Harsh Bardhan

Hydrocarbons are refrigerants that can be used as an alternative to fluorocarbon refrigerants in some refrigeration and air conditioning applications. The term ‘Hydrocarbon’ encompasses following:  A) Ethane (R170)  B) Propane(R290)  C) Butane (R600)  D) Isobutane (R600a)  E) Propylene (R1270) Properties 1) Hydrocarbons are highly flammable. 2) They have a low toxicity. 3) Hydrocarbon refrigerants are fully compatible with nearly all lubricants commonly used     in refrigeration and air conditioning systems. One major exception to this rule is     lubricants containing silicone and silicate. Comparison with HCFC 1) HVAC professionals have made a comparative study on the performance of hydrocarbon     refrigerants R290, R600a and R1270 with that of HCFC refrigerant R22 and found that in     comparison to R22, hydrocarbon refrigerants have similar or better ability. 2) An experiment o...

The use of Carbon dioxide (R744) as a refrigerant declined for a number of reasons, including changes in technology and the introduction of fluorocarbon refrigerants, which were seen as ‘safety refrigerants’. Properties A) Carbon dioxide has an ozone depletion potential (OPD) of zero and a global warming      potential (GWP) of 1. B) It is generally regarded as a cheap and easily available refrigerant, and many regard      it as an ideal refrigerant. C) Carbon dioxide is non-toxic. It has low toxicity and is non-flammable. D) Carbon dioxide is colorless, odorless and is also heavier than air.If enough carbon      dioxide builds up in an enclosed space it will begin to displace oxygen and can cause      asphyxiation in anyone present within the space. As carbon dioxide is colorless and      odorless, a person in the space will not be able to tell unless proper detectors and ...

Most of the refrigeration and air conditioning equipments in the world today uses fluorocarbon refrigerants to facilitate the heat transfer process. Fluorocarbon refrigerants are synthetic chemicals which causes a high global warming potential, and are a greater threat to the ozone layer as well if released to the atmosphere. There are alternatives to these HFC's that can help to mitigate some of the environmental risks.These are called ‘natural’ refrigerants because the substances also occur in nature, these alternatives are:    1) Ammonia,                                                   2) Carbon Di Oxide    3) Hydrocarbons    Ammonia (R717)    Ammonia is a naturally-occurring substance t...

EPS often called as Thermocol is designed keeping in mind the excellent thermal insulation and low cost.When assembled inside the window air conditioner it gives an excellent mechanical fastening to the partition plate and evaporator.Usually the density of the designed components is kept at 30 kg/cu.m and the granular size is 5 mm.