Concentration heat collection scattering heat storage solar water heating system inversion-preventing heating device and method

Abstract

The invention relates to a solar water heating system inversion-preventing heating device which is composed of a public heating medium system and a user heating medium system. The public heating medium system is in circulation communication with the user heating medium system. The heating device is characterized in that a first temperature sensor is arranged on a solar heat exchange water tank, a fourth temperature sensor and a second solenoid valve are arranged at the tail end, connected with the user heating medium circulation pipeline, of the public heating medium circulation pipeline, a third temperature sensor is arranged on a user heat exchange water tank, and a second temperature sensor and a first solenoid valve are arranged at the tail end, connected with the public heating medium circulation pipeline, of the user heating medium circulation pipeline. The invention further discloses the inversion-preventing heating device and an inversion-preventing heating method. The device and method realize dry pipe circulation of the public heating medium circulation pipeline, and the inside of the public heating medium circulation pipeline is maintained at high temperature, so that the retention volume of cold water in the public heating medium circulation pipeline is reduced, and heat exchange efficiency is greatly improved. Meanwhile, the occurrence of inversion heating conditions is effectively avoided, and engineering designs are optimized.

Description

technical field [0001] The invention belongs to the technical field of solar energy utilization in engineering buildings, and in particular relates to an anti-reverse heating device and method for a concentrated heat collection and dispersed heat storage solar water heating system. Background technique [0002] Centralized heat collection-household heat storage solar hot water system, is to place the heat collectors on the roof of the building, and each household is equipped with a set of relatively independent hot water storage tanks. The hot water storage tanks have built-in heat exchange devices and electric auxiliary heating devices. , and the public equipment is centrally placed in the equipment room or on the roof. The heat energy collected by the solar heat collector is sent to the heat exchange device in the indoor hot water storage tank through the circulation pipeline for heat exchange to heat the water in the hot water storage tank. When the sunlight is insuffici...

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Problems solved by technology

However, the following situations are likely to occur in engineering applications: that is, when the occupancy rate is low, the heat medium circulation is not smooth, and there is a lot of cold water retention in the public heat medium pipe network. The heat in the original water tank is used indoors, which not only affects the heat exchange speed and efficiency, but also causes the indoor electric auxiliary heating device to reversely heat the heat medium in the public pipe network, which greatly increases the electricity bill burden of the early occupants

However, it is often difficult to find the cause of this invisible energy consumption. Therefore, solving the problems of large stagnation and reverse heating in the public pipe network of the solar water heating system is a subject that needs to be studied for engineering design optimization.

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