Deep interference-free geothermal heat storage and supply system

Abstract

The utility model discloses a deep interference-free geothermal heat storage and supply system, which takes a fire pool as a heat storage pool, and comprises a geothermal double-pipe heat exchanger, a first heat pump unit, a fire pool, a second heat pump unit and a heat exchange terminal, the heat supply end of the geothermal double-pipe heat exchanger is connected with the heat using end of the first heat pump unit and the heat using end of the fire pool through heat exchange pipelines. The heat supply end of the first heat pump unit is connected with the heat using end of the fire pool and the heat exchange terminal through heat exchange pipelines. The heat supply end of the fire pool is connected with the heat utilization end of the second heat pump unit through a heat exchange pipeline; the heat supply end of the second heat pump unit is connected with the heat exchange terminal through a heat exchange pipeline; and valves are arranged on the heat exchange pipelines. According to the utility model, heat energy waste is effectively reduced, heat supply stability is improved, operation cost is reduced, optimal allocation of resources is realized, heat consumption quality of users is obviously improved, and green energy development is promoted.

Description

Technical Field

[0001] This utility model belongs to the field of geothermal heating technology and relates to a deep, non-intrusive geothermal heat storage and heating system. Background Technology

[0002] Medium-deep, non-intrusive geothermal heating technology involves drilling holes into medium- and high-temperature rock formations at depths of 2,000-3,000 meters using a drilling rig. Sealed metal heat exchangers are installed within the holes, and the heat is transferred from the deep underground to surface buildings via a specialized equipment system. This technology does not extract hot groundwater or use groundwater, hence it is also known as "dry hot rock heating."

[0003] In commercial heating projects, daytime heat consumption is typically greater than nighttime heat consumption; moreover, daytime heat consumption varies with outdoor temperature. When daytime outdoor temperatures are high, heat consumption is low, leaving the heat energy generated by geothermal wells idle at night, resulting in resource waste; conversely, when outdoor temperatures are low, heat consumption surges, leading to insufficient heat supply from geothermal wells and affecting heating efficiency. Summary of the Invention

[0004] The technical problem solved by this utility model is to provide a deep, non-intrusive geothermal heat storage and heating system that can effectively regulate and store thermal energy to achieve optimized utilization of geothermal resources.

[0005] This utility model is achieved through the following technical solution:

[0006] A deep, non-intrusive geothermal heat storage and heating system, using a fire water tank as the heat storage tank, includes a geothermal jacket heat exchanger, a first heat pump unit, a fire water tank, a second heat pump unit, and a heat exchange terminal.

[0007] The heating end of the geothermal jacket heat exchanger is connected to the heating end of the first heat pump unit and the heating end of the fire water tank via heat exchange pipes; the heating end of the first heat pump unit is connected to the heating end of the fire water tank and the heat exchange terminal via heat exchange pipes; the heating end of the fire water tank is connected to the heating end of the second heat pump unit via heat exchange pipes; the heating end of the second heat pump unit is connected to the heat exchange terminal via heat exchange pipes; valves are installed on all heat exchange pipes.

[0008] When the outdoor temperature is high, the thermal storage heating system is in low heating mode:

[0009] At night, the heating end of the geothermal jacket heat exchanger is connected to the heating end of the fire water tank to maintain the water temperature in the fire water tank; the heating end of the fire water tank is connected to the heating end of the second heat pump unit through heat exchange pipes, and the heating end of the second heat pump unit is connected to the heat exchange terminal through heat exchange pipes.

[0010] During the day, the heating end of the geothermal shell heat exchanger is connected to the heat-using end of the fire water tank via the heat exchange pipe of the first heat pump unit to maintain the water temperature in the fire water tank; the heating end of the fire water tank is connected to the heat-using end of the second heat pump unit via the heat exchange pipe, and the heating end of the second heat pump unit is connected to the heat exchange terminal via the heat exchange pipe.

[0011] When the outdoor temperature is low, the thermal storage heating system is in high heating mode:

[0012] At night, the heating end of the geothermal jacket heat exchanger is connected to the heating end of the first heat pump unit, and the heating end of the first heat pump unit is connected to the heating end of the fire water tank to maintain the water temperature in the fire water tank; the heating end of the fire water tank is connected to the heating end of the second heat pump unit through heat exchange pipes, and the heating end of the second heat pump unit is connected to the heat exchange terminal through heat exchange pipes.

[0013] During the day, the heating end of the geothermal shell heat exchanger is connected to the heat-using end of the first heat pump unit, and the heating end of the first heat pump unit is connected to the heat exchange terminal through heat exchange pipes; the heating end of the fire water tank is connected to the heat-using end of the second heat pump unit through heat exchange pipes, and the second heat pump unit provides auxiliary heating, with its heating end connected to the heat exchange terminal through heat exchange pipes.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] The deep, non-intrusive geothermal heat storage and heating system provided by this utility model achieves efficient storage and regulation of thermal energy by storing fire water in an idle fire water tank. This not only solves the problem of idle geothermal well thermal energy, but also ensures a continuous and stable output of geothermal energy to meet heating needs under different temperature conditions.

[0016] The deep, non-intrusive geothermal heat storage and heating system provided by this utility model uses two sets of heat pump systems to release and store heat energy during the day and night, respectively, based on outdoor temperature and heating demand. This improves the efficiency of geothermal energy utilization, reduces other energy consumption, lowers operating costs, achieves green and environmentally friendly heating, and enhances the heating quality of commercial projects.

[0017] The deep, non-intrusive geothermal storage heating system provided by this utility model effectively reduces heat energy waste, improves heating stability, lowers operating costs, optimizes resource allocation, significantly improves the quality of heating for users, and promotes the development of green energy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the nighttime heating supply of a thermal storage heating system under low heating mode.

[0019] Figure 2 This is a schematic diagram of a daytime heating system using a thermal storage heating system under low heating mode.

[0020] Figure 3 This is a schematic diagram of the nighttime heating supply of the thermal storage heating system under high heating mode;

[0021] Figure 4 This is a schematic diagram of a daytime heating system using a thermal storage heating system under high heating mode. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These descriptions are intended to explain the present invention and not to limit it.

[0023] A deep, non-intrusive geothermal heat storage and heating system, using a fire water tank as the heat storage tank, includes a geothermal jacket heat exchanger, a first heat pump unit, a fire water tank, a second heat pump unit, and a heat exchange terminal.

[0024] The heating end of the geothermal jacket heat exchanger is connected to the heating end of the first heat pump unit and the heating end of the fire water tank via heat exchange pipes; the heating end of the first heat pump unit is connected to the heating end of the fire water tank and the heat exchange terminal via heat exchange pipes; the heating end of the fire water tank is connected to the heating end of the second heat pump unit via heat exchange pipes; the heating end of the second heat pump unit is connected to the heat exchange terminal via heat exchange pipes; valves are installed on all heat exchange pipes.

[0025] Specifically, the heat pump units all adopt existing implementation methods, including heating components such as condensers, evaporators, expansion valves, and compressors.

[0026] When the outdoor temperature is high, the thermal storage heating system is in low heating mode:

[0027] At night, the heating end of the geothermal jacket heat exchanger is connected to the heating end of the fire water tank to maintain the water temperature in the fire water tank; the heating end of the fire water tank is connected to the heating end of the second heat pump unit through heat exchange pipes, and the heating end of the second heat pump unit is connected to the heat exchange terminal through heat exchange pipes.

[0028] During the day, the heating end of the geothermal shell heat exchanger is connected to the heat-using end of the fire water tank via the heat exchange pipe of the first heat pump unit to maintain the water temperature in the fire water tank; the heating end of the fire water tank is connected to the heat-using end of the second heat pump unit via the heat exchange pipe, and the heating end of the second heat pump unit is connected to the heat exchange terminal via the heat exchange pipe.

[0029] For example, when the outdoor temperature is high, at night, geothermal energy is directly stored in the indoor fire water tank, maintaining the water temperature in the fire water tank at 30°C. The second heat pump unit extracts a small amount of heat energy from the fire water tank for nighttime heating for users. During the day, the first heat pump unit is not turned on, but exchanges heat with geothermal energy through its heat exchange pipes and then acts on the fire water tank, maintaining the water temperature in the fire water tank at 30°C. The second heat pump unit continuously extracts heat energy from the water tank to supply heat to users.

[0030] When the outdoor temperature is low, the thermal storage heating system is in high heating mode:

[0031] At night, the heating end of the geothermal jacket heat exchanger is connected to the heating end of the first heat pump unit, and the heating end of the first heat pump unit is connected to the heating end of the fire water tank to maintain the water temperature in the fire water tank; the heating end of the fire water tank is connected to the heating end of the second heat pump unit through heat exchange pipes, and the heating end of the second heat pump unit is connected to the heat exchange terminal through heat exchange pipes.

[0032] During the day, the heating end of the geothermal shell heat exchanger is connected to the heat-using end of the first heat pump unit, and the heating end of the first heat pump unit is connected to the heat exchange terminal through heat exchange pipes; the heating end of the fire water tank is connected to the heat-using end of the second heat pump unit through heat exchange pipes, and the second heat pump unit provides auxiliary heating, with its heating end connected to the heat exchange terminal through heat exchange pipes.

[0033] For example, when the outdoor temperature is high, at night, geothermal energy is supplied to the fire water tank through heat exchange by the first heat pump unit. The heat energy is stored in the fire water tank to maintain the water temperature in the fire water tank at 50°C. The second heat pump unit extracts a small amount of heat energy from the water tank to maintain the temperature of the user's pipeline. During the day, geothermal energy is directly extracted to supply heat to users through heat exchange by the first heat pump unit. The second heat pump unit provides auxiliary heating by extracting heat energy from the fire water tank to supplement the heating supply, ensuring stable heating quality for users.

[0034] Specific implementation examples are given below.

[0035] See Figure 1 When the outdoor temperature is high, at night, the geothermal energy directly exchanges heat with the indoor fire water tank, keeping the water in the tank at 30°C. The second heat pump unit extracts a small amount of heat energy from the fire water tank to provide heating for users at night.

[0036] See Figure 2 When the outdoor temperature is high, the first heat pump unit is not turned on during the day. The heat is directly exchanged with the geothermal energy to maintain the water temperature in the fire water tank at 30°C. The second heat pump unit continuously extracts heat energy from the water tank to supply heat to users.

[0037] See Figure 3 When the outdoor temperature is low, at night, the geothermal energy is exchanged through the first heat pump unit and then applied to the fire water tank. The heat energy is stored in the fire water tank to maintain the water temperature in the fire water tank at 50°C. The second heat pump unit extracts a small amount of heat energy from the fire water tank to provide heating for users at night.

[0038] See Figure 4 When the outdoor temperature is low, during the day, geothermal energy is directly extracted by the first heat pump unit to supply heat to users, and the second heat pump unit extracts heat from the fire water tank to supplement the heating.

[0039] The embodiments given above are preferred examples of implementing this utility model, and this utility model is not limited to the above embodiments. Any non-essential additions or substitutions made by those skilled in the art based on the technical features of the technical solution of this utility model shall fall within the protection scope of this utility model.

Claims

1. A deep, non-intrusive geothermal heat storage and heating system, characterized in that, Using a fire water tank as a heat storage tank, the heat storage and heating system includes a geothermal shell heat exchanger, a first heat pump unit, a fire water tank, a second heat pump unit, and heat exchange terminals. The heating end of the geothermal jacket heat exchanger is connected to the heating end of the first heat pump unit and the heating end of the fire water tank via heat exchange pipes; the heating end of the first heat pump unit is connected to the heating end of the fire water tank and the heat exchange terminal via heat exchange pipes; the heating end of the fire water tank is connected to the heating end of the second heat pump unit via heat exchange pipes; the heating end of the second heat pump unit is connected to the heat exchange terminal via heat exchange pipes; valves are installed on all heat exchange pipes.

2. The deep, non-intrusive geothermal thermal storage and heating system as described in claim 1, characterized in that, When the outdoor temperature is high, the thermal storage heating system is in low heating mode: At night, the heating end of the geothermal jacket heat exchanger is connected to the heating end of the fire water tank to maintain the water temperature in the fire water tank; the heating end of the fire water tank is connected to the heating end of the second heat pump unit through heat exchange pipes, and the heating end of the second heat pump unit is connected to the heat exchange terminal through heat exchange pipes. During the day, the heating end of the geothermal shell heat exchanger is connected to the heat-using end of the fire water tank via the heat exchange pipe of the first heat pump unit to maintain the water temperature in the fire water tank; the heating end of the fire water tank is connected to the heat-using end of the second heat pump unit via the heat exchange pipe, and the heating end of the second heat pump unit is connected to the heat exchange terminal via the heat exchange pipe.

3. The deep, non-intrusive geothermal heat storage and heating system as described in claim 1, characterized in that, When the outdoor temperature is low, the thermal storage heating system is in high heating mode: At night, the heating end of the geothermal jacket heat exchanger is connected to the heating end of the first heat pump unit, and the heating end of the first heat pump unit is connected to the heating end of the fire water tank to maintain the water temperature in the fire water tank; the heating end of the fire water tank is connected to the heating end of the second heat pump unit through heat exchange pipes, and the heating end of the second heat pump unit is connected to the heat exchange terminal through heat exchange pipes. During the day, the heating end of the geothermal shell heat exchanger is connected to the heat-using end of the first heat pump unit, and the heating end of the first heat pump unit is connected to the heat exchange terminal through heat exchange pipes; the heating end of the fire water tank is connected to the heat-using end of the second heat pump unit through heat exchange pipes, and the second heat pump unit provides auxiliary heating, with its heating end connected to the heat exchange terminal through heat exchange pipes.

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