Heat Recovery Unit

ARO’s Heat Recovery Units 

An ideal sustainable heat recovery solution for today and tomorrow. ARO’s Heat recovery unit, a type of machinery that uniquely transfers thermal energy from heat source to heat sink Approaches facilities’ requirements with the most efficient solutions. Heat sources are recovered either from fresh air load or waste water source coupled with the compression of refrigerant within the compressor making up the total heating capacity used for sensible reheat in humidity application. The energy recovery function of the HRU is authentically energy saving when compared to convention heating using electrical heaters.

Sensible reheat

HRU system design allows an application to perform sensible reheat from 13 °C Apparatus dew point to a range from 13 °C to 23 °C, build upon the variable where facilities are controlled at 23 °C. The HRU will modulate its capacity control subject to the amount of reheat is required to maintain a supply air temperature of 23 °C for the consistency of the facility’s temperature requirement.

Building CHW Cooling

Heat source is recovered from air source via the on the coil of HRU’s direct expansion coil from outdoor air through the change of state of the refrigerant within the HRU’s refrigerant circuit, the cooling capacity is utilized to perform 
the pre-cooling before building chilled water coil. When HRU modulates down according to the sensible reheat required, cooling capacity from HRU’s refrigerant circuit will also be off loaded, hence to ensure consistency of Appratus dew point 
set point, the modulation action of the PIBCV of the building CHW coil will perform compensation of uploading and downloading.