Project Overview：
The Anhui Normal University Huajin Campus project received the prestigious “Best Application Award for Multi-Energy Complementary Heat Pump” at the 2023 “Energy Saving Cup” Eighth Heat Pump System Application Design Competition. This innovative project utilizes 23 Hien KFXRS-40II-C2 air source heat pumps to meet the hot water needs of over 13,000 students on campus.
Design Highlights
This project utilizes both air-source and water-source heat pump water heaters for thermal energy provision. It comprises a total of 11 energy stations. The system operates by circulating water from the waste heat pool through a 1:1 water-source heat pump, which preheats the tap water through waste heat cascade utilization. Any deficit in heating is compensated by the air-source heat pump system, with the heated water stored in a newly constructed constant-temperature hot water tank. Subsequently, a variable frequency water supply pump delivers water to the bathrooms, maintaining a constant temperature and pressure. A variable frequency water supply pump then delivers water to the bathrooms, maintaining a consistent temperature and pressure. This integrated approach establishes a sustainable cycle, ensuring a continuous and reliable supply of hot water.
Performance and Impact
1，Energy Efficiency
The advanced heat pump waste heat cascade technology significantly enhances energy efficiency by maximizing waste heat recovery. Wastewater is discharged at a low temperature of 3°C, and the system utilizes only 14% of electricity to drive the process, achieving 86% waste heat recycling. This setup has resulted in a savings of 3.422 million kWh of electricity compared to traditional electric boilers.
2，Environmental Benefits
By utilizing waste hot water to produce new hot water, the project effectively replaces fossil energy consumption in university bathrooms. The system has produced a total of 120,000 tons of hot water, with an energy cost of just 2.9 yuan per ton. This approach has saved 3.422 million kWh of electricity and reduced carbon dioxide emissions by 3,058 tons, contributing significantly to environmental protection and emission reduction efforts.
3，User Satisfaction
Prior to the renovation, students faced unstable water temperatures, distant bathroom locations, and long queues for bathing. The upgraded system has greatly improved the bathing environment, providing stable hot water temperatures and reducing wait times. The enhanced convenience and reliability have been highly appreciated by the students.
Post time: Jun-18-2024