Dairy Farm Energy Management Handbook phần 2 pps

Equipment Operation and Maintenance

Scroll Compressors

A scroll compressor is about 15 to 20% more efficient than reciprocating

compressors that pressurized the refrigerant gas with a piston assembly.

Scroll compressors have also been used very effectively in other industries for

years with a proven and reliable track record.

Whether you are still using a reciprocating

compressor or a scroll compressor, there are

several maintenance factors to keep in mind.

Have your refrigeration service provider check

the refrigerant level and check for leaks

annually.

The typical, air-cooled condenser units are used for expelling heat from the

refrigerant to the air. Dust, lint, hair, grease and other debris can foul up these

units and increase the energy consumption of the refrigeration system.

The units can be cleaned with a special degreaser specifically made for

condensers. This special degreaser minimizes any affects to the aluminum

and copper bonds in the condenser that transfer the heat to the air.

The degreasing solution is sprayed on, allowed to soak in and then rinsed off

with low-pressure, warm water. Cleaning these units just twice yearly – taking

only twenty or thirty minutes – could save you hundreds of dollars in energy

costs, according to Sanford.

An unpublished study by the University of Wisconsin found a 3 to 5%

reduction in energy use when the air-cooled condenser units are kept

cleaned.

There are also a few other basic steps to follow that can help you reduce

energy costs.

For example, it’s important to open up the vents to the outdoors and clean the

condenser unit when the weather starts warming up in spring. Also, during the

summer, condensers will operate more efficiently and cool better with access

to outside air.

During the winter, the reject or waste heat can often be used to help warm the

milk room.