist the number of fluorine (F) atoms in the refrigerant. The second digit from the right is one more than the number of hydrogen (H) atoms present. The third digit from the right is one less than the number of carbon (C) atoms, but when this digit is zero, it is omitted. 3 The general chemical formula for the refrigerant, either for methane or ethane base, is given as CmHnClpFq in which n + p + q = 2m + 2
What does a refrigerant number mean?
A refrigerant followed by a two-digit number indicates that a refrigerant is derived from methane base while a three-digit number represents ethane bases.
What is the refrigerant that takes part in the refrigeration cycle called?
Primary Refrigerant :-. The refrigerant which takes part in the refrigeration cycle is known as the primary refrigerant . The refrigerants which directly take part in the refrigeration system are called primary refrigerant .
What is secondary refrigerant?
Secondary Refrigerant. 1. The refrigerants which are first cooled by primary refrigerant and then used for cooling purpose are called as secondary refrigerant. 2. Secondary refrigerants allow the amounts of environmentally harmful primary refrigerants to be minimized and contained in a restricted area. 3.
Why are refrigerant materials discarded?
Most of the early refrigerant materials have been discarded for safety reasons or for lack of chemical or thermal stability . In the present day, many new refrigerants including halo-carbon compounds, hydrocarbon compounds are used for air-conditioning and refrigeration applications.
What is the chemical used in a cooling mechanism?
Refrigerant is chemical used in a cooling mechanism, such as an air conditioner or refrigerator, as the heat carrier which changes from gas to liquid and then back to gas in the refrigeration cycle.
