CN102788814B - Method for measuring thermal response speed in hot-summer and cold-winter areas - Google Patents

Method for measuring thermal response speed in hot-summer and cold-winter areas Download PDF

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Publication number
CN102788814B
CN102788814B CN201210300968.7A CN201210300968A CN102788814B CN 102788814 B CN102788814 B CN 102788814B CN 201210300968 A CN201210300968 A CN 201210300968A CN 102788814 B CN102788814 B CN 102788814B
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test
temperature
heat
measuring
air
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CN102788814A (en
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曹毅然
杨建荣
顾红跃
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SHANGHAI JIANKE BUILDING ENERGY SERVICE EVALUATION OFFICE
Shanghai Building Science Research Institute Group Co Ltd
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SHANGHAI JIANKE BUILDING ENERGY SERVICE EVALUATION OFFICE
Shanghai Building Science Research Institute Group Co Ltd
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Abstract

The invention discloses a method for measuring thermal response speed in hot-summer and cold-winter areas. A measuring device implementing the method comprises a protection box, measuring boxes, a cold water unit, fan coils, electric heaters and thermal insulation systems. The measuring boxes are disposed in the protection box. The method includes calibration steps: a first operation condition is a natural ventilation condition, surface temperature of the two measuring boxes keeps consistent to indoor air temperature in the natural ventilation state; and a second operation condition is an air-conditioning condition, the outer thermal insulation system and the inner thermal insulation system are mounted on the two measuring boxes used for comparison measurement respectively, an air-conditioning measuring and controlling system is started, temperatures in the measuring boxes and the protection box keep at set temperature, temperature difference of each measuring point is kept within 0.5 DEG C, inner surface wind speed of the measuring boxes is controlled to be smaller than 0.3 m/s, and response speeds of the inner surface temperatures of the inner thermal insulation system and the outer thermal insulation system of the two measuring boxes and air temperatures in the measuring boxes to the set temperature are compared.

Description

A kind of Xia Redong cryogenic region thermal response testing method
Technical field
The present invention relates to building energy conservation technical field of measurement and test, particularly a kind of Xia Redong cryogenic region thermal response testing method.
Background technology
The large percentage that in the building air conditioning load of Xia Redong cryogenic region, wall load accounts for, reduces the key that wall load becomes building energy conservation.Conventional construction wall heat preserving mode has the various ways such as outer insulation, middle insulation, interior insulation and self-heat conserving at present.Under unsteady state condition, due to the difference of different heat preserving modes in the hot physical property of indoor material, the hot dynamic perfromance of building enclosure is changed, indoor temperature-responsive during causing air-conditioning is very different, for adopting intermittent air conditioning systems pattern building, it is extremely important that the selection of heat preserving mode just seems.
In addition, the method for operation of building air conditioning equipment also has a significant impact for thermal response speed.Xia Redong cryogenic region building air conditioning equipment mostly is distributing or half centralized, adopts the in the majority of batch (-type) air conditioning operating mode.
It is suitable to the rational important meaning of building heat preservation mode tool in this area to explore, but the described thermal response testing method that also there is no a kind of maturation in prior art, can test under comparative analysis intermittent air conditioning systems pattern, the in the situation that of other term harmonization, the difference of outer insulation and heat preservation system inside internal surface temperature and indoor air temperature response design temperature speed.
Summary of the invention
The object of this invention is to provide a kind of Xia Redong cryogenic region thermal response testing method, in order to solve the test problem of the thermal response speed of building heat insulation system.
Technical scheme of the present invention is, a kind of Xia Redong cryogenic region thermal response testing method, for testing Xia Redong cryogenic region building heat insulation system, in air-conditioning effect, be issued to the reaction time of design temperature with the response speed of the different heat-insulation system internal surface temperatures of comparative analysis and indoor air temperature, the proving installation of this method of testing based on a kind of special use, this proving installation is placed on one can 360 on the rotating disk of degree rotation, described proving installation includes protection cabinet, test casing, handpiece Water Chilling Units, computer platform, switch board, fan coil, electric heater and heat-insulation system, described heat-insulation system is installed on the lighting surface of described test casing, described test casing is placed in described protection cabinet, described fan coil and electric heater are for regulating the temperature in test casing, in described protection cabinet, comprise 2 test casings, described method of testing comprises demarcating steps,
Described demarcating steps, demarcates described test casing according to 2 kinds of operating modes,
The 1st kind of operating mode is natural ventilation operating mode, closes air-conditioning system, and 2 test casings internal surface temperature and indoor air temperature under natural ventilating status are consistent,
The 2nd kind of operating mode is air conditioning condition, 2 test casings of contrast test are installed respectively to outer heat preservation system and heat preservation system inside, start observation and control of Air conditioning system, guarantee to test temperature in casing and protection cabinet and remain on design temperature, each measurement point temperature difference is in 0.5 ℃, control test interior wind speed simultaneously and be less than 0.3m/s
Described method of testing also comprises testing procedure, relatively the response speed of air themperature to design temperature in the internal surface temperature of the heat preservation system inside outer heat preservation system of 2 test casings and test casing.
The present invention is based on specific proving installation a kind of method of testing of thermal response speed of Xia Redong cryogenic region building heat insulation system of maturation is provided.
Accompanying drawing explanation
Fig. 1 is proving installation structure vertical view in the embodiment of the present invention.
Fig. 2 is proving installation structure vertical view in the embodiment of the present invention.
Fig. 3 is that the air-conditioning of proving installation in the embodiment of the present invention forms schematic diagram.
Wherein, 1---handpiece Water Chilling Units, 2---computer platform, 3---switch board, 4---fan coil, 5---electric heater, 6---test casing, 7---protection cabinet, 8---windowpane, 9---level movable door, 10---airduct.
Fig. 4 is the thermal response velometer that uses the heating condition of method of testing of the present invention.
Fig. 5 is the thermal response velometer that uses the cooling condition of method of testing of the present invention.
Fig. 6 is the thermal response velometer that uses the rear heating cycle of first refrigeration of method of testing of the present invention.
Embodiment
As illustrated in fig. 1 and 2, device of the present invention can be positioned at the roof of buildings, near this building, does not have buildings to block sunshine, from being raised to sunset sunshine day, can be irradiated to test board.Whole test board is positioned on a rotating disk, and rotating disk can 360 ° of rotations by driven by motor, and in test process, test board can be followed the tracks of the sun makes test specimen all the time over against the sun.Test board is comprised of two test casings, a protection cabinet, wind-cooled cold-water unit, measurement and an opertaing device and other utility appliance.Test board System planes figure and realistic picture are as follows, wherein in System planes figure 1 be handpiece Water Chilling Units, 2 for computer console, 3 is for switch board, 4 is for fan coil, 5 is for electric heater, 6 is for test casing, 7 is for a kind of for heat-insulation system of protection cabinet, 8, can be windowpane.
Protection cabinet is mainly used to test casing and environment isolation, thereby reduces the heat transfer of test casing and environment.Tank material is selected the good polyurethane of heat-insulating property.At test casing antetheca and end face, leave respectively the hole of two 1.5m * 1.5m, for vertical plane heat-insulation system and roof heat insulation system testing.Test period, protection cabinet and test box temperature remain on design temperature jointly, known except heat-insulation system one side is installed by heat transfer theory, and test all the other each faces of casing and extraneous heat transfer capacity are very little.
Two test casing length sizes are 2m.Their tank material and thickness are identical with protection cabinet.Antetheca and end face also leave two holes the same with protection cabinet.In each test casing, be separately installed with Fans coil pipe unit and an electric heater, fan coil units is used for taking away the heat in room, and electric heater is for the heat in balance room.Simultaneously in order to make measurement result more accurate, at each wall of test casing, post the trace that two heat flow meters measure by wall and conduct heat.
Wind-cooled cold-water unit is positioned at a jiao of test board, and unit refrigerating capacity is 20kW.As shown in Figure 3, for meeting test, under different weather condition, move, wind-cooled cold-water unit is selected two compressors in parallel, generally only needs operation one compressor, when solar radiation obtains that heat is more and when temperature can not be controlled at setting value in casing, two compressors move simultaneously.Wind-cooled cold-water unit is equally applicable to the operation of test in winter, only need first move fan coil units and electric heater, and the circulating water temperature of handpiece Water Chilling Units is brought up to more than 8 ℃, and unit just can move automatically.Because test is carried out in process, return water temperature remains unchanged substantially, so unit can not shut down because of low-temperature protection.
The main measurement instrument quantity of test board and precision thereof are as shown in table 1,2.
The main measurement instrument of table 1 test board and quantity thereof
Platinum resistance Thermopair Electromagnetic flowmeter Heat flow meter Actinometer Three phase electrical parameters general measuring instrument Power transducer
Protection cabinet 1 3 0 0 0 0 0
Test casing 1 3 9 1 12 3 1 1
Test casing 2 3 9 1 12 3 1 1
The main measurement instrument precision of table 2 test board
Platinum resistance Thermopair Electromagnetic flowmeter Heat flow meter Actinometer Three phase electrical parameters general measuring instrument Power transducer
Measuring error 0.1℃ 0.1℃ 0.5% 5% 1% 1% 0.5%
The precision of three phase electrical parameters general measuring instrument refers to error when electric flux is accumulated to 1kWh.
Wherein in protection cabinet and each test casing, place a platinum resistance for measuring spin manifold temperature, then temperature signal is passed to controller, controller is controlled solid-state relay break-make by comparing and measuring temperature value and set temperature value, thereby control electric heater start-stop, reaches the object of stablizing room temperature.In each test casing, two other platinum resistance is for measuring the import and export water temperature of fan coil.In test casing fan coil inlet ductwork, electromagnetic flowmeter survey discharge is installed simultaneously.At each test box house, choose 9 different test points and place thermopair, for guaranteeing that in the process of carrying out of test box house temperature is even.Relatively low due to protection cabinet temperature homogeneity is required, therefore only place 3 thermopairs, guarantee that in protection cabinet, temperature is even.For improving the precision of test, each test cabinet wall posts altogether 12 heat flow meters and conducts heat for measuring the trace of test casing and protection cabinet and environment.Three phase electrical parameters general measuring instrument and power transducer are measured respectively the power of the power consumption of electrical heating accumulative total and blower fan.In addition, outdoor a whole set of Portable Automatic Weather Station of also placing, for measuring outdoor temperature humidity, wind speed, wind direction, surface level intensity of solar radiation, surface level sun diffuse radiation.By surface level sun diffuse radiation test data, can calculate vertical plane sun diffuse radiation.
Experimental testing station is based on test, to arrive the response speed of the different heat-insulation system internal surface temperatures of design temperature time comparative analysis and indoor air temperature.For each test casing, airtight in the situation that, the design temperature in casing can be guaranteed to be achieved by following thermal balance equation:
Q s=Q fc-Q f-Q e-Q wall-Q window-Q l (1)
In formula, Q fcfor fan coil heat exchange quantity, W; Q ffor power of fan, W; Q efor electrical heating amount, W; Q wallfor wall heat transfer amount, W; Q windowfor test casing by windowpane the heat transfer capacity to environment, W; Q lfor each wall leaking heat, W.
Q fc=cρL(t o-t i) (2)
In formula, c is specific heat of water, J/ (kgK); ρ is the density of water, kg/m 3; L is the flow of water, m 3/ s; (t o-t i) be the fan coil Inlet and outlet water temperature difference, K.
Q wall = Σ i = 1 6 q i A i - - - ( 3 )
Q in formula ifor heat flow density, W/m 2; A ifor single wall area, m 2.
Q bw=UF(t e-t r) (4)
The heat transfer coefficient that in formula, U is heat-insulation system, W/ (m 2k); F is hole area, m 2; (t e-t r) be test box internal-external temperature difference, K.
The basic skills of test is method of comparative analysis: before on-test, first test casing was demarcated by two kinds of operating modes, the first is natural ventilation operating mode, close air-conditioning system, the situation of change of two casings the temperature inside the box and hot-fluid under state of nature, mainly make before air-conditioning is opened, internal surface temperature and indoor air temperature in two casings are consistent.The second is air conditioning condition, is mainly that contrast test case is installed respectively to outer heat preservation system and heat preservation system inside.Then start TT&C system, make test carry out guaranteeing to test temperature in casing and protection cabinet in process and remain on design temperature, the each point thermocouple measurement temperature difference is in 0.5 ℃.Control heat-insulation system inside surface wind speed simultaneously and be less than 0.3m/s.Under state, compare at the scene the response speed of air themperature to design temperature in two test box heat preservation system inside internal surface temperatures and case.
Experiment adopts two kinds of heat-preserving wall modes, is respectively interior insulation: porous clay brick+30mmEPS; Outer insulation: 30mmEPS+ porous clay brick.In experimentation, open refrigeration mode when daytime, outdoor temperature was higher, indoor temperature is set 22 ℃, opens heating mode when night, outdoor temperature was lower, and indoor temperature is set as 30 ℃.In experiment, required test parameter is the embedded heat-preserving wall surfaces externally and internally temperature of each casing in two test casings, air themperature and outside air temperature in two tanks.Experiment purpose is in order to compare two kinds of heat-preserving walls, heat-preserving wall internal surface temperature and the response of indoor air temperature to design temperature when test refrigeration, heating mode.Test result is as follows.
Shown in Fig. 4, be heating condition: in casing, design temperature is 30 ℃, 19.8 ℃ of outdoor air medial temperatures.Heat time 17:30-8:00.From heat-preserving wall internal surface temperature, can find out, initial heat-up stage, interior insulation internal surface temperature heating rate is obviously greater than external heat insulating wall internal surface temperature, and after nearly 90 minutes, interior insulation internal surface temperature is stable.After the fluctuation of nearly 12 hours, outer insulation reaches consistent with interior insulation internal surface temperature temperature.
Shown in Fig. 5, be that cooling condition: 10:30-16:30 is refrigeration mode, indoor temperature is set as 22 ℃, and outdoor air medial temperature is 29 ℃.Before refrigeration, two tanks temperature is along with the temperature of air heats up and raises, and when refrigeration starts, inside heat insulation wall body internal surface temperature rate of temperature fall is obviously greater than external heat insulating wall internal surface temperature speed, and through nearly 6 hours, it is consistent that both temperature reach.
Shown in Fig. 6, be that after first freezing, heating cycle: 13:40-17:00 is refrigeration mode, air-conditioner temperature is set as 22 ℃, and outdoor air medial temperature is 27 ℃; 17:00 is heating mode later, and air-conditioner temperature is set as 30 ℃, and outdoor air medial temperature is 18 ℃.Two kinds of patterns of refrigeration heating cycle are successively opened, and experimental result shows that under two kinds of patterns, inside heat insulation wall body internal surface temperature heating rate is all obviously greater than external heat insulating wall internal surface temperature.

Claims (1)

1. Yi Zhong Xia Redong cryogenic region thermal response testing method, for testing Xia Redong cryogenic region building heat insulation system, in air-conditioning effect, be issued to the reaction time of design temperature with the response speed of the different heat-insulation system internal surface temperatures of comparative analysis and indoor air temperature, the proving installation of this method of testing based on a kind of special use, this proving installation is positioned at the roof of buildings, near this building, do not have buildings to block sunshine, from being raised to sunset sunshine day, can be irradiated to described proving installation
This proving installation is positioned on a rotating disk, and rotating disk can 360 ° of rotations by driven by motor, and in test process, proving installation can be followed the tracks of the sun makes test specimen all the time over against the sun,
Described proving installation includes protection cabinet, test casing, handpiece Water Chilling Units, computer platform, switch board, fan coil, electric heater and heat-insulation system, described heat-insulation system is installed on the lighting surface of described test casing, described test casing is placed in described protection cabinet, described fan coil and electric heater are for regulating the temperature in test casing
Described protection cabinet is used for the isolation of described test casing and environment, leaves respectively the hole of two 1.5m * 1.5m at test casing antetheca and end face, for vertical plane heat-insulation system and roof heat insulation system testing,
Described method of testing comprises step,
Experiment adopts two kinds of heat-preserving wall modes, is respectively interior insulation: porous clay brick+30mmEPS;
Outer insulation: 30mmEPS+ porous clay brick,
In experimentation, open refrigeration mode when daytime, outdoor temperature was higher, indoor temperature is set 22 ℃, opens heating mode when night, outdoor temperature was lower, and indoor temperature is set as 30 ℃,
In experiment, required test parameter is the embedded heat-preserving wall surfaces externally and internally temperature of each casing in two test casings, air themperature and outside air temperature in two tanks,
Compare two kinds of heat-preserving walls, heat-preserving wall internal surface temperature and the response of indoor air temperature to design temperature when test refrigeration, heating mode,
It is characterized in that, in described protection cabinet, comprise 2 test casings, described method of testing comprises demarcating steps,
Described demarcating steps, demarcates described test casing according to 2 kinds of operating modes,
The 1st kind of operating mode is natural ventilation operating mode, closes air-conditioning system, and 2 test casings internal surface temperature and indoor air temperature under natural ventilating status are consistent,
The 2nd kind of operating mode is air conditioning condition, 2 test casings of contrast test are installed respectively to outer heat preservation system and heat preservation system inside, start observation and control of Air conditioning system, guarantee to test temperature in casing and protection cabinet and remain on design temperature, each measurement point temperature difference is in 0.5 ℃, control test interior wind speed simultaneously and be less than 0.3m/s
Described method of testing also comprises testing procedure, relatively the speed of air themperature to the response speed of design temperature in the heat preservation system inside of 2 test casings and the internal surface temperature of outer heat preservation system and 2 test casings.
CN201210300968.7A 2012-08-22 2012-08-22 Method for measuring thermal response speed in hot-summer and cold-winter areas Active CN102788814B (en)

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CN104634814B (en) * 2015-02-09 2017-03-01 东北石油大学 Side carries indoor thermal environment experimental provision and the using method of phase-change material curtain wall
CN108152327B (en) * 2018-01-09 2018-12-28 应芝娣 A kind of control method of external window of building thermal insulation performance detection device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101598689A (en) * 2008-06-03 2009-12-09 上海莘阳建筑节能科技开发有限公司 The thermal response testing tool of ground heat exchanger heat-transfer performance is buried in rapid reaction
CN102012699A (en) * 2010-11-05 2011-04-13 东南大学 Thermal response remote test device of low-grade heat source of earth source heat pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101598689A (en) * 2008-06-03 2009-12-09 上海莘阳建筑节能科技开发有限公司 The thermal response testing tool of ground heat exchanger heat-transfer performance is buried in rapid reaction
CN102012699A (en) * 2010-11-05 2011-04-13 东南大学 Thermal response remote test device of low-grade heat source of earth source heat pump

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