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Multi-water tank heat storage device for combined heating of solar energy and heat pump
Solar heat pump stores heat storage in multiple tanks, efficiently provides heat, and utilizes low-level electricity and solar energy.
Type
Equipment
Tags
Energy
Water tank heat storage
Heat pump combined
Solar
Solution maturity
Early adoption / Process verification
Cooperation methods
Overall transfer
Technology licensing
Applicable industry
Scientific research and technology services
Applications
Architecture
Key innovations
The innovation of this product lies in: the unique multi-water tank parallel heat storage structure, combined with solenoid valves and temperature sensors, realizes intelligent hierarchical temperature management.
Potential economic benefits
Energy saving exceeds 60%, using low-level electricity to further reduce operating electricity bills by 10%-20%, significantly reducing long-term operating costs, and reducing peak load on the power grid.
Potential climate benefits
The system uses solar energy and high-efficiency heat pumps to replace traditional energy sources, significantly reducing power consumption by more than 60%. By optimizing power consumption periods and improving efficiency, the peak load of the power grid is reduced, carbon emissions from power production are effectively reduced, and comprehensive carbon reduction is achieved.
Solution supplier
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University of Shanghai for Science and Technology
University of Shanghai for Science and Technology
Shanghai is a key university that cultivates outstanding engineering and technical talents to serve national strategies and regional development.
Shanghai，China
Solution details

Introduction to the results:

The multi-tank heat storage device for combined heating by solar energy and heat pump is characterized in that 2 to 5 heat storage water tanks are connected in parallel in turn on the loop between the solar collector and the heat pump. The water supply or return main pipe of each heat storage water tank is provided with a solenoid valve, the water inlet or water outlet branch pipe is also provided with a solenoid valve, and the bottom of each heat storage water tank is provided with a temperature sensor; hot water connecting pipes enter from the bottom of the heat storage water tank and come out from the upper part, and connect each heat storage water tank in series; The water supply and return pipes of the solar heat collector are connected with the water supply and return pipes of the parallel heat storage tank at one end close to the cold water inlet, and the water supply and return pipes of the heat pump are connected with the water supply and return pipes of the parallel heat storage tank at the other end. The system has multiple operating modes such as heat pump charging, solar energy charging, and combined solar energy and heat pump charging.


Technical indicators:

1)Heat pump is used to assist heating, which saves more than 60% energy than electric auxiliary heating

2)Using low energy at night for heat storage can save 10% to 20% of the operating electricity bill compared with ordinary solar heat pump systems (calculated by halving the night electricity bill).  Advantages of this device:

1)It combines the advantages of solar energy and heat pump to maximize the use of solar energy and low-valley electricity under various weather conditions, saving electricity, reducing operating costs, and reducing the peak power load of the power grid.

2)The use of multiple water tanks in parallel for heat storage can disperse the concentrated load of the water tanks and the space occupied by them, allowing more choices and flexibility in the layout of the water tanks.

3)The temperature stratification between the water tanks is conducive to improving the operating efficiency of solar collectors and heat pumps.


Last updated
12:07:35, Nov 04, 2025
Information contributed by
Green Technology Bank

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