What is the purpose of secondary refrigerant?
What is the purpose of secondary refrigerant?
Secondary refrigerants allow the amounts of environmentally harmful primary refrigerants to be minimized and contained in a restricted area. Examples of secondary refrigerants include water, air, hydrocarbons, ammonia and carbon dioxide, which are more environmentally benign than traditional refrigerants such as HCFCs.
Which of the following is a secondary refrigerant when used above 0 C?
There is a latent heat transformation for the refrigerants. For e.g. R-11, R-12, R-22, R-134a, R-1150 etc. Secondary Refrigerants: There are working substances which are first cooled by primary refrigerants and then used for cooling at desired places. e.g.H2O, Brine.
What is the difference between primary and secondary refrigerant?
Primary refrigerants are those fluids, which are used directly as working fluids, for example in vapour compression and vapour absorption refrigeration systems. As the name implies, secondary refrigerants are those liquids, which are used for transporting thermal energy from one location to other.
Which fluid is used as secondary refrigerant?
Aqueous fluids as secondary refrigerant Aqueous solutions of ethylene and propylene glycol, ethyl alcohol and chloride salts have long been used as secondary refrigerants. For example, magnesium and calcium chloride water mixtures have been widely used in refrigeration applications since a long time ago.
Where is secondary refrigeration system used?
When used in compression or absorption systems, these fluids provide refrigeration by undergoing a phase change process in the evaporator. As the name implies, secondary refrigerants are those liquids, which are used for transporting thermal energy from one location to other.
What is brine and why is it used?
Brine is a solution of salt in water. Brine is commonly used in large refrigeration installations for the transport of thermal energy from place to place. In colder temperatures, brine can be used to de-ice or reduce freezing temperatures on roads. In cooking, brine is used for food brining and salting.
Where is primary and secondary refrigerant used?
Primary Refrigerants: When used in compression or absorption systems, these fluids provide refrigeration by undergoing a phase change process in the evaporator. As the name implies, secondary refrigerants are those liquids, which are used for transporting thermal energy from one location to other.
Which one of the following is a CFC refrigerant?
Detailed Solution. CFC stands for Chlorofluorocarbon where Chlorine element is present. From above R502 refrigerent have Chlorine element.
What are the desirable properties of refrigerants compare primary and secondary refrigerants?
Non-flammable and non-explosive. Low cost and easily available. Easy to liquefy at moderate pressure and temperature. Easy of locating leaks by odour or suitable indicator.
What is the function of evaporator in RA?
They act as heat collector that pick up heat from the surrounding air and conduct it to the refrigerant inside the tube hence improving the efficiency in cooling the air of the surrounding.
Where is secondary refrigerant invariably used *?
How secondary refrigerant used in ice plants: The usual brines used in freezing tanks are sodium chloride or calcium chloride. sodium chloride is used where the cooling surfaces will not be exposed to damage if freezing occurs, such as on pipe coil coolers and trunk evaporators.
What is brine used for?
Brine is used as a preservative in meat-packing (as in corned beef) and pickling. In refrigeration and cooling systems, brines are used as heat-transfer media because of their low freezing temperatures or as vapour-absorption agents because of their low vapour pressure. Brine is also used to quench (cool) steel.
