Central heating system with co-operation of carbon dioxide heat pump and solar energy

Abstract

The invention discloses a central heating system with co-operation of a carbon dioxide heat pump and solar energy. The system is composed of a solar hot water sub-system, a carbon dioxide heat pump sub-system, a thermal storage device, a heating and water return sub-system and a control system. One carbon dioxide heat pump or a plurality of carbon dioxide heat pump is operated in parallel. A group of solar thermal or a plurality of groups of solar thermal collectors are operated in parallel. One or the plurality of carbon dioxide heat pump and a high temperature zone and a middle temperature zone in the thermal storage device form a circulation system. A cold water tank supplies the carbon dioxide heat pump with water. The group of solar thermal or the plurality of groups of solar thermal collectors and the middle temperature zone in the thermal storage device form a circulation system. A mixing water controlling valve is use for controlling the water supplying temperature. The water return is controlled through time or temperature. The water returns back to an expansion zone in the middle temperature zone. The central heating system with co-operation of the carbon dioxide heat pump and the solar energy improves the utilization rate of solar energy, maximize the using efficiency through the reasonable operation of the carbon dioxide heat pump, and reduce energy usage amount, thereby improving system efficiency and energy efficiency.

Description

technical field [0001] The invention belongs to the technical field of building central heating application and relates to CO 2 Combined operation of heat pumps and solar energy for efficient and energy-saving central heating systems, specifically a CO 2 Heat pumps complement solar energy to run the district heating system. Background technique [0002] At present, domestic high-rise buildings adopt two ways of heating: household type and centralized type. The household type hot water supply is mainly based on gas and electric water heaters, and the centralized type is mainly based on gas boilers, oil-fired boilers, electric boilers and solar energy. [0003] (1) Household hot water supply using gas water heaters and electric water heaters has the advantages of simple control and convenient use. The disadvantages are large investment, high energy consumption and safety issues. [0004] (2) Gas-fired boilers and oil-fired boilers provide centralized heating, which has the ...

AI Technical Summary

Problems solved by technology

The disadvantage is that due to the restriction of the roof area, the amount of hot water is limited, and affected by the weather, hot water supply cannot be guaranteed around the clock

[0007] (5) The combined heating of solar energy, fuel oil, gas, and electric heating can make up for the shortcomings of the single solar heating method, but it still cannot solve the problems of energy consumption, environmental protection, and safety.

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