![Sanden Eco Heat Pump] Why employ R744 (CO2 ) refrigerant](/sites/default/files/inline-images/%5BSanden%20Eco%20Heat%20Pump%5D%20Why%20employ%20R744%20%28CO2%20%29%20refrigerant_0.jpg)
Eco-Friendly - Why employ R744 (CO2 ) refrigerant?
✅ It offers no ozone layer depletion and minimal global warming (ie. as per table below) versus other commonly used refrigerants, should the system leak.
✅ It performs higher compression efficiency, with lower energy consumption, thereby allowing more heat to be transferred to the water, for less energy used (i.e. excellent thermodynamic ability).
✅ The refrigerant temperature gets very hot, very quickly, so water temperature of 65ºC, is achieved almost instantly.
✅ Sanden is the only currently available HWHP in Australia, to employ “ozone friendly” R744 (CO2) refrigerant.
| Refrigerant ASHRAE Number | IUPAC Chemical Name | Net GWP per 100 years |
|---|---|---|
| R744 | Carbon Dioxide | 1 |
| R12 | Dichlorodifluoromethane | 10,900 |
| R22 | Chlorodifluoromethane | 1,810 |
| R134a | 1,1,1,2-Tetrafluoromethane | 1,430 |
| R410a | R32/R125 (50/50) | 2,087.5 |
Global warming potential (GWP)
Global warming potential (GWP) is a measure of how much a given mass of greenhouse gas is estimated to contribute to global warming. It is a relative scale which compares the gas in question to that of the same mass of carbon dioxide (whose GWP is by convention equal to 1). A GWP is calculated over a specific time interval and this time interval must be stated whenever a GWP is quoted or else the value is meaningless.
See also:
https://en.wikipedia.org/wiki/Global_warming_potential
https://en.wikipedia.org/wiki/List_of_refrigerants
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