CN102175715A - Thermal response testing method and device of dual-condition rock and soil mass - Google Patents
Thermal response testing method and device of dual-condition rock and soil mass Download PDFInfo
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- CN102175715A CN102175715A CN 201110029918 CN201110029918A CN102175715A CN 102175715 A CN102175715 A CN 102175715A CN 201110029918 CN201110029918 CN 201110029918 CN 201110029918 A CN201110029918 A CN 201110029918A CN 102175715 A CN102175715 A CN 102175715A
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Abstract
The invention discloses a thermal response testing method and device of dual-condition rock and soil mass, belonging to a new method and device for thermal response test of rock and soil in a ground source heat pump. Cold water and hot water prepared at the condensing side and evaporating side of a water cooling chiller or a ground source heat pump unit are used for respectively connecting to test holes for releasing heat and absorbing heat in test, so that the rock and soil mass thermal response conditions under two conditions are simulated and the heat characteristic parameters of the rock and soil mass are obtained synchronously. The method and device disclosed by the invention have the beneficial effects that the tests for two conditions are completed conveniently; time and labours are saved; and the obtained parameters under the two conditions have actual guiding significances in designing ground source pump system.
Description
Technical field
The invention discloses a kind of duplexing condition rock soil mass thermal response test method and test unit, belong to a kind of method improvement that is applied to the ground thermal response test of earth-source hot-pump system.
Background technology
" earth-source hot-pump system engineering legislation GB50366-2005 " (version in 2009) increased appendix C ground thermal response test portion content newly, the clear and definite ground thermal response test related request of earth-source hot-pump system recommends " permanent heat flow method " as the test implementation method.
" permanent heat flow method " is to apply the mode of certain heating power by electric heater to rock soil mass, carries out the thermal response test.The theoretical foundation of this method is line source model, its explicit physical meaning, easy to understand.The ground pipe laying out temperature that obtains of test can go out the thermal physical property parameter of rock soil mass by inverse conduction solution inverse.Data processing method has two kinds of linear fitting and parameter estimation methods, and the former principle and computation process are simple, and the latter needs computer programming, and is comparatively complicated.Present stage, ground thermal response test international and China all was to adopt this method to test, and was widely used.
" constant temperature method " method is to keep inflow temperature certain in the test, manages to keep the inlet temperature in loop constant, obtains heat in the loop by flow that records and return water temperature again, does not see enough detailed description for the details of test.The heating thermal source that adopts is heating or heat pump.Owing to will must have control device to regulate in heat (cold) source part.The main target of this method is to determine the heat transfer capacity of boring unit linear meter(lin.m.) under " stablizing " state.
Summary of the invention
The method and the device that the object of the present invention is to provide a kind of novel rock soil mass thermal response to test, can test simultaneously the heat release in summer and winter the heat-obtaining operating mode, convenient and practical, economical and practical, time saving and energy saving, only can test heat release in summer operating mode in the existing rock soil mass thermal response test and test defective such as wasting time and energy of two kinds of operating mode methods and device simultaneously to remedy.
For solving the problems of the technologies described above, the technical scheme of method of testing of the present invention is:
A kind of duplexing condition rock soil mass thermal response test method, it is characterized in that: utilize the condensation side of water-cooled handpiece Water Chilling Units or earth source heat pump unit and the hot and cold water of evaporation side preparation, instrument connection with test heat release and heat absorption is connected respectively, realization simulate simultaneously two kinds under the operating mode rock soil mass thermal response situation and obtain the rock soil mass thermal characteristic parameter.
The condensation side Inlet and outlet water temperature of described water-cooled handpiece Water Chilling Units or earth source heat pump unit is 30/35 ℃, and evaporation side Inlet and outlet water temperature is 10/5 ℃.
Test unit of the present invention is, comprise a water-cooled handpiece Water Chilling Units or earth source heat pump unit, a condensation side water circulating pump, evaporation side water circulating pump, first temperature sensor, second temperature sensor, three-temperature sensor, the 4th temperature sensor, first flow sensor, second flow sensor, first pressure transducer, second pressure transducer, the 3rd pressure transducer, the 4th pressure transducer, data transmission link, data acquisition module and a flow-control module
A side heat interchanger and a water circulating pump of described water-cooled handpiece Water Chilling Units or earth source heat pump unit are connected in series by connecting pipe, first temperature sensor, first flow sensor and first pressure transducer are connected in the heat exchanger entrance place of water-cooled handpiece Water Chilling Units or earth source heat pump unit one side, and second temperature sensor and second pressure transducer are connected in the exit of the heat interchanger of water-cooled handpiece Water Chilling Units or earth source heat pump unit one side; Opposite side side heat interchanger and another water circulating pump are connected in series by connecting pipe, three-temperature sensor, second flow sensor and the 3rd pressure transducer are connected in the heat exchanger entrance place of water-cooled handpiece Water Chilling Units or earth source heat pump unit opposite side, and the 4th temperature sensor and the 4th pressure transducer are connected in the exit of the heat interchanger of water-cooled handpiece Water Chilling Units or earth source heat pump unit opposite side; All temperature sensors, pressure transducer and flow sensor all are connected in data acquisition module, and the water circulating pump water circulating pump all is connected in flow-control module, and data transmission link is connected data acquisition module with flow-control module.
The ability that picks and places heat of proving installation of the present invention on-site underground rock soil mass of test in rock soil mass thermal response test is for the design of earth-source hot-pump system provides foundation effectively accurately.
Beneficial effect:
Superior performance, convenient and practical, time saving and energy saving.Existing testing apparatus only can be tested the heat release operating mode, also needs to be equipped with two kinds of systems if will carry out the test of two kinds of operating modes, comparatively trouble.And novel test method provided by the invention and the device can test simultaneously heat release in summer operating mode and winter the heat-obtaining operating mode, for the tester provides convenience.
Description of drawings
Fig. 1 is a method of testing schematic diagram of the present invention.
Fig. 2 is a proving installation connection diagram of the present invention.
Embodiment
Describe below in conjunction with the embodiment of accompanying drawing method of the present invention and device.
The testing tool of accompanying drawing is a device of the present invention, comprises a small-sized water-cooled handpiece Water Chilling Units or earth source heat pump unit 1, hot water side water circulating pump 2, cold water side water circulating pump 3, first temperature sensor 4, second temperature sensor 5, three-temperature sensor 6, the 4th temperature sensor 7, first flow sensor 8, second flow sensor 9, first pressure transducer 10, second pressure transducer 11, the 3rd pressure transducer 12, the 4th pressure transducer 13, data transmission link 14, data acquisition module 15 and a flow-control module 16.
In the test process, need to drill at least 2 instrument connections, be respectively applied for test heat release operating mode and heat-obtaining operating mode, the both sides heat exchanger tube of pipe and testing tool is connected to form the test loop of sealing under the test, and circulatory mediator drives cycle heat exchange therein by ebullator.Data acquisition module is responsible for gathering the data of all temperature, pressure and flow, and data on flows is fed back to the flow that flow-control module is controlled both sides by data transmission link.The data later stage that obtains of data acquisition system (DAS) record handles and can obtain corresponding rock soil mass thermal physical property parameter.
(1) test platform is built
As accompanying drawing 2, the water inlet pipe and water outlet pipe of handpiece Water Chilling Units or heat pump main frame 1 condensation side is connected with first mouthful of instrument connection import and export, the evaporation side water inlet pipe and water outlet pipe of main frame 1 is connected with second mouthful of instrument connection, and this moment, summer was tested operating mode in first mouthful of instrument connection simulation, and second mouthful of instrument connection simulated and tested operating mode winter.
(2) testing apparatus starts
At first open condensation side water pump 2, next opens evaporation side water pump 3, opens main frame 1 at last.
(3) the test operating mode is set
Main frame condensation side return water temperature (temperature point 4) is set in 25～35 ℃ (according to test requests), the simulation summer condition; Main frame evaporation side return water temperature (temperature point 6) is set in 10～15 ℃ (according to test request) simulation winter condition.
Because the heat of the evaporation side of main frame and condensation side is proportional in the same time, therefore after a certain side operating mode of main frame reaches earlier and sets operating mode, the heat of opposite side is restricted, its water temperature operating mode does not often reach any setting requirement, therefore before the host test operating mode is set, need the equilibrium temperature operating mode at main frame two ends is carried out initial estimate, all reach the setting operating mode with inflow temperature after guaranteeing main frame both sides stable operation.According to law of conservation of energy, the heat of handpiece Water Chilling Units or heat pump main frame condensation side and evaporator is proportional.
Wherein
Be the heat of vaporizer side,
Be the heat of vaporizer side,
Be coefficient of refrigerating performance.
According to GB 50366-2005/2009 " earth-source hot-pump system engineering legislation " appendix c: the instrument connection exchange capability of heat satisfies following formula.
Then have
(4)
In the formula
,
Be instrument connection summer, winter condition exchange capability of heat (W/m);
,
For instrument connection inflow temperature in summer operating mode (temperature point 5), inflow temperature in winter (temperature point 7) operating mode (℃);
For underground ground medial temperature (℃);
Heat exchange thermal resistance (W/ (mK)) for instrument connection.
Cooling condition and heating condition are in same test instrument connection heat exchange thermal resistance during the time
Be consistent, so the instrument connection water inlet is directly proportional with the heat transfer temperature difference and the instrument connection exchange capability of heat of ground.
In the test process, the heat ratio of main frame evaporation side and condensation side is consistent with two mouthfuls of instrument connection heat ratios, then has
In conjunction with formula (1)～(5), then have
Can determine the setting operating mode at main frame two ends by formula (7), in actual the enforcement, main frame one side is set by the standard testing operating mode earlier, and opposite side by formula (7) is determined.
Host setting be the leaving water temperature (inflow temperature of main frame, temperature point 4 or 6) of instrument connection, instrument connection inflow temperature (temperature point 5 or 7) can convert by formula (8), (9),
(9)
In the formula
,
For instrument connection simulation summer, leaving water temperature operating mode in winter (main frame inflow temperature, temperature point 5 or 7) (℃);
Be the instrument connection heat transfer temperature difference of main frame condensation side, generally get 5 ℃.
Be the instrument connection heat transfer temperature difference of main frame evaporation side, generally get 3 ℃.
(4) Operational Data Analysis
Behind the device start, the water temperature in the evaporation side loop of main frame (temperature point 6,7) progressively reduces, and the water temperature of condensation side loop (temperature point 4,5) progressively raises, and the return water temperature (temperature point 4,6) of last main frame both sides successively reaches steady working condition.Example: the water route initial temperature of supposing evaporation side and condensation side all is 20 ℃, and after testing apparatus was opened, the backwater of evaporation side (temperature point 6) reached 10 ℃ of design temperatures earlier, and condensation side test this moment operating mode can be calculated definite according to formula (6).If
=5,
=18 ℃, condensation side is set the test operating mode and is got 26.2 ℃.
(5) test data is handled
According to the measurement method theory, the constant operation of the inflow temperature of instrument connection 48h, the heat exchange value of the instrument connection of this moment is as design conditions heat exchange value
In the formula
Be the exchange capability of heat (W/m) under the instrument connection standard design operating mode;
Be the specific heat of water that circulates in the instrument connection (J/(kg ℃));
Be the mass rate kg/s of instrument connection, measure by flow sensor 8,9;
The inflow temperature of instrument connection during for stable operation 48h (℃), temperature sensor 5 or 7 is measured,
The leaving water temperature of instrument connection during for stable operation 48h, temperature sensor 4 or 6 is measured.
(6) the standard design operating mode converts with the test operating mode
The test operating mode often is not the standard design operating mode, can adopt formula (11～13) to be converted into instrument connection exchange capability of heat under the standard design operating mode testing under the operating mode.
Then have
In the formula
,
Be instrument connection exchange capability of heat (W/m) under instrument connection exchange capability of heat, the standard design operating mode under the test operating mode;
,
The instrument connection inflow temperature of setting under the instrument connection inflow temperature of setting under the operating mode for test, the standard design operating mode (℃).
Claims (3)
1. duplexing condition rock soil mass thermal response test method, it is characterized in that: utilize the condensation side of water-cooled handpiece Water Chilling Units or earth source heat pump unit and the hot and cold water of evaporation side preparation, instrument connection with test heat release and heat absorption is connected respectively, realization simulate simultaneously two kinds under the operating mode rock soil mass thermal response situation and obtain the rock soil mass thermal characteristic parameter.
2. duplexing condition rock soil mass thermal response test method according to claim 1, it is characterized in that: the condensation side Inlet and outlet water temperature of described water-cooled handpiece Water Chilling Units or earth source heat pump unit is 30/35 ℃, and evaporation side Inlet and outlet water temperature is 10/5 ℃.
3. test unit that is used for the described duplexing condition rock soil mass thermal response test method of claim 1, it is characterized in that: comprise a water-cooled handpiece Water Chilling Units or earth source heat pump unit (1), a condensation side water circulating pump (2), an evaporation side water circulating pump (3), first temperature sensor (4), second temperature sensor (5), three-temperature sensor (6), the 4th temperature sensor (7), first flow sensor (8), second flow sensor (9), first pressure transducer (10), second pressure transducer (11), the 3rd pressure transducer (12), the 4th pressure transducer (13), data transmission link (14), data acquisition module (15) and flow-control module (16)
The one side heat interchanger and a water circulating pump (2) of described water-cooled handpiece Water Chilling Units or earth source heat pump unit (1) are connected in series by connecting pipe, first temperature sensor (4), first flow sensor (8) and first pressure transducer (10) are connected in the heat exchanger entrance place of water-cooled handpiece Water Chilling Units or earth source heat pump unit (1) one side, and second temperature sensor (5) and second pressure transducer (11) are connected in the exit of the heat interchanger of water-cooled handpiece Water Chilling Units or earth source heat pump unit (1) one side; Opposite side side heat interchanger and another water circulating pump (3) are connected in series by connecting pipe, three-temperature sensor (6), second flow sensor (9) and the 3rd pressure transducer (12) are connected in the heat exchanger entrance place of water-cooled handpiece Water Chilling Units or earth source heat pump unit (1) opposite side, and the 4th temperature sensor (7) and the 4th pressure transducer (13) are connected in the exit of the heat interchanger of water-cooled handpiece Water Chilling Units or earth source heat pump unit (1) opposite side; All temperature sensors, pressure transducer and flow sensor all are connected in data acquisition module (15), water circulating pump (2) water circulating pump (3) all is connected in flow-control module (16), and data transmission link (14) is connected data acquisition module (15) with flow-control module (16).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091358A (en) * | 2011-11-08 | 2013-05-08 | 同济大学 | Indoor model test apparatus for ground source heat pump rock soil thermal response testing and application thereof |
| CN103808755A (en) * | 2012-11-07 | 2014-05-21 | 中航勘察设计研究院有限公司 | Rock and earth mass thermal response testing equipment |
| CN105716948A (en) * | 2016-03-08 | 2016-06-29 | 中国科学院南海海洋研究所 | System and method for testing temperature response coefficient of heat insulation stress change of underground rock |
| CN106442618A (en) * | 2016-10-31 | 2017-02-22 | 山东省鲁南地质工程勘察院 | Double-working-condition constant-power rock soil thermal response site test device and three-level control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103091358A (en) * | 2011-11-08 | 2013-05-08 | 同济大学 | Indoor model test apparatus for ground source heat pump rock soil thermal response testing and application thereof |
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| CN103808755A (en) * | 2012-11-07 | 2014-05-21 | 中航勘察设计研究院有限公司 | Rock and earth mass thermal response testing equipment |
| CN105716948A (en) * | 2016-03-08 | 2016-06-29 | 中国科学院南海海洋研究所 | System and method for testing temperature response coefficient of heat insulation stress change of underground rock |
| CN105716948B (en) * | 2016-03-08 | 2017-05-17 | 中国科学院南海海洋研究所 | System and method for testing temperature response coefficient of heat insulation stress change of underground rock |
| CN106442618A (en) * | 2016-10-31 | 2017-02-22 | 山东省鲁南地质工程勘察院 | Double-working-condition constant-power rock soil thermal response site test device and three-level control method |
| CN106442618B (en) * | 2016-10-31 | 2023-08-29 | 山东省鲁南地质工程勘察院 | Double-working-condition constant-power rock-soil thermal response site test device and three-level control method |
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Application publication date: 20110907 |