The studies involve measuring air flow, differential enthalpy across the evaporator coil as well as motor input
power to assess operating Energy Efficiency Ratio (EER) of the individual Air Conditioning Unit.
Measuring the flow with anemometer (vane or hot wire type)
Measuring temperature and relative humidity of the return air to the air conditioning unit with
Hygrotemp Meter
Measuring temperature and relative humidity of the supply air from the conditioning unit with
Hygrotemp Meter
Determining Power with clamp on or plug in type power meter
Computing Cooling Effect delivered by the conditioning unit
Determining Specific Power as well as Energy Efficiency Ratio
Comparing the values with the design data to analyzing the gaps, if any.
Assessing the performance and suggesting ways for improvement, as applicable
Submitting the report
A team of two engineers is deputed to carry out the studies and furnishing the report. The field visit is
typically for 5 to 6 hours; during which up to 16 measurements can be carried out depending upon initial
preparations, type & conditions of units and support from the plant team.
Although not a part of regular assignment, the following parameters of the Outdoor Unit & Compressors can
also be also measured, if possible and requested by the plant
Measuring the exhaust air flow with anemometer (vane or hot wire type)
Measuring ambient temperature with digital thermometer near the outdoor unit
Measuring the exhausts air temperature with digital thermometer
Determining Power with clamp on or plug in type power meter
Computing Cooling Effect delivered by the outdoor unit
Measuring refrigerant pressure at compressor suction with digital pressure gauge
Measuring refrigerant pressure at compressor discharge with digital pressure gauge
Noting refrigerant temperature at compressor suction with digital temperature gauge
Noting refrigerant temperature at compressor discharge with digital temperature gauge
Noting the refrigerant type
Comparing the values with the design data to analyzing the gaps, if any.
Assessing the performance and suggesting ways for improvement, as applicable
Submitting the report
