Dalian Hoko, an independent research and development company, has successfully implemented a sewage-source heat pump system at the Friendship Shopping Center in the city's industrial zone. The system has been operating smoothly for nearly five months, providing heating in winter, cooling in summer, and hot water supply. Recently, the Municipal Economic Commission officially recognized and promoted this primary sewage-source heat pump technology. The Liaoning Provincial Department of Construction highlighted that this project is the first of its kind in both the province and the country.
According to reports, the system offers a savings rate of over 20% in initial investment and operational costs. Unlike traditional central air conditioning systems, it eliminates the need for cooling towers, boiler rooms, or heat exchanger rooms, reducing capital expenditures. Compared to water-source heat pumps, it avoids drilling costs, and compared to ground-source heat pumps, it saves land and investment expenses.
This innovative technology not only conserves energy but also protects the environment. It achieves an efficiency of over 80% in primary energy use, consuming 10% to 50% less power than ground-source heat pumps and saving 30% to 60% in operating costs compared to conventional central air conditioning. Since no cooling tower is required, there’s no risk of water evaporation or flooding during summer operations. For every 10,000 square meters, more than 4,000 tons of water can be saved annually. Additionally, each ton of wastewater processed reduces carbon dioxide emissions by 4.8 kg, significantly lowering sulfur and nitrogen oxide emissions. It also completely eliminates the noise typically caused by cooling towers or air-cooled units, making it a quieter and more sustainable solution.
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