Microchannels. Modularization. Ruggedness. These are some of the terms being applied to coil and condensing technology. Here are some of the most recent trends based on information supplied to The NEWS.
Digital-based electronics are being used in refrigerant pressure controllers that operate commercial compressor and condenser equipment. This control is said to remove the last, weakest link in all refrigeration and air-conditioning systems that until now have not been digitalized.
In recent years, coil technology has increasingly focused on microchannel. This advanced approach offers a way to improve thermal performance, reduce refrigerant charge, and improve corrosion resistance. The application of this technology originated in the auto industry more than 20 years ago.
In a properly operating system, the refrigerant will be in a superheated state from the last section of the evaporator to the first section of the condenser. Technicians can measure the superheat condition anywhere along this path. One common location is at the outlet of the evaporator.
This article is the first in a series focusing on refrigerants and refrigerant blends. This month’s article will concentrate on the HCFC-22 air conditioning replacement refrigerant blend HFC-410A, better known as R-410A.
There is only one thing you need to know about California: The state loves all things green - especially solar power. Only thing is, when you are a refrigeration contractor, you can do green but how can you harness the hot sun and create cold? According to C&L Refrigeration of Brea, Calif., it can be done and they did it.
The volume of heat pump shipments may be dropping, according to the Air-Conditioning, Heating, and Refrigeration Institute’s (AHRI’s) monthly shipment reports, but that doesn’t mean the units aren’t gaining ground in the industry. The general consensus is that heat pump popularity is increasing.
The HVAC industry is just one sector of the trades conducting work under the roof and within the building envelope of homes and commercial structures. The responsibility for sizing equipment and designing the duct and ventilation systems, however, has been placed solely on the backs of HVAC contractors. When did this happen?
Say “heat pump” around a non-HVAC person, and they’re bound to provide some unpleasant memories. With past problems behind them, however, heat pump sales have begun to rise. They’re not ready to take over the leadership position held by air conditioners, but they’re definitely gaining ground.
When it comes to heat pump equipment, Richard Halbig, sales manager for Robur Corp., thinks that “The introduction of gas-fired absorption heat pumps to the heating and air conditioning industry has been the most profound product development in years.”
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