The European F-gas regulations bans do not currently place restrictions on R134a in chillers, but with the phase-down being based on CO2 equivalents there is a drive to find lower GWP refrigerant alternatives. With R134a having GWP of 1300, Johnson Controls, along with other chiller manufacture...
Several T-type thermocouples were inserted in the wall to measure the temperature distribution during the phase-change process. In particular, the experimental measurements were carried out at constant saturation temperature of 30掳C, by varying the refrigerant mass velocity between 190kg m2 s1 and ...
Motor protection:Voltage-loss protection, phase-loss protection,inverse phase protection and over-heat protection.Anti-freezing protiction:The unit will stop running in case of excessively low cooling water temperatureSafety valve protection:when the refrigerant pressure exceeds a certain value...
UK: The UK government’s Environmental Audit Committee (EAC) has announced a new enquiry into the risks and impacts of PFAS substances in the UK. Cooling Post is the leading online resource covering latest news and developments in the cooling industry. This includes: refrigeration news, air cond...
in the EU production will be completely phased out by 2010, USA a 90% phase out by 2015. Also end use controls are being introduced e.g. production of new equipment has already been banned in the EU and in the USA R22 will be banned for use in new equipment from January 1 2010. ...
The newly proposed model takes into account the presence of liquid in de-superheating and sub-cooled liquid in two-phase zone. The model has been developed independently and compared to experimental data for R134a, R1234ze(E) and R32 for mass fluxes of 100-300 kgm-2s-1, saturation ...
The results confirmed that R430A is found to be a good drop-in substitute to phase out R134a in domestic refrigerator servicing sectors.doi:10.1177/0954408918796369M MohanrajSAGE PublicationsSage UK: London, EnglandJnl of Process Mechanical Engineering: Part E...
1. "D" means single phase power supply,"H" means heat pump type; 2. Nominal cooling condition: outside air temperature DB35ºC/WB24ºC, chilled water temperature 12/7ºC; 3. Nominal heating condition: ambient air temperature DB7ºC/WB6ºC, inlet/outlet wate...
The recent international trend, according to the Montreal Protocol, seeks to phase-out all hydrochlorofluorocarbons because of their deteriorating effects on the ozone layer. Many alternative refrigerants that are harmless to the ozone layer, such as liquefied petroleum gas (LPG) and R134a can be ...