CHP VR Tour: Roof top

Liquid Desiccant Dehumidifier, RTU, and Goettl Chillers It shows one of the existing 90-ton electric RTU in the center. The piping going to and coming from the RTU is for the condensed refrigerant coming from the refrigerant condensers of the Goettl chillers and for the refrigerant returning to the compressor of the Goettl chillers.
On the far left is the Kathabar liquid desiccant dehumidifier. The aluminum color piping on the floor (in the fore ground) is for the hot water coming from the heat recovery units, that recover heat from exhaust gases of the natural gas-driven engines in the Goettl chillers, and for returning the water back to the heat recovery units. Energy in the hot from is used for regenerating the liquid desiccant dehumidifier. The dehumidifier removes moisture from the fresh air intake and delivers dehumidified air, via the ductwork at the top, to the cooling coil in the RTU.

A click on "Inspection" will allow a view of the new cooling coil installed inside of the existing RTU.

Going 180 degrees from the opening view (RTU), shows the duct bringing hot flue gases from the absorption chiller located on the ground floor. These gases go the solid desiccant dehumidifier (not shown in this tour).