Solar heating heat-accumulating system

Abstract

The invention relates to a solar heating heat-accumulating system, comprising a solar thermal collector (1), a heat accumulator (2), a circulating pump (4), heating terminals (5), an expansion pot (6), a heat accumulator inlet valve (7) and a bypass valve (8). The system uses closed cycle; the outlet of the solar thermal collector (1) is connected with the heat accumulator (2) which is connected with the heating terminals (5) in series; the outlets of heating terminals (5) are provided with the circulating pump (4); a bypass is arranged between the solar thermal collector (1) and the heat accumulator (2) and is provided with the bypass valve (8) thereon; the expansion pot (6) is arranged on a pipeline; the structure of the heat accumulator (2) is in the mode of a heat exchanger, and hot water is not directly contacted with heat accumulating materials; the heat accumulator (2) is a square box or a cylindric pot, the box is filled with the heat accumulating materials (3), finned tubes (9) are arranged between the heat accumulating materials (3), and water can flow through the finned tubes (9) to exchange heat with the heat accumulating materials (3).

Description

technical field [0001] The invention relates to a solar heating heat storage system, which is suitable for solar heat utilization. Background technique [0002] At present, my country's energy shortage and serious environmental pollution, vigorously developing solar thermal utilization is an important way to alleviate energy shortage. Solar heating is an important branch of solar thermal utilization, but due to high cost and technology that needs to be improved, solar heating has not been developed. For large-scale applications, only a small number of demonstration projects have been built. [0003] A key technology in solar heating is heat storage. The energy flow density of solar radiation is low, and affected by cloudy days and nights, it cannot continuously heat the house. Therefore, a heat storage device is needed to store the solar energy obtained during the day. , for night or cloudy use. The completed demonstration projects generally use hot water tanks to store hea...

AI Technical Summary

Problems solved by technology

The completed demonstration projects generally use hot water tanks to store heat, which are bulky, and the water temperature fluctuates greatly. The solar radiation increases the water temperature, and the solar radiation decreases the water temperature, resulting in large indoor temperature fluctuations during the heating process.

[0004] Chinese patent CN2731356Y relates to a flat-plate solar phase change heat storage heating device, which uses phase change materials to store heat. The device integrates lighting, heat storage, heat exchange, and heat preservation. Secondary heat exchange is required in the process of heat storage and heating. , that is, the collector exchanges heat with the heat transfer medium during heat storage, the heat transfer medium exchanges heat with the rod-shaped black body heat storage element, the heat storage element exchanges heat with the heat transfer medium during heating, and the heat transfer medium exchanges heat with the water in the coil, resulting in the entire device Complex structure, low thermal efficiency

This mode of operation has the problems of complex system, large fluctuations in water temperature, large fluctuations in room temperature, complex control, and low reliability, and is not suitable for general household use.

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