Refrigerant Gas Pakistan are categorized into classes based on their chemical makeup. These chemical compounds are being replaced with more eco-friendly ones when it was discovered that some of them may be bad for the environment. Although there are replacements to the old refrigerants the new ones are typically not perfect and the process is not simple. Different categories of refrigerants are addressed some examples are provided and their areas of application are detailed in the section that follows.
Chlorofluorocarbons are Refrigerant Gas Pakistan that contain chlorine. Because of their harmful impacts on the environment they were banned in the 90s. CFCs R11, CFCs R11 R12 and R115 are two examples. The transition of CFC by using machines and systems hasn’t been completed. However there is an thriving industry for the refrigerants across the globe and it is estimated that just 50 percent of CFC systems have been repaired.
Hydrochlorofluorocarbons or HCFC
The sluggish phase out of CFCs demonstrates how expensive the process is. It also demonstrates the issues and ambiguity surrounding the supply of HCFCs which were officially designated as temporary (until 2030) replacements for CFCs. The hurried actions of the European Union that led to the immediate ban on HCFCs for refrigeration and the impending ban on HCFCs for air conditioning (by 2004 at the latest) have disrupted industrial plans and programmer.
Because they have less chlorine than CFCs, HCFCs have a lower ODP. R22, R123, and R124 are a few hydrochlorofluorocarbons as examples.
Hydrofluorocarbons or HFC
The Refrigerant Gas Pakistan known as hydrofluorocarbons don’t contain chlorine and don’t deplete the ozone layer. However as compared to conventional refrigerants, they have a much greater influence on global warming. Because HFCs have been banned, the most popular HFC refrigerants are now available.
The following are some remarks on the refrigerants included in the table:
Rarely utilized as separate refrigerants, R32 and R125 are only combined when the thermodynamic qualities are extremely favorable. Almost solely and in an experimental manner, R245c and R245fa are utilized in the US. For refrigerators and freezers R502 has been replaced with R404A.
Due to the fact that it essentially necessitates no modifications to the equipment developed for R22, R134a was the first HFC deployed in refrigeration and air conditioning with tremendous success. Its efficiency nevertheless, is incredibly low—about 40% lower than what can be achieved with R22. The manufacturer therefore has two options either accept a significant drop in the thermal capacity of a particular system or raise its dimensions (and price) to obtain the same capacity. Due to the higher price R134a is mostly employed in large systems (those with a capacity of more than 250 kW).
Like R134a R407C is thermodynamically comparable to R22 and can be used as a “drop in” refrigerant. R407C, on the other hand, has a glide of 7 K which makes it hardly useable in tiny domestic (home) equipment in contrast to R134a, which is a pure compound. Residential equipment is more vulnerable to unexpected accidental losses than other equipment and it is typically serviced on site, both of which serve to justify such a restriction. A 7K glide may cause the mixture’s proportions to shift in the case of a sudden leakage since the proportional losses of its most volatile components will be disproportionately high.
Higher energy efficiency
There is no guarantee that the fresh refrigerant mixture will have the same ratios as the one it did before to the leakage if a typical refill is utilized. This refrigerant is only used in medium-capacity systems (50–250 kW), which are often serviced by qualified workers because to its high glide. Since R410A doesn’t glide and has a higher energy efficiency than R22 there is no issue with the mixture remaining after charge loss and refill. It does however operate at a pressure that is almost double that of R22, necessitating a rebuild of the entire system to accommodate larger compressors expansion valves etc.
Successful applications of R507A in commercial and industrial refrigeration. Low temperature cycles employ R508B less frequently. Because they are azeotropic mixes, R507A and R508B have good thermodynamic characteristics and no issues with temperature glides.