It is a groundwater heat utilization system that drains groundwater pumped up from a pumping well to the outside through a drainage channel after heat exchange.
In the drainage channel, by using the groundwater after the exchange as a supplemental heat source in the waste water reuse preheater , to increase the efficiency of the heat pump machine , the roof top of the building and the water sprinkling section to sprinkle on the surface , it become available configuration.
- A heat exchanger for preheating is installed in the heat pump circuit of the heat pump and heat is extracted in two stages to increase the heat exchange rate and reduce the amount of groundwater used.
- The water after the heat extraction is used for sprinkling the roof and it contributes in reduction of coolers load in summer and in melting snow of roof in winter.
Otaka’s Research , Development and It’s Result
Project: Multistage Underground Water Heat Utilization System
Customer: Otaka Construction Co.,Ltd( Research and Development)
Contractor: Otaka Construction Co.,Ltd( Research and Development)
Period: September,2014 to July 2015
Place: Kurobe City Unazuki Onsen