CN108414567B - Double dynamic variable temperature heat source ground source heat pump experimental device - Google Patents
Double dynamic variable temperature heat source ground source heat pump experimental device Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
A dual-dynamic variable-temperature heat source ground source heat pump experimental device relates to a ground source heat pump experimental device. The invention aims to solve the technical problem that the existing method for researching the problem of soil heat-moisture migration by using the low-temperature waste heat storage type ground source heat pump technology lacks an experimental device. The invention consists of an outer constant temperature circulating water tank, an inner constant temperature circulating water tank, a U-shaped water pipe, a cylinder, sand and soil temperature and humidity recorder; the inside of the cylinder is fully paved with sand, the plurality of U-shaped water pipes are vertically buried in the sand in the cylinder, and the sensors of the soil temperature and humidity recorder are uniformly arranged in the sand between the adjacent U-shaped water pipes; the water outlet pipe and the water return pipe of the constant temperature circulating water tank are respectively communicated with the two water pipes of the U-shaped water pipe. The device has simple structure and low cost, is particularly suitable for being applied in laboratories, has good heat preservation performance, has less heat exchange with the outside, and has the test accuracy of more than 90 percent.
Description
Technical Field
The invention relates to a ground source heat pump experimental device.
Background
For the severe cold region in north of China, the winter heating load is obviously larger than the summer air conditioning load, the application of the ground source heat pump mainly takes winter heating, and for the long-term operation without any auxiliary ground source heat pump system, the overall reduction of the soil temperature around the ground heat exchanger is obvious, the temperature field is difficult to recover, the system operation efficiency is reduced year by year, and the long-term operation economy is poor. The ground source heat pump technology and the waste heat utilization technology are effectively combined, so that the problems of soil temperature reduction and low ground source heat pump heating efficiency caused by long-term operation of the ground source heat pump in northern areas can be solved, and the national policies of energy conservation and emission reduction are responded. The low-temperature waste heat is effectively stored in the soil through the buried pipe, and the temperature of the heat accumulation in the ground source heat pump system is unstable and the time is discontinuous due to the instability of the waste heat, so that the heat accumulation is dynamic variable-temperature heat accumulation. The ground source heat pump technology can fully and effectively utilize low-grade energy and improve the energy grade. The technology of the ground source heat pump is effectively combined with the technology of waste heat utilization, and low-temperature waste heat is effectively stored in soil through the buried pipe heat exchanger, so that the problem that the total amount of heat stored and released by the ground source heat pump soil is unbalanced throughout the year can be effectively solved, the defect of unstable waste heat can be overcome, and the actual running efficiency and the low-temperature waste heat utilization efficiency of the ground source heat pump are improved. The technology of supplementing low-temperature waste heat to underground soil by using the buried pipe heat exchanger to ensure the efficient operation of the ground source heat pump system is called as a low-temperature waste heat storage type ground source heat pump technology.
The soil heat-moisture migration problem is the core research content of many scholars at present, and the heat migration and the moisture migration of soil are mutually influenced and interacted, so that the research on the low-temperature waste heat accumulation type ground source heat pump technology is necessary for the soil heat-moisture migration problem, the numerical simulation and the experiment synchronous verification are the main means, and the construction of a ground source heat pump experimental system of a double-dynamic variable-temperature heat source for heat accumulation by using low-temperature waste heat is necessary.
Disclosure of Invention
The invention provides a double-dynamic variable-temperature heat source ground source heat pump experimental device, which aims to solve the technical problem that the existing method for researching the problem of soil heat-moisture migration by using the low-temperature waste heat storage type ground source heat pump technology lacks an experimental device.
The invention relates to a double-dynamic variable-temperature heat source ground source heat pump experimental device which consists of an outer-layer constant-temperature circulating water tank 1, an inner-layer constant-temperature circulating water tank 2, a thermometer 3, a flowmeter 4, a valve 5, a U-shaped water pipe 6, a cylinder 7, a heat-insulating plate 8, sand 9 and a soil temperature and humidity recorder 10; the outer-layer constant-temperature circulating water tank 1 and the inner-layer constant-temperature circulating water tank 2 are respectively provided with a circulating water pump;
the cylinder 7 is a hollow cylinder, sand 9 is paved in the cylinder 7, the upper end of the cylinder 7 is sealed with the heat insulation plate 8, a through hole 8-1 is arranged in the center of the upper end face of the heat insulation plate 8, a plurality of through holes 8-1 are uniformly arranged along the circumferential direction on the outer edge of the upper end face of the heat insulation plate 8, a plurality of U-shaped water pipes 6 are vertically buried in the sand 9 in the cylinder 7 through the through holes 8-1 on the upper end face of the heat insulation plate 8, a plurality of sensors 10-1 of soil temperature and humidity recorders 10 are uniformly arranged in the sand 9 between the adjacent U-shaped water pipes 6, and the sensors 10-1 of the soil temperature and humidity recorders 10 are arranged in an up-down multilayer manner;
the first water outlet pipe 2-1 and the first water return pipe 2-2 of the inner constant temperature circulating water tank 2 are respectively communicated with two water pipes of a U-shaped water pipe 6 arranged in the center of the upper end face of the heat insulation plate 8, a valve 5 and a thermometer 3 are respectively arranged on the first water outlet pipe 2-1 and the first water return pipe 2-2 of the inner constant temperature circulating water tank 2, and a flowmeter 4 is arranged on the first water outlet pipe 2-1 of the inner constant temperature circulating water tank 2;
the second water outlet pipe 1-2 and the second water return pipe 1-1 of the outer constant temperature circulating water tank 1 are respectively communicated with two water pipes of all U-shaped water pipes 6 arranged on the outer edge of the upper end face of the heat preservation plate 8, a valve 5 and a thermometer 3 are respectively arranged on the second water outlet pipe 1-2 and the second water return pipe 1-1 of the outer constant temperature circulating water tank 1, and a flowmeter 4 is arranged on the second water outlet pipe 1-2 of the outer constant temperature circulating water tank 1.
According to the dual-dynamic variable-temperature heat source ground source heat pump experimental device, the outer constant-temperature circulating water tank 1 and the inner constant-temperature circulating water tank 2 can respectively and independently control the temperature of water, namely the temperatures of the inner U-shaped water pipe 6 buried in sand 9 in the cylinder 7 and the outer U-shaped water pipe 6 can be independently controlled, the low-temperature waste heat storage type ground source heat pump technology can be simulated, the inner U-shaped water pipe 6 represents a ground source heat pump, the outer U-shaped water pipe 6 represents waste heat, corresponding data are obtained through the soil temperature and humidity recorder 10, the thermometer 3 and the flowmeter 4, numerical simulation of the same parameters is carried out, and the soil heat and humidity migration problem is synchronously verified with the experimental device.
The device has simple structure and low cost, is particularly suitable for being applied in laboratories, has good heat preservation performance, has less heat exchange with the outside, and has the test accuracy of more than 90 percent.
Drawings
FIG. 1 is a schematic top view of a dual dynamic temperature varying heat source ground source heat pump experimental apparatus in accordance with a first embodiment;
fig. 2 is a schematic view of an insulation board 8 in a first embodiment;
fig. 3 is a schematic front view of a cylinder 7 in the dual dynamic temperature-changing heat source ground source heat pump experimental device in the first embodiment.
Detailed Description
The first embodiment is as follows: the embodiment is a double-dynamic variable-temperature heat source ground source heat pump experimental device, as shown in fig. 1-3, and specifically comprises an outer-layer constant-temperature circulating water tank 1, an inner-layer constant-temperature circulating water tank 2, a thermometer 3, a flowmeter 4, a valve 5, a U-shaped water pipe 6, a cylinder 7, a heat-insulating plate 8, sand 9 and a soil temperature and humidity recorder 10; the outer-layer constant-temperature circulating water tank 1 and the inner-layer constant-temperature circulating water tank 2 are respectively provided with a circulating water pump;
the cylinder 7 is a hollow cylinder, sand 9 is paved in the cylinder 7, the upper end of the cylinder 7 is sealed with the heat insulation plate 8, a through hole 8-1 is arranged in the center of the upper end face of the heat insulation plate 8, a plurality of through holes 8-1 are uniformly arranged along the circumferential direction on the outer edge of the upper end face of the heat insulation plate 8, a plurality of U-shaped water pipes 6 are vertically buried in the sand 9 in the cylinder 7 through the through holes 8-1 on the upper end face of the heat insulation plate 8, a plurality of sensors 10-1 of soil temperature and humidity recorders 10 are uniformly arranged in the sand 9 between the adjacent U-shaped water pipes 6, and the sensors 10-1 of the soil temperature and humidity recorders 10 are arranged in an up-down multilayer manner;
the first water outlet pipe 2-1 and the first water return pipe 2-2 of the inner constant temperature circulating water tank 2 are respectively communicated with two water pipes of a U-shaped water pipe 6 arranged in the center of the upper end face of the heat insulation plate 8, a valve 5 and a thermometer 3 are respectively arranged on the first water outlet pipe 2-1 and the first water return pipe 2-2 of the inner constant temperature circulating water tank 2, and a flowmeter 4 is arranged on the first water outlet pipe 2-1 of the inner constant temperature circulating water tank 2;
the second water outlet pipe 1-2 and the second water return pipe 1-1 of the outer constant temperature circulating water tank 1 are respectively communicated with two water pipes of all U-shaped water pipes 6 arranged on the outer edge of the upper end face of the heat preservation plate 8, a valve 5 and a thermometer 3 are respectively arranged on the second water outlet pipe 1-2 and the second water return pipe 1-1 of the outer constant temperature circulating water tank 1, and a flowmeter 4 is arranged on the second water outlet pipe 1-2 of the outer constant temperature circulating water tank 1.
The outer constant temperature circulating water tank 1 and the inner constant temperature circulating water tank 2 of the dual-dynamic variable temperature heat source ground source heat pump experimental device of the embodiment can respectively and independently control the temperature of water, namely, the temperatures of the inner U-shaped water pipe 6 and the outer U-shaped water pipe 6 buried in sand 9 in the cylinder 7 can be independently controlled, the low-temperature waste heat storage type ground source heat pump technology can be simulated, the inner U-shaped water pipe 6 represents the ground source heat pump, the outer U-shaped water pipe 6 represents waste heat, corresponding data are obtained through the soil temperature and humidity recorder 10, the thermometer 3 and the flowmeter 4, numerical simulation of the same parameters is carried out, and the soil heat and humidity migration problem is verified synchronously with the experimental device.
The second embodiment is as follows: the first difference between this embodiment and the specific embodiment is that: the flowmeter 4 is an electromagnetic flowmeter. The other is the same as in the first embodiment.
And a third specific embodiment: this embodiment differs from the first or second embodiment in that: the valve 5 is an electromagnetic valve. The other embodiments are the same as those of the first or second embodiment.
The specific embodiment IV is as follows: this embodiment differs from one of the first to third embodiments in that: the U-shaped water pipe 6 is a PPR pipe. The other is the same as in one of the first to third embodiments.
Fifth embodiment: this embodiment differs from one to four embodiments in that: the cylinder 7 is a stainless steel cylinder. The others are the same as in one to one fourth embodiments.
The invention was verified with the following test:
test one: the test is a double-dynamic variable-temperature heat source ground source heat pump experimental device, as shown in figures 1-3, and specifically comprises an outer-layer constant-temperature circulating water tank 1, an inner-layer constant-temperature circulating water tank 2, a thermometer 3, a flowmeter 4, a valve 5, a U-shaped water pipe 6, a cylinder 7, a heat-insulating plate 8, sand 9 and a soil temperature and humidity recorder 10; the outer-layer constant-temperature circulating water tank 1 and the inner-layer constant-temperature circulating water tank 2 are respectively provided with a circulating water pump;
the cylinder 7 is a hollow cylinder, sand 9 is paved in the cylinder 7, the upper end of the cylinder 7 is sealed with the heat insulation plate 8, a through hole 8-1 is arranged in the center of the upper end face of the heat insulation plate 8, a plurality of through holes 8-1 are uniformly arranged along the circumferential direction on the outer edge of the upper end face of the heat insulation plate 8, a plurality of U-shaped water pipes 6 are vertically buried in the sand 9 in the cylinder 7 through the through holes 8-1 on the upper end face of the heat insulation plate 8, a plurality of sensors 10-1 of soil temperature and humidity recorders 10 are uniformly arranged in the sand 9 between the adjacent U-shaped water pipes 6, and the sensors 10-1 of the soil temperature and humidity recorders 10 are arranged in an up-down multilayer manner;
the first water outlet pipe 2-1 and the first water return pipe 2-2 of the inner constant temperature circulating water tank 2 are respectively communicated with two water pipes of a U-shaped water pipe 6 arranged in the center of the upper end face of the heat insulation plate 8, a valve 5 and a thermometer 3 are respectively arranged on the first water outlet pipe 2-1 and the first water return pipe 2-2 of the inner constant temperature circulating water tank 2, and a flowmeter 4 is arranged on the first water outlet pipe 2-1 of the inner constant temperature circulating water tank 2;
the second water outlet pipe 1-2 and the second water return pipe 1-1 of the outer-layer constant temperature circulating water tank 1 are respectively communicated with two water pipes of all U-shaped water pipes 6 arranged on the outer edge of the upper end face of the heat preservation plate 8, a valve 5 and a thermometer 3 are respectively arranged on the second water outlet pipe 1-2 and the second water return pipe 1-1 of the outer-layer constant temperature circulating water tank 1, and a flowmeter 4 is arranged on the second water outlet pipe 1-2 of the outer-layer constant temperature circulating water tank 1;
the flowmeter 4 is an electromagnetic flowmeter; the valve 5 is an electromagnetic valve; the U-shaped water pipe 6 is a PPR pipe; the cylinder 7 is a stainless steel cylinder.
The outer constant temperature circulating water tank 1 and the inner constant temperature circulating water tank 2 of the dual-dynamic variable temperature heat source ground source heat pump experimental device can respectively and independently control the temperature of water, namely the temperatures of the inner U-shaped water pipe 6 and the outer U-shaped water pipe 6 buried in sand 9 in the cylinder 7 can be independently controlled, the low-temperature waste heat storage type ground source heat pump technology can be simulated, the inner U-shaped water pipe 6 represents the ground source heat pump, the outer U-shaped water pipe 6 represents waste heat, corresponding data are obtained through the soil temperature and humidity recorder 10, the thermometer 3 and the flowmeter 4, numerical simulation of the same parameters is carried out, and the soil heat and humidity migration problem is synchronously verified with the experimental device.
The device for the test has the advantages of simple structure, low cost, good heat preservation performance, less heat exchange with the outside and test accuracy up to more than 90 percent, and is particularly suitable for being applied in laboratories.
Claims (3)
1. The double-dynamic variable-temperature heat source ground source heat pump experimental device is characterized by comprising an outer-layer constant-temperature circulating water tank (1), an inner-layer constant-temperature circulating water tank (2), a thermometer (3), a flowmeter (4), a valve (5), a U-shaped water pipe (6), a cylinder (7), a heat-insulating plate (8), sand (9) and a soil temperature and humidity recorder (10); the outer-layer constant-temperature circulating water tank (1) and the inner-layer constant-temperature circulating water tank (2) are respectively provided with a circulating water pump;
the cylinder (7) is a hollow cylinder, sand (9) is paved inside the cylinder (7), the upper end of the cylinder (7) is sealed with the heat insulation plate (8), a through hole (8-1) is arranged in the center of the upper end face of the heat insulation plate (8), a plurality of through holes (8-1) are uniformly arranged along the circumferential direction outside the upper end face of the heat insulation plate (8), a plurality of U-shaped water pipes (6) are vertically buried in the sand (9) inside the cylinder (7) through the through holes (8-1) on the upper end face of the heat insulation plate (8), a plurality of sensors (10-1) of soil temperature and humidity recorders (10) are uniformly arranged in the sand (9) between the adjacent U-shaped water pipes (6), and the sensors (10-1) of the soil temperature and humidity recorders (10) are arranged in an up-down multilayer mode;
the first water outlet pipe (2-1) and the first water return pipe (2-2) of the inner constant temperature circulating water tank (2) are respectively communicated with two water pipes of a U-shaped water pipe (6) arranged in the center of the upper end face of the heat preservation plate (8), a valve (5) and a thermometer (3) are respectively arranged on the first water outlet pipe (2-1) and the first water return pipe (2-2) of the inner constant temperature circulating water tank (2), and a flowmeter (4) is arranged on the first water outlet pipe (2-1) of the inner constant temperature circulating water tank (2);
the second water outlet pipe (1-2) and the second water return pipe (1-1) of the outer constant temperature circulating water tank (1) are respectively communicated with two water pipes of all U-shaped water pipes (6) arranged on the outer edge of the upper end face of the heat preservation plate (8), a valve (5) and a thermometer (3) are respectively arranged on the second water outlet pipe (1-2) and the second water return pipe (1-1) of the outer constant temperature circulating water tank (1), and a flowmeter (4) is arranged on the second water outlet pipe (1-2) of the outer constant temperature circulating water tank (1);
the flowmeter (4) is an electromagnetic flowmeter;
the valve (5) is an electromagnetic valve.
2. The dual-dynamic variable-temperature heat source ground source heat pump experimental device according to claim 1, wherein the U-shaped water pipe (6) is a PPR pipe.
3. The dual-dynamic variable-temperature heat source ground source heat pump experimental device according to claim 1, wherein the cylinder (7) is a stainless steel cylinder.
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