14-05-2012, 12:34 PM
THE LOW GLOBAL WARMING REFREGERANT
HFO-1234yf-1.pptx (Size: 802.9 KB / Downloads: 41)
INTRODUCTION
HFO-1234yf is introduced by Honeywell and DuPont
HFO-1234yf is a type of fluorocarbon with some advancements(discussed further).
Honeywell undertook several tests on toxicity of this fluorocarbon for e.g. cardiac sensitization, genetic testing, genomic testing or reproductive testing. Results were clear that there is no negative influence on human health.
It has zero ozone layer depletion potential.
The Global Warming Potential of these refrigerant is 4.
NEED OF HFO-1234yf
CO2 was used as the refrigerant earlier.
R-134a then came into existence due to its low environment harming potential.
But due to the GWP of R-134a being 100 it needed to be replaced.
Thus from 1 January 2011 onwards the European Nations decided to use HFO-1234yf
as a refrigerant due to its higher energy efficiency and improved Life Cycle Climate Performance.
Why not R134A?
By 2016 the EPA is
requiring a corporate
fleet average of less than
250 g/mile of CO2
requirement
A lower GWP refrigerant
equals emissions credit
for the manufacturer’s
fleet
Critical Temperature:
The critical temperature measurement was done by collecting the twenty two data points for the saturated vapour for HFO-1234yf near the critical point.
The experimental uncertainties of the temperature measurement are estimated to be within 5mk.
On the basis of the experiment the critical temperature was observed to be 367.85+or-0.001k.