Himanshu

Topics: Chlorofluorocarbon, Ozone depletion, Refrigerant Pages: 8 (1655 words) Published: June 22, 2014
SEN700 –Research Methodology

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I certify that the attached work is entirely my own (or where submitted to meet the requirements of an approved group assignment is the work of the group), except where work quoted or paraphrased is acknowledged in the text. I also certify that it has not been submitted for assessment in any other unit or course. I agree that Deakin University may make and retain copies of this work for the purposes of marking and review, and may submit this work to an external plagiarism-detection service who may retain a copy for future plagiarism detection but will not release it or use it for any other purpose. Hydrocarbon Refrigerants

NAME: HIMANSHU BABBAR
ID: 213359906
UNIT CODE: SEN700
Assignment 1
DUE DATE: 06/04/2014

INTRODUCTION
What is the first thing that comes to the mind when the temperature outside goes high?? Switching on the air conditioner and beat the heat. But has anyone ever wondered about how these air conditioners are working and producing such a cooling effect and do they have any effect on our environment or not?. Well, all these air conditioners, refrigerators that we uses in our households, shopping malls and even in our vehicles uses refrigerants that help in achieving the desired cooling. Refrigerants are the fluids which undergoes the refrigeration cycle by absorbing heat from one source and rejecting into another.

There are many refrigerants like CFC’s (Chlorofluorocarbons), HCFC’s (Hydro chlorofluorocarbons), HFC’s (Hydro fluorocarbons), and FC’s (Fluorocarbons) that are currently in use. Some of them may be banned but some are still in use. All these refrigerants that are in use are not good for our environment due to their chemical properties. They are harmful for the environment due to their toxic nature, ozone depletion potential (ODP) and global warming potential (GWP). Well the solution for these refrigerants are Hydrocarbon refrigerants which are basically called as natural refrigerants with non-toxic in nature, zero ozone depletion potential and very low global warming potential.

This report examines the problem areas related to the use of the refrigerants and also the existing solutions that are currently present for the ideal use of these refrigerants.

HYDROCARBON REFRIGERANTS
Hydrocarbon refrigerants are naturally occurring refrigerants which are nontoxic, have zero ozone depletion potential and very low global warming potential. The five most efficient natural refrigerants present in the world are Air, water, carbon dioxide, ammonia and Hydrocarbon refrigerants which are also known as The Famous Five. All the existing refrigerants that are in use nowadays will be phased out in the coming time, so why going for something new when there is an option available through nature [1].

During 1970s scientists researched that there are certain chemicals which could damage the earth’s protective layer called ozone layer. And it was further proved to be right when the ozone layer over Antarctica was thinning and forming ozone hole. Due to which there was an increase in the ultraviolet radiation which have very serious consequences in humans like skin damage, eye damage, and effects on immune system. Because of these results leaders form many countries formed a treaty called the Montreal Protocol. Their main aim was to eliminate the use of man-made chemicals that was affecting the ozone layer and it was then the CFC’s and HCFC’s was phased out and was banned to use since they contain chlorine in it which is not friendly to ozone layer [2].

The use of CFC’s (Chlorofluorocarbons) and HCFC’s (Hydro chlorofluorocarbons) mainly R12 and R22 was eliminated after the Montreal protocol project due to its ozone depletion potential. Which resulted the manufactures to again design their products for the HFC’s (Hydro fluorocarbons) refrigerants R134a, R404a, R410a etc. [3]. These...

Bibliography: [1] Engas Australasia. (Undated). [Online]. Viewed 2014 April 2. Available : http://www.engas.com.au/About-Hydrocarbon-Refrigerants.php
[2] U.S. Environmental Protection agency. (2010, August). [Online]. Viewed 2014 April 2. Available : http://www.epa.gov/Ozone/basicinfo.html
[3] Vtech Cool Innovation. (Undated). Hydrocarbon Refrigerants: Alternatives to HFC’s. [Online]. Viewed 2014 April 2.Available: http://www.vtechonline.com/pdf/News-PDFs/s_6.pdf
[4] R.S. Agarwal. (1998). Hydrocarbon Blends and Blends of HFC-134a-HC600a as Drop in Refrigerants for small Capacity commercial refrigeration appliance – An Experimental study. [Online].Viewed2014April2Available:http://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1386&context=iracc.
[5] March Consulting group. (September 1998). Opportunities to minimize emissions of Hydrofluorocarbons (HFCs) from the European Union. [Online]. Viewed 2014 April 2.Available:http://ec.europa.eu/enterprise/sectors/chemicals/files/sustdev/hfc_study_en.pdf
[6] B. McCarthy. (Undated). R134a Refrigerant – is it really Environmental friendly?. (Online). Viewed 2014 April 2. Available : http://kaojaigreen.com/r134a-refrigerant-is-it-really-environmentally-friendly
[7] Vtech Cool Innovation. (Undated). Hydrocarbon Refrigerants: What’s it Going to be?. [Online]. Viewed 2014 April2.Available:http://www.vtechonline.com/newsletters/fall2012/vtech-enews-fall-2012-alternative-refrigerants.html
[8] Hydrocarbons21 (2014 March). Interest in Hydrocarbons refrigerants hotting up in the US, according to Greenchill webinar. [Online]. Viewed: 2014 April 2. Available: http://www.hydrocarbons21.com/articles/interest_in_hydrocarbons_refrigerants_hotting_up_in_the_us_according_to_greenchill_webinar
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