Jersey Shore School District modifies (2) large air handling units to utilize VRF heat pump technology as part of comprehensive design-build ESCO project
HRG served as the MEP engineer-of-record, energy consultant and provided system commissioning.
The site was using (2) 25,000 CFM hot water / chilled water air handling units to condition their gymnasium. The existing unit was unable to properly maintain conditions for several reasons, primarily driven by poor performance of a water-to-water heat geothermal heat pump and malfunctioning heat recovery wheels.
The school wanted to modify the unit to increase the total capacity of the system to match the needs of the space and improve the indoor environment by providing better control of temperature, relative humidity and overall indoor air quality.
HRG was the engineer of record and partnered with the ESCO to provide energy consulting and design services as part of a Guaranteed Energy Savings Project. HRG’s design responsibilities included Mechanical, Electrical, Plumbing, Fire Alarm and Fire Protection engineering (“MEPS”).
The Air Handling Units were equipped with (2) sets of hydronic coils. The first set of coils was a hot water coil fed from the existing hot water plant onsite. The second coil was a dual-temperature coil that received both hot and chilled water (provided from a W2W geothermal heat pump) based on the demands of the space. The unit was modified to remove the dual temperature coil and replace it with a new, multi-section VRF heating coil. The VRF coils were sized to provide 100% of the heating and cooling load. The units were also modified to include GPS Ionization Filters that were used to remove contaminants from the air (pre-Covid19) to allow for further reduction of outside air.
HRG’s Design Responsibilities Included:
HRG’s Construction/Engineering Oversight Responsibilities Included:
This project was successfully completed and put into operation in 2021.