Pit type and buried pipe combined cross-seasonal heat storage system

Abstract

The utility model provides a pit type and buried pipe combined cross-seasonal heat storage system which comprises a heat storage water pit, a vertical buried pipe, a horizontal buried pipe, a heat source, a heat pump unit, a heat consumer, a first valve, a second valve, a third valve, a fourth valve set, a fifth valve and a sixth valve. Heat sources such as solar energy, industrial waste heat and power plant waste heat in summer can be fully utilized and used for heating in winter in a cross-season mode, the heat source utilization efficiency is improved, and energy waste is reduced. According to the utility model, the pit-type heat storage and insulation cost can be reduced, the heat loss of pit-type heat storage is reduced, and the pit-type heat storage efficiency is improved; according to the utility model, the application scene of buried pipe heat storage can be expanded, and the heat density and heat storage efficiency of the rock-soil body are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of inter-seasonal heat storage systems, and in particular to an inter-seasonal heat storage system combined with a pit type and an underground pipe. Background Art

[0002] At present, there is nowhere to store the heat from many heat sources in the summer, resulting in a lot of waste, such as solar energy, industrial waste heat, and power plant waste heat. How to use the waste heat in the summer for heating in the winter is an urgent problem that needs to be solved. Pit heat storage is to heat the water in the water storage pit and store energy, and buried pipe heat storage is to heat the underground rock and soil around the buried pipe and store energy. The advantages of pit heat storage are large heat storage capacity and high thermal density, and the disadvantages are high insulation cost, large heat loss, and low heat storage efficiency. The advantages of buried pipe heat storage are low cost, convenient construction, and the ability to recover low-quality thermal energy in the rock and soil. The disadvantages are low thermal density and the need to work with a heat pump unit. Utility Model Content

[0003] The purpose of the utility model is to address the problems existing in the prior art and to provide a pit-type and underground pipe combined cross-seasonal heat storage system, so as to store the waste heat of the summer heat source in the hot water storage pit and the rock and soil around it, and in the winter heating stage, directly supply the heat in the high-quality hot water storage pit to the heat users, and supply the heat in the low-quality rock and soil to the heat users through the heat pump unit, thereby reducing heat loss and improving heat storage efficiency.

[0004] To achieve the above-mentioned purpose, the utility model provides a pit-type and underground pipe combined cross-seasonal heat storage system, including a hot water storage pit, a vertical underground pipe, a horizontal underground pipe, a heat source, a heat pump unit, a heat user, a first valve, a second valve, a third valve, a fourth valve group, a fifth valve and a sixth valve, wherein:

[0005] The hot water storage pit is located below the ground, the vertical buried pipes are located around the hot water storage pit, the horizontal buried pipes are located at the bottom of the hot water storage pit, the heat source is connected to the hot water storage pit and the vertical buried pipes, a first valve and a second valve are respectively provided between the heat source and the vertical buried pipes and the hot water storage pit on one side, a third valve is provided between the vertical buried pipe on the other side and the hot water storage pit, and the vertical buried pipes around the hot water storage pit are interconnected through the horizontal buried pipes;

[0006] One side of the heat user is connected to the hot water storage pit through the fourth valve group, and the other side is connected to the heat pump unit. A fifth valve and a sixth valve are respectively provided between the heat pump unit and the vertical buried pipe;

[0007] Under the heat storage condition during the non-heating period, open the first valve, the second valve, and the third valve, and close the fourth valve group, the fifth valve, and the sixth valve to store the heat of the heat source in the hot water storage pit and store the heat in the surrounding rock and soil through the vertical buried pipe and the horizontal buried pipe;

[0008] Under heating conditions during the heating period, close the first valve, the second valve, and the third valve, and open the fourth valve group, the fifth valve, and the sixth valve, so that the heat in the hot water pit is directly supplied to the heat users, and the heat in the rock and soil is supplied to the heat users through the heat pump unit.

[0009] Positive effects of this utility model:

[0010] (1) The utility model can make full use of heat sources such as summer solar energy, industrial waste heat, and power plant waste heat, and use them across seasons for winter heating, thereby improving the efficiency of heat source utilization and reducing energy waste.

[0011] (2) The utility model can reduce the insulation cost of pit-type heat storage, reduce the heat loss of pit-type heat storage, and improve the efficiency of pit-type heat storage.

[0012] (3) The utility model can expand the application scenarios of buried pipe heat storage and improve the thermal density and heat storage efficiency of rock and soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0014] Figure 1 This is the heat storage working condition of the utility model during the non-heating period;

[0015] Figure 2 This is the heating working condition of the utility model during the heating period.

[0016] Explanation of the markings in the figure: 1—heat storage pit; 2—vertical buried pipe; 3—horizontal buried pipe; 4—heat source; 5—heat pump unit; 6—heat user; 7—first valve; 8—second valve; 9—third valve; 10—fourth valve group; 11—fifth valve; 12—sixth valve. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0018] like Figure 1 and Figure 2As shown in the embodiment of the utility model, a pit-type and buried pipe combined cross-seasonal heat storage system is provided, including: a hot water storage pit 1, a vertical buried pipe 2, a horizontal buried pipe 3, a heat source 4, a heat pump unit 5, a heat user 6, a first valve 7, a second valve 8, a third valve 9, a fourth valve group 10, a fifth valve 11, and a sixth valve 12.

[0019] The hot water storage pit 1 is located below the ground, the vertical buried pipes 2 are located around the hot water storage pit 1 , and the horizontal buried pipes 3 are located at the bottom of the hot water storage pit 1 .

[0020] The heat source 4 is connected to the hot water storage pit 1, the vertical buried pipe 2, the horizontal buried pipe 3, the first valve 7, the second valve 8, and the third valve 9 and is not limited to a series connection. Specifically, the heat source 4 is connected to the hot water storage pit 1 and the vertical buried pipe 2. A first valve 7 and a second valve 8 are respectively provided between the heat source 4 and the vertical buried pipe 2 and the hot water storage pit 1 on one side, and a third valve 9 is provided between the vertical buried pipe 2 and the hot water storage pit 1 on the other side. The vertical buried pipes 2 around the hot water storage pit 1 are interconnected through the horizontal buried pipe 3.

[0021] The heat user 6 is connected to the hot water storage pit 1 and the fourth valve group 10, that is, the heat in the high-quality hot water storage pit 1 is directly supplied to the heat user 6; the heat user 6 is connected to the heat pump unit 5, the vertical buried pipe 2, the horizontal buried pipe 3, the fifth valve 11, and the sixth valve 12 and is not limited to a series connection. Specifically, one side of the heat user 6 is connected to the hot water storage pit 1 through the fourth valve group 10, and the other side is connected to the heat pump unit 5. The fifth valve 11 and the sixth valve 12 are respectively provided between the heat pump unit 5 and the vertical buried pipe 2, and the vertical buried pipes 2 around the hot water storage pit 1 are interconnected through the horizontal buried pipe 3.

[0022] Under the heat storage condition during the non-heating period, open the first valve 7, the second valve 8, the third valve 9, and close the fourth valve group 10, the fifth valve 11, and the sixth valve 12 to store the heat of the heat source 4 in the hot water storage pit 1 and the surrounding rock and soil.

[0023] Under the heating condition during the heating period, close the first valve 7, the second valve 8, the third valve 9, and open the fourth valve group 10, the fifth valve 11, and the sixth valve 12, that is, the heat in the high-quality hot water storage pit 1 is directly supplied to the heat user 6, and the heat in the low-quality rock and soil is supplied to the heat user 6 through the heat pump unit 5.

[0024] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pit-type and underground pipe combined inter-seasonal heat storage system, comprising a hot water storage pit, a vertical underground pipe, a horizontal underground pipe, a heat source, a heat pump unit, a heat user, a first valve, a second valve, a third valve, a fourth valve group, a fifth valve and a sixth valve, wherein: The hot water storage pit is located below the ground, the vertical buried pipes are located around the hot water storage pit, the horizontal buried pipes are located at the bottom of the hot water storage pit, the heat source is connected to the hot water storage pit and the vertical buried pipes, a first valve and a second valve are respectively provided between the heat source and the vertical buried pipes and the hot water storage pit on one side, a third valve is provided between the vertical buried pipes and the hot water storage pit on the other side, and the vertical buried pipes around the hot water storage pit are interconnected through the horizontal buried pipes; One side of the heat user is connected to the hot water storage pit through the fourth valve group, and the other side is connected to the heat pump unit. A fifth valve and a sixth valve are respectively provided between the heat pump unit and the vertical buried pipe; Under the heat storage condition during the non-heating period, open the first valve, the second valve, and the third valve, and close the fourth valve group, the fifth valve, and the sixth valve to store the heat of the heat source in the hot water storage pit and store the heat in the surrounding rock and soil through the vertical buried pipe and the horizontal buried pipe; Under heating conditions during the heating period, close the first valve, the second valve, and the third valve, and open the fourth valve group, the fifth valve, and the sixth valve, so that the heat in the hot water pit is directly supplied to the heat users, and the heat in the rock and soil is supplied to the heat users through the heat pump unit.

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