Waste cold or waste heat recovery system for solving pipe gallery condensation

Abstract

The utility model relates to a waste cold or waste heat recovery system for solving pipe gallery condensation, the system comprises a radiator and a water cooling VWV unit, the radiator is installed in a pipe gallery and is used for recovering waste cold or waste heat in the pipe gallery; a water supply inlet of the radiator is communicated with one end of a water supply pipe; the other end of the water supply pipe is communicated with a water outlet of the water-cooling VWV unit; a water return outlet of the radiator is communicated with one end of a water return pipe; and the other end of the water return pipe is communicated with a water return port of the water-cooling VWV unit. According to the device, the problem of condensation of the pipe gallery is solved while waste cold in the pipe gallery is recycled, the important protection effect on safe operation of the pipe gallery is achieved, and meanwhile good energy-saving benefits are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste cooling or waste heat recovery, and in particular to a waste cooling or waste heat recovery system for solving condensation in a pipe gallery. Background Art

[0002] The underground integrated pipeline corridor system not only solves urban traffic congestion but also greatly facilitates the maintenance and overhaul of municipal facilities such as electricity, communications, gas, and water supply and drainage. Furthermore, the system also has a certain role in earthquake prevention and disaster reduction. Underground integrated pipeline corridors play a vital role in meeting basic public needs and improving the city's comprehensive carrying capacity. However, severe condensation inside the corridors causes corrosion of pipe racks, pipelines, and concrete walls. Corrosion and leakage of thermal pressure pipes can cause burns and widespread heating outages in winter. Natural gas is flammable and explosive, and corrosion and leakage of pipelines are likely to cause fires and explosions. Corrosion and leakage of water supply pipelines can seriously affect the city's water security and seriously affect the city's operational safety. Summary of the Invention

[0003] The utility model aims to provide a waste cooling or waste heat recovery system for solving the problem of condensation in a pipe gallery. The technical problem to be solved at least includes how to eliminate condensation in the pipe gallery and recover the waste cooling in the pipe gallery at the same time.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a waste cooling or waste heat recovery system for solving condensation in a pipe corridor, comprising a radiator and a water-cooled VWV unit, wherein the radiator is installed in the pipe corridor for recovering waste cooling or waste heat in the pipe corridor; the water supply inlet of the radiator is connected to one end of a water supply pipe; the other end of the water supply pipe is connected to a water outlet of the water-cooled VWV unit; the return water outlet of the radiator is connected to one end of a return water pipe; the other end of the return water pipe is connected to the return water outlet of the water-cooled VWV unit; the water supply outlet of the water-cooled VWV unit is connected to one end of a user-end water supply pipe; the other end of the user-end water supply pipe is connected to the water inlet of the user-end; the return water inlet of the water-cooled VWV unit is connected to one end of a user-end return water pipe; the other end of the user-end return water pipe is connected to the return water outlet of the user-end.

[0005] Preferably, a circulating water pump is also provided on the return water pipe.

[0006] Preferably, when using the radiator to recover the excess cooling in the pipe gallery, by controlling the rotation speed of the circulating water pump, the water supply pipe provides 45°C water to the water supply inlet of the radiator; and the return water outlet of the radiator provides 40°C return water to the return water pipe.

[0007] Preferably, when using the radiator to recover the excess cooling in the pipe gallery, the water-cooled VWV unit is controlled to provide 7°C cold water to the user end through the user end water supply pipe; and the user end return water pipe is made to provide 12°C return water to the return water inlet of the water-cooled VWV unit.

[0008] Preferably, the return water pipe is also connected to one end of the water supply pipe; the other end of the water supply pipe is connected to the softening water tank.

[0009] Preferably, a water supply pump is also provided on the water supply pipe.

[0010] Preferably, the softened water tank is connected to a water softener, and municipal water enters the softened water tank after being processed by the water softener.

[0011] Preferably, when the radiator is used to recover the excess cold in the pipe gallery, the user end is the cooling end, and the radiator provides cooling water to the water-cooled VWV unit through the return pipe; when the radiator is used to recover the excess heat in the pipe gallery, the user end is the heating end, and the radiator provides heat source water to the water-cooled VWV unit through the return pipe.

[0012] Further preferably, the waste cooling or waste heat recovery system for solving condensation in the pipe gallery further includes a ventilation unit, which is installed in the pipe gallery and is used to further dry the pipe gallery through ventilation.

[0013] Preferably, the radiator is installed on the wall inside the pipe gallery.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The waste heat or cooling recovery system for condensation in pipe corridors, described in this utility model, utilizes the terminal cooling fins of the VWV refrigeration units to be located on the inner wall of the pipe corridor, thereby recovering the excess cooling from the corridor. This simultaneously raises the air temperature within the corridor and gradually reduces the saturation of the moist air. This allows any accumulated moisture within the cabin and any condensation on the walls to evaporate and transfer into the air. Combined with ventilation, this further dries the cabin, creating a virtuous cycle.

[0016] The utility model recovers the residual cold in the pipe gallery and solves the problem of condensation in the pipe gallery, plays an important protective role in the safe operation of the pipe gallery, and has good energy-saving benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the specific implementation methods of this application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0018] Figure 1 It is a structural schematic diagram of the waste cooling or waste heat recovery system for solving condensation in the pipe gallery described in the present invention. DETAILED DESCRIPTION

[0019] The present invention is described in more detail below to facilitate understanding of the present invention.

[0020] like Figure 1 As shown, the waste cooling or waste heat recovery system for solving condensation in the pipe gallery described in the utility model includes a radiator 1 and a water-cooled VWV unit 6. The radiator 1 is installed in the pipe gallery 10 and is used to recover the waste cooling or waste heat in the pipe gallery; the water supply inlet 2 of the radiator 1 is connected to one end of the water supply pipe 4; the other end of the water supply pipe 4 is connected to the water outlet of the water-cooled VWV unit 6; the return water outlet 3 of the radiator 1 is connected to one end of the return water pipe 5; the other end of the return water pipe 5 is connected to the return water port of the water-cooled VWV unit 6; the water supply outlet of the water-cooled VWV unit 6 is connected to one end of the user-end water supply pipe 8; the other end of the user-end water supply pipe 8 is connected to the water inlet of the user-end 7; the return water inlet of the water-cooled VWV unit 6 is connected to one end of the user-end return water pipe 9; the other end of the user-end return water pipe 9 is connected to the return water port of the user-end 7.

[0021] Preferably, a circulating water pump 11 is further provided on the return water pipe 5 .

[0022] Preferably, when using the radiator 1 to recover the excess coolness in the pipe gallery 10, by controlling the rotation speed of the circulating water pump 11, the water supply pipe 4 provides 45°C water to the water supply inlet 2 of the radiator 1; and the return water outlet 3 of the radiator 1 provides 40°C return water to the return water pipe 5.

[0023] Preferably, when using the radiator 1 to recover the excess cold in the pipe gallery 10, the water-cooled VWV unit 6 is controlled to provide 7°C cold water to the user end 7 through the user end water supply pipe 8; and the user end return water pipe 9 is made to provide 12°C return water to the return water inlet of the water-cooled VWV unit 6.

[0024] Preferably, the return water pipe 5 is also connected to one end of the water supply pipe 12 ; the other end of the water supply pipe 12 is connected to the softened water tank 14 .

[0025] Preferably, a water supply pump 13 is further provided on the water supply pipe 12 .

[0026] Preferably, the softened water tank 14 is connected to the water softener 15 , and the municipal water 16 enters the softened water tank 14 after being processed by the water softener 15 .

[0027] Preferably, when the radiator 1 is used to recover the excess cold in the pipe gallery, the user end 7 is the cooling end, and the radiator 1 provides cooling water to the water-cooled VWV unit 6 through the return pipe 5; when the radiator 1 is used to recover the excess heat in the pipe gallery, the user end 7 is the heating end, and the radiator 1 provides heat source water to the water-cooled VWV unit 6 through the return pipe 5.

[0028] Further preferably, the waste cooling or waste heat recovery system for solving condensation in the pipe gallery further includes a ventilation unit, which is installed in the pipe gallery 10 and is used to further dry the pipe gallery through ventilation.

[0029] Preferably, the radiator 1 is installed on a wall inside the pipe gallery 10 .

[0030] Preferably, the actual heat dissipation of the radiator 1 under ventilation conditions complies with a first heat dissipation equation, which is specifically:

[0031] Q=(U*A*ΔT) / 2+K1*F1*Δt1+K2*F2*Δt2;

[0032] Wherein, Q is the actual heat dissipation of the radiator, in watts, W;

[0033] U is the heat transfer coefficient of the radiator based on the inner surface area;

[0034] A is the heat transfer area of the inner surface of the heat dissipation pipe of the radiator, in square meters (㎡);

[0035] ΔT is the convective heat transfer temperature difference of the radiator, in degrees Celsius;

[0036] K1 is the heat transfer coefficient between the radiator and the wall, expressed in Watts / (square meter·Kelvin), W / (㎡·K);

[0037] K2 is the heat transfer coefficient between air and wall, expressed in Watts / (square meter·Kelvin), W / (㎡·K);

[0038] F1 is the contact area between the radiator and the wall, in square meters (㎡);

[0039] F2 is the contact area between the air and the wall within the vertical projection of the radiator on the wall, in square meters (㎡);

[0040] Δt1 is the heat transfer temperature difference between the radiator and the wall, in degrees Celsius;

[0041] Δt2 is the heat transfer temperature difference between the air and the wall within the vertical projection range of the radiator on the wall, in degrees Celsius;

[0042] In the first heat dissipation equation:

[0043]

[0044]

[0045]

[0046] Among them, h i is the convection heat transfer coefficient in the heat dissipation pipe of the radiator, in W / ㎡·℃;

[0047] h o is the external convection heat transfer coefficient of the heat dissipation pipe of the radiator, in W / ㎡·℃;

[0048] r i is the thermal resistance of the dirt inside the heat pipe of the radiator, in m2·℃ / W;

[0049] r o is the heat resistance of the heat dissipation pipe of the radiator, in m2·℃ / W;

[0050] d i is the inner diameter of the heat dissipation pipe of the radiator, in meters, m;

[0051] L is the length of the heat dissipation pipe of the radiator, in meters (m);

[0052] d o is the outer diameter of the heat dissipation pipe of the radiator, in meters, m;

[0053] d f is the diameter of the circular fin of the radiator, in meters, m;

[0054] δ is the wall thickness of the heat dissipation pipe of the radiator, in meters (m);

[0055] δ f is the fin thickness of the radiator, in meters, m;

[0056] λ is the metal thermal conductivity of the heat pipe of the radiator, in W / m·°C;

[0057] η f is the fin efficiency;

[0058] n f is the number of fins per meter of the heat dissipation pipe of the radiator;

[0059] l is the fin height of the radiator, in meters, m;

[0060] C is the circumference of the fin cross section of the radiator, in meters, m;

[0061] f is the cross-sectional area of the fin of the radiator, in meters, m;

[0062] th() represents the hyperbolic tangent function;

[0063] The actual heat dissipation of the radiator 1 under non-ventilated working conditions complies with the second heat dissipation equation, which is specifically:

[0064] Q=K1*F1*Δt1+K2*F2*Δt2.

[0065] The first and second heat dissipation equations proposed in this application are obtained through a large number of experiments and numerical simulations and fitted using Octave software. The first and second heat dissipation equations affect structural parameters such as the heat transfer area of the inner surface of the heat pipe of the radiator 1, the contact area between the radiator and the wall, the contact area between the air and the wall within the vertical projection of the radiator on the wall, the inner diameter, length, and outer diameter of the heat pipe of the radiator, the diameter of the circular fins of the radiator, the wall thickness of the heat pipe of the radiator, the thickness of the fins of the radiator, the number of fins per meter of the heat pipe of the radiator, the fin height of the radiator, the circumference of the fin cross-section, and the fin cross-sectional area, and thus have a significant limiting effect on the structure of the radiator 1. During the design process, the actual heat dissipation of the radiator 1 is used as a known design parameter to make specific selections based on the above structural parameters, and the design selection efficiency is improved by at least 56.9%.

[0066] The method for recovering excess cooling in a pipe gallery by using the excess cooling or excess heat recovery system for solving condensation in the pipe gallery comprises the following steps:

[0067] S1. Install the radiator 1 in the pipe gallery 10; connect the water supply inlet 2 of the radiator 1 to one end of the water supply pipe 4; connect the other end of the water supply pipe 4 to the water outlet of the water-cooled VWV unit 6; connect the return water outlet 3 of the radiator 1 to one end of the return water pipe 5; connect the other end of the return water pipe 5 to the return water outlet of the water-cooled VWV unit 6; and provide a circulating water pump 11 on the return water pipe 5.

[0068] S2. Connect the water supply outlet of the water-cooled VWV unit 6 to one end of the user-side water supply pipe 8; connect the other end of the user-side water supply pipe 8 to the water inlet of the user-side 7;

[0069] S3, connecting the return water inlet of the water-cooled VWV unit 6 to one end of the user-end return water pipe 9; the other end of the user-end return water pipe 9 is connected to the return water port of the user end 7;

[0070] S4. By controlling the rotation speed of the circulating water pump 11, the water supply pipe 4 provides 45°C water to the water supply inlet 2 of the radiator 1; and the return water outlet 3 of the radiator 1 provides 40°C return water to the return water pipe 5;

[0071] S5, controlling the water-cooled VWV unit 6 to provide 7°C cold water to the user end 7 through the user end water supply pipe 8; and causing the user end return water pipe 9 to provide 12°C return water to the return water inlet of the water-cooled VWV unit 6;

[0072] S6. Control the operation of the ventilation unit to further dry the pipe gallery through ventilation.

[0073] The waste cooling or waste heat recovery system for solving condensation in the pipe gallery described in the utility model solves the condensation problem in the pipe gallery while recovering the waste cooling in the pipe gallery, plays an important protective role in the safe operation of the pipe gallery, and has good energy-saving benefits.

[0074] The above describes the preferred embodiments of the present invention, but it is not intended to limit the present invention. Those skilled in the art may make improvements and changes to the embodiments disclosed herein without departing from the scope and spirit of the present invention.

Claims

1. A waste cooling or waste heat recovery system for solving condensation in pipe corridors, characterized in that: The waste cooling or waste heat recovery system for solving condensation in the pipe gallery includes a radiator and a water-cooled VWV unit. The radiator is installed in the pipe gallery and is used to recover the waste cooling or waste heat in the pipe gallery; the water supply inlet of the radiator is connected to one end of the water supply pipe; the other end of the water supply pipe is connected to the water outlet of the water-cooled VWV unit; the return water outlet of the radiator is connected to one end of the return water pipe; the other end of the return water pipe is connected to the return water outlet of the water-cooled VWV unit; the water supply outlet of the water-cooled VWV unit is connected to one end of the user-end water supply pipe; the other end of the user-end water supply pipe is connected to the water inlet of the user-end; the return water inlet of the water-cooled VWV unit is connected to one end of the user-end return water pipe; the other end of the user-end return water pipe is connected to the return water outlet of the user-end.

2. The waste cooling or waste heat recovery system for solving condensation in pipe gallery according to claim 1 is characterized in that: The return water pipe is also provided with a circulating water pump.

3. The waste cooling or waste heat recovery system for solving condensation in pipe gallery according to claim 2 is characterized in that: When using the radiator to recover the excess cooling in the pipe gallery, by controlling the rotation speed of the circulating water pump, the water supply pipe provides 45°C water to the water supply inlet of the radiator; and the return water outlet of the radiator provides 40°C return water to the return water pipe.

4. The waste cooling or waste heat recovery system for solving condensation in pipe gallery according to claim 1 is characterized in that: When using the radiator to recover the excess cooling in the pipe gallery, the water-cooled VWV unit is controlled to provide 7°C cold water to the user end through the user end water supply pipe; and the user end return water pipe provides 12°C return water to the return water inlet of the water-cooled VWV unit.

5. The waste cooling or waste heat recovery system for solving condensation in pipe gallery according to claim 1 is characterized in that: The return water pipe is also connected to one end of the water supply pipe; the other end of the water supply pipe is connected to the softening water tank.

6. The waste cooling or waste heat recovery system for solving condensation in the pipe gallery according to claim 5 is characterized in that: The water supply pipe is also provided with a water supply pump.

7. The waste cooling or waste heat recovery system for solving condensation in pipe gallery according to claim 5 is characterized in that: The softened water tank is communicated with the water softener.

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