One method of head-pressure control during low ambient conditions is to use a mechanical hold-back or flooding valve located at the outlet of the condenser to hold back or flood liquid refrigerant in the condenser. This valve is often referred to as an open on rise of inlet (ORI) valve because it will start to throttle open on a rise in condenser pressure.
Keeping any kind of air conditioning or refrigeration coil clean is important for proper heat exchange, and microchannel coils are no exception. As these types of coils continue to grow in popularity, technicians should know that the microchannel cleaning procedures can differ from those for cleaning standard fin-and-tube coils.
High demand for condensing units from the commercial refrigeration industry
August 8, 2016
The global condensing unit market is forecast to reach $23.31 billion by 2021, growing at a compound annual growth rate (CAGR) of 11.1 percent from 2016 to 2021, according to a report published by MarketsandMarkets.
While making the decision to replace a condensing unit instead of repairing it may be a difficult one, some contractors have guidelines in place to help homeowners make such a decision a little less difficult.
Dozens of regulations affecting HVACR equipment manufacturers, along with refrigerant regulations and technological innovations in variable-speed technology, have resulted in a bevy of change for condenser unit manufacturers.
The function of coils in heating and cooling systems is to transfer heat from one medium to another, either extracting heat from a building and expelling it outside or vice versa. Depending on the application, different technologies are available to ensure thermal energy is transferred as efficiently and cost-effectively as possible.
One of the main components of any refrigeration or air conditioning system is the condenser. As its name indicates, the condenser condenses refrigerant vapor sent to it from the compressor. However, the condenser also performs other important functions, too.