NDLI: Experimental Investigation of a Pilot Compression Chiller With Alternatives Refrigerants R401a and R134a

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Fatouh, M.
Copyright Year	2005
Abstract	This paper reports the results of an experimental investigation on a pilot compression chiller (4 kW cooling capacity) working with R401a and R134a as R12 alternatives. Experiments are conducted on a single-stage vapor compression refrigeration system using water as a secondary working fluid through both evaporator and condenser. Influences of cooling water mass flow rate (170–1900 kg/h), cooling water inlet temperature (27–43°C) and chilled water mass flow rate (240–1150 kg/h) on performance characteristics of chillers are evaluated for R401a, R134a and R12. Increasing cooling water mass flow rate or decreasing its inlet temperature causes the operating pressures and electric input power to reduce while the cooling capacity and coefficient of performance (COP) to increase. Pressure ratio is inversely proportional while actual loads and COP are directly proportional to chilled water mass flow rate. The effect of cooling water inlet temperature, on the system performance, is more significant than the effects of cooling and chilled water mass flow rates. Comparison between R12, R134a and R401a under identical operating conditions revealed that R401a can be used as a drop-in refrigerant to replace R12 in water-cooled chillers.
Sponsorship	Advanced Energy Systems Division
Starting Page	43
Ending Page	51
Page Count	9
File Format	PDF
ISBN	0791842118
DOI	10.1115/IMECE2005-80496
e-ISBN	0791837696
Volume Number	Advanced Energy Systems
Conference Proceedings	ASME 2005 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2005-11-05
Publisher Place	Orlando, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Water cooled chillers Performance characteristics R401a and r134a Water Compression Temperature Cooling Condensers (steam plant) Vapors Flow (dynamics) Pressure Stress Performance characterization Fluids Refrigeration Refrigerants
Content Type	Text
Resource Type	Article

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