Solar heating system and method with concentrated cross-seasonal and short-term distributed heat storage connected in series

Abstract

The invention discloses a concentrated cross-seasonal and short-term distributed heat storage series solar heating system and method. The system comprises a concentrated cross-seasonal heat storage solar heat source station and a short-term distributed heat storage distributed heat exchange station. The distributed heat exchange stations are connected in parallel; the solar heat source station is connected with each distributed heat exchange station through a long-distance transmission and distribution pipeline; the distributed heat exchange station is connected with a user heating system; heat collected by a solar heat collection field is stored in a concentrated cross-seasonal heat storage water tank, the heat is conveyed to a short-term distributed heat storage distributed heat exchange station at low temperature through a long-distance conveying and distribution pipeline, the heat is subjected to heat exchange and quality improvement through a water-water heat exchange heat pump in the heat exchange station, and then hot water with the temperature increased is stored in a short-term heat storage water tank; and finally, the circulating booster pump and the water segregator are used for supplying heat to each heat user. The energy utilization rate of the solar heating system can be effectively improved, and the stability of the system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of solar heating, in particular to a solar heating system and method in which centralized cross-season and short-term distributed thermal storage are connected in series. Background technique [0002] Solar heating is an important technical branch of solar thermal utilization technology at this stage. Although the total amount of solar energy resources is huge, due to the characteristics of daily fluctuations and seasonal fluctuations in solar radiation, the intermittent heating of solar heating systems is unstable. At this stage, low-cost hot water heat storage is the most effective way to alleviate the instability of solar heating. [0003] According to the size of the solar heating water storage body, it can generally be divided into two ways: long-term and short-term heat storage across seasons. The short-term heat storage system has the characteristics of low cost, small heat loss, but limited heat st...

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Problems solved by technology

For large-scale regional solar heating systems, in order to use the solar heat collected outside the heating season to improve the solar energy guarantee rate, a large-scale cross-seasonal hot water storage body is usually used. Due to the long duration of heat storage and the large heat dissipation area , leading to a large proportion of heat loss in cross-seasonal heat storage tanks, especially when the design heat storage temperature of the heat storage pool is high, the heat storage loss is more significant

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