Heat supply system and method

Abstract

The invention relates to heat supply system and method. The system comprises an energy storage box and a main solar heat collector, an energy storage heat exchange coiler in the energy storage box and the main solar heat collector form a circulation loop through a pipeline, and refrigerant circulates in the loop. The system is characterized by further comprising a high pressure heat accumulator consisting of an auxiliary solar heat collector and an accumulator, and the auxiliary solar heat collector is connected with the main solar heat collector to form a communication structure; and the accumulator is used for accommodating refrigerant gas generated in the auxiliary solar heat collector and is connected with an inlet pipeline of the heat storage heat exchange coiler. The system further comprises a hot water tank and a compression type heat pump subsystem composed of a condenser, a compressor and a throttling valve which are arranged in the hot water tank as well as an evaporator arranged in the energy storage tank. By means of the high pressure heat accumulator, the heat supply system can convert solar heat into driving force for the circulation of the refrigerant and realizes forced refrigerant circulation without power consumption, thereby being more energy-saving and environmental-friendly.

Description

technical field [0001] The invention relates to a heating technology in the field of thermal engineering, in particular to a solar heating system and a heating method with a refrigerant-driven structure. Background technique [0002] The existing heating system mainly includes: fuel combustion heating system, electric heating heating system, air source heat pump system, solar energy heating system and ground source heat pump system. Among them, the primary energy efficiency of the fuel combustion heating system and the electric heating heating system is low, and it is difficult to meet the current social needs of energy conservation and emission reduction. [0003] see figure 1 Shown is an existing compressed air source heat pump heating system, which includes: a condenser 10, a compressor 11, an air source heat exchanger 12 and a throttle valve 13, and the above-mentioned components are connected by pipelines to form a closed cycle circuit, the refrigerant circulates in t...

AI Technical Summary

Problems solved by technology

The disadvantage of the existing solar heating system is that it depends too much on the weather. When the solar irradiance is low in rainy weather, the heat storage temperature of the hot water tank cannot reach the heating temperature required by the user, so it must be With auxiliary heating system

Usually, the auxiliary heating system adopts electric heating, and its highest energy efficiency ratio can only be close to 1. Even if there is still a certain solar irradiance on the solar collector plate during work, the solar heat cannot be effectively used for auxiliary heating, so Larger power consumption throughout the year and lower energy efficiency

In addition, since the temperature of the refrigerant must be higher than the heating temperature of the user, the working temperature of the solar collector is relatively high (usually above 42°C), so there is a large temperature difference with the environment, resulting in radiation, convection and Increased conduction heat loss reduces heat collection efficiency

At the same time, the solar heating system has a delivery pump. In order to maintain the circulation of the antifreeze, the delivery pump must consume a certain amount of electric energy

[0005] There is also a ground source heat pump circulation system that uses geothermal heat as a heat source. Since the ground source heat pump system needs to drill wells, the equipment investment is large, and the construction is complicated, and it is also easily restricted by geographical conditions.

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