CN101424598A - Automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method - Google Patents
Automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method Download PDFInfo
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- CN101424598A CN101424598A CNA2008102436679A CN200810243667A CN101424598A CN 101424598 A CN101424598 A CN 101424598A CN A2008102436679 A CNA2008102436679 A CN A2008102436679A CN 200810243667 A CN200810243667 A CN 200810243667A CN 101424598 A CN101424598 A CN 101424598A
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Abstract
The invention belongs to an automatic constant temperature test system for the heat performance of a solar water heater, which comprises a water pipeline system, an electrical control system and a data signal acquisition and analysis system and is characterized in that the water pipeline system is also provided with an automatic constant temperature water device, a backwater circulation utilizing device and a stable-pressure safety device so as to solve the problems of temperature control, heat preservation, and the like in a test process, enable a temperature deviation range of detected water to be controlled within a range from 0.2 DEG C below zero to 0.2 DEG C, and satisfy the detection requirements of the ISO9459-2 standard and the GB/T19141 standard. At the same time, the invention also solves the problems that the full-automatic, multi-station and all-weather detection and the recycling of water sources are difficult, thereby having obvious social benefits and economic benefits.
Description
Technical field
The invention belongs to a kind of solar water heater thermal performance test system, particularly a kind of automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method that can meet international ISO9459-2 standard and GB GB/T19141-2003 standard-required simultaneously.
Background technology
Constantly perfect along with solar water heater national standard system, examination requirements for the correlation technique index of water heater also improves constantly, at present representational have the TRM123 solar water heater test macro that Zhuhai Allianz Electronics Co., Ltd. develops and a upgrading products TRM-2 type solar water heater thermal performance test instrument of exploitation, this product is a solar water heater, solar thermal collector, the solar heat performance testing apparatus that solar heating engineering etc. are desirable, this system adopts system controlled by computer, can be to solar radiation quantity, the each point temperature is monitored and record in real time, and automatic analyzing stored printing test result, now applied at home, product performance index reaches GB12915, GB18708, national standards such as GB17581.But still there is following problem, first, wherein most crucial also is the project that accurately detects according to ISO9459-2 and GB/T19141-2003 standard when being difficult to accomplish " day useful heat " and " on average heat waste factor ", it is the sector technical matters anxious to be solved always, second, the test job amount is big, and testing efficiency is low.The 3rd, because test process needs a large amount of water as working medium, all emit the waste that causes water resource after the test in vain.
Summary of the invention
The present invention will solve following technical matters, at first, because the detection initial temperature of national Specification is 20 ± 0.2 ℃, just because of in test process, the error that guarantees setting value ± 0.2 ℃ is difficulty quite, so this system's emphasis will solve a series of technical barriers such as temperature control in the test process and insulation, the error control that makes detection is in the scope of national standard.Secondly, this system should realize automatically, multistation, round-the-clock detection.The 3rd, need a large amount of water as working medium owing to detect solar water heater, this system will solve recycling of water resource, detects cost thereby reduce to a certain extent.
To comprise thermostatted water pipeline system for solving the problems of the technologies described above this test owner, electric control system and data-signal acquisition analysis system three parts are formed, it is characterized in that water piping system comprises automatic constant-temperature water device, backwater circulation use device and voltage stabilizing safety feature, (1) described automatic constant-temperature water device comprises constant temperature water tank, stirrer, water cooling system, first electric heater, water collector, described stirrer is arranged on the constant temperature water tank top, and described water cooling system comprises surface cooler and refrigeration air-conditioner; First centrifugal water pump and refrigeration air-conditioner form the refrigeration cycle to constant temperature water tank water refrigeration, second centrifugal water pump and surface cooler form another refrigeration cycle to constant temperature water tank water refrigeration, and the heating that first electric heater and second water pump form the heating of constant temperature water tank water follows also loop; (2) described backwater circulation use device comprises the backwater water storage box; After solar water heater tested, the hot water in the solar water heater was through water collector interflow back inflow backwater water storage box, or flowed directly into constant temperature water tank through solenoid valve, and backwater water storage box water is sent into constant temperature water tank by the 3rd water pump through solenoid valve; (3) described voltage stabilizing safety feature connects the level pressure expansion drum at least two bypasses of outlet setting of described water collector behind the process filtrator, is connected to ball valve behind another process electro connecting pressure gauge and the solenoid valve.Described automatic constant-temperature water device also comprises second electric heater and first water circulating pump, forms the inferior heat cycles loop to the heating of constant temperature water tank water.At least be provided with a cover blowing device at the testboard bay place of each solar water heater to be measured.Described blowing device comprises air curtain machine, support, and the air curtain machine is fixed on the support, and support is fixed on the testboard bay of solar water heater.The installation site of described blowing device comprises the front lower place of testboard bay, adopts the metal or the non-metal frame of scalable blowing device blowing angle to support.Described blowing device comprises the level blowing at 180 degree angles to the blowing angle of solar thermal collector.Through water trap and water collector six test station can be set simultaneously between the outlet of described automatic constant-temperature water device and the inlet of backwater circulation use device.When temperature sensor to the duct length of solar water heater inlet less than 0.1m, and when the temperature variation of water met less than 0.01K in the pipeline, this segment pipe insulation material selected for use polyurethane 100mm thick, or rubber and plastic 200mm is thick.
Automatic constant-temperature water device be provided with a constant temperature water tank by with pipeline in first electric heater, second electric heater constitute independently primary and secondary heating circuit respectively, the water cooling system that one cover is made up of surface cooler and refrigeration air-conditioner also is set in pipeline simultaneously, above-mentioned refrigeration is respectively cold-producing medium refrigeration air-conditioner and wind-cooling heat dissipating surface cooler, realizes duplex state by first centrifugal water pump, second centrifugal water pump, solenoid valve.Use surface cooler at ordinary times, cool off with refrigeration air-conditioner when water temperature is higher.Water temperature in the even case of stirrer also is equipped with on constant temperature water tank case top.
The backwater circulation use device is by being provided with the recovery and reuse of backwater water storage box realization to test water.
The voltage stabilizing safety feature constitutes the pipeline loop of voltage regulation by filtrator and level pressure expansion drum, and electro connecting pressure gauge and solenoid valve constitute two-way voltage stabilizing emergency bypass and play the effect of carrying out voltage stabilizing and safety relief respectively by level pressure expansion drum and ball valve.
The present invention is owing to made up two masters with constant temperature water tank, inferior heating and two are air-cooled, cold-producing medium is water cycle independently separately, and backwater circulation use device and voltage stabilizing safety feature, thereby solved constant temperature water tank, the coarse adjustment of water temperature and fine setting in the pipeline, setting by above device, guaranteed equipment operation safety, realized low cost, water saving, the purpose of economize on electricity, also effectively reduce labour intensity and artificial factor simultaneously, improved system's automatic control level greatly, make and to realize from now on system being realized collecting and distributing control by computer module, and set up meteorological condition, the user relevant information data storehouses such as custom of fetching water are for computer software design and establishment provide reliable assurance.
Description of drawings
Fig. 1 is an automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method structure principle chart of the present invention.
Fig. 2 is automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method pipe system figure of the present invention.
Fig. 3 is a 4# testboard bay water cycle synoptic diagram of the present invention.
Among the figure: 1-constant temperature water tank, 2-backwater water storage box, 3-stirrer, the 4-water cooling system, 5-water injection allocator, 6-surface cooler, the 7-refrigeration air-conditioner, 8-first electric heater, 9-second electric heater, 10-level pressure expansion drum, 11-water trap, 12-water collector, the 13-1-4-water circulating pump, 13-3-first water circulating pump, 13-2-1-first centrifugal water pump, 13-2-2-second centrifugal water pump, 13-4-first water pump, 13-5 second water pump, 13-6-the 3rd water pump, 14-1,14-2,14-3, the 14-4-ball valve, 15,15-1-4,15-2-4,15-3-4,15-4-4,15-5,15-6-1,15-6-2,15-7,15-9,15-10,15-11, the 15-13-solenoid valve, 16-4, the 16-12-flow control valve, 17-1, the 17-2-filtrator, the 18-blowing device, the total irradiation table of 19-4,20-4-scattering irradiation table, 21-4-turbo flow meter, 22-armoured thermal resistance, the 23-electro connecting pressure gauge, 24-glass plate liquid level gauge, 25-solar thermal collector, 26-hot water storage tank, the 27-insulation, the 28-flexible pipe.
Embodiment
Automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method of the present invention comprises the equipment room of Stall, equipment room is equipped with constant temperature water tank 1, backwater water storage box 2, water cooling system 4, the first electric heaters 8, second electric heater 9, level pressure expansion drum 10, water collector 12, and water pump, valve, equipment such as instrument.The 4th buildings are provided with control, signals collecting machine room, comprise electrical control cabinet, power distribution cabinet and data collecting instrument.Roof is provided with six test station, and each test station comprises a testboard bay, and each testboard bay is provided with water injection allocator 5, water trap 11, blowing device 18, equipment such as measurement instrument.By water heating system first electric heater 8, tap water in 4 pairs of constant temperature water tanks 1 of second electric heater 9 and water cooling system heats respectively, after reaching the water temperature of setting value ± 0.2 ℃ after the cooling, deliver to the water trap 11 of roof by the first water pump 13-4 after, being assigned to 5 pairs of solar water heaters of water injection allocator on the testboard bay by water trap 11 again carries out various pipeline modes and connects and test, hot water after the test flows into backwater water storage box 2 by the water collector 12 of equipment room, send constant temperature water tank 1 back to by the 3rd water pump 13-6 again, or flow directly into constant temperature water tank 1, thereby realized the constant temperature test loop of test water without backwater water storage box 2.
Constant temperature water tank 1 is the water tank of six cubic metres of volumes, upper, middle and lower portion water temperature in the stirrer 3 even water tanks is installed at its casing top, also be provided with an overflow vent 29 and exhausr port 30 simultaneously, an armoured thermal resistance 22 is respectively installed by casing sidepiece upper, middle and lower portion, armoured thermal resistance 22 along box body wall be separated by each other 120 the degree angles make the water temperature of measurement accurate comprehensively, the casing sidepiece also is equipped with water level in a glass plate liquid level gauge 24 observation casees, dress tap water water inlet at the bottom of the case, constant temperature water tank 1 is incubated with insulation material 27 with the pipeline that adopts the PPI material, satisfies the adiabatic requirement of device; Water cooling system 4 constitutes refrigeration to constant temperature water tank water by surface cooler 6 and refrigeration air-conditioner 7, the second centrifugal water pump 13-2-2 makes constant temperature water tank water return constant temperature water tank 1 through solenoid valve 15-6-2 through surface cooler 6 to carry out air-cooled refrigeration cycle, the first centrifugal water pump 13-2-1 makes constant temperature water tank water return constant temperature water tank 1 through solenoid valve 15-6-1 through refrigeration air-conditioner 7 to carry out the cold-producing medium refrigeration cycle, control by electrical control cabinet, surface cooler 6 and refrigeration air-conditioner 7 can be opened refrigeration simultaneously, also but separate refrigeration is main according to water temperature superelevation degree and energy saving purposes were considered opening ways at that time; Main heat cycles by the second water pump 13-5 with constant temperature water tank water through ball valve 14-4,14-3, solenoid valve 15-9 delivers to electric heater 8 heating after solenoid valve 15-10, get back to constant temperature water tank 1 behind the flow control valve 16-12 and carry out main heat cycles, can improve fast more than the water temperature to 60 ℃ to satisfy every test request water temperature; Inferior heat cycles is delivered to constant temperature water tank water by the first water circulating pump 13-3 and is got back to constant temperature water tank 1 after electric heater 9 heating and carry out time heat cycles, and water temperature is carried out micro-heat regulation control, satisfies the accuracy requirement of constant temperature water tank coolant-temperature gage; Second electric heater 9, first electric heater 8 are realized by commercially available electric heater, boilers heated electrically respectively; By above heating or refrigeration cycle process, thereby constant temperature water tank 1 outlet water temperature can be remained in the scope of setting value ± 0.2 ℃, by the first water pump 13-4 constant temperature water tank water is passed through ball valve 14-1, filtrator 17-1, solenoid valve 15-7 delivers to water trap 11, be assigned to water injection allocator 5 on the solar water heater testboard bay of roof through water trap 11 again, realize of the various connections of test pipeline by the water injection allocator on the testboard bay 5 with solar water heater, and measuring-signal is delivered to the collection machine room in the 4th buildings by the armoured thermal resistance 22 that solar water heater import and export to be installed, monitor by data collecting instrument, the temperature variation of observation test water is carried out the drainage test.
The backwater water storage box 2 that this test macro water piping system is provided with a volume in the backwater circulation use device be six cubic meters, backwater water storage box 2 does not need adiabatic heat-insulation, after treating that the solar water heater test is finished, water cycle in the backwater water storage box 2 to be charged into constant temperature water tank 1, so that carry out the work that next step prepares thermostatted water, tank top is provided with an overflow vent 29 and exhausr port 30, can realize the safety relief effect, the water tank sidewall is equipped with glass plate liquid level gauge 24 observed stages, water tank bottom dress tap water water inlet; Solar water heater test water flows to backwater water storage box 2 through water collector 12, solenoid valve 15-5, and backwater water storage box water is squeezed into constant temperature water tank 1 through the 3rd water pump 13-6, solenoid valve 15-11 and realized that backwater circulation utilizes again; Also can be from the water outlet of water collector 12 through solenoid valve 15-13 according to the direct constant temperature water tank 1 that refluxes of difference in height.
Roof is provided with six solar water heater test station; the present invention mixes water drainage automatic constant temperature testing system and can test six solar water heaters simultaneously; each test station comprises a testboard bay; solar water heater is placed on the testboard bay; the hot water storage tank 26 of solar water heater is imported and exported and is parallel with an identical water injection allocator 5 on each testboard bay; can be implemented in warm; the water system cyclic process; the difference of test macro and testing apparatus is connected in the water system discharging experimentation; guarantee carrying out smoothly of various water cycles; connecting pipe between the hot water storage tank 26 of water injection allocator 5 and solar water heater is flexibly connecting of flexible pipe 28; the inlet and outlet connectors that each water injection allocator 5 connects solar water heater respectively is provided with 28 1 of flexible pipes; flexible pipe 28 all will be carried out adiabatic heat-insulation protection, prevents because environment and solar irradiation disturb the performance decline that causes.
Be installed in No. 4 water injection allocators 5 on the testboard bay by water circulating pump 13-1-4, solenoid valve 15-1-4 forms series arm one, solenoid valve 15-2-4,15-3-4,15-4-4 forms series arm two, the hot water storage tank 26 of solar water heater is imported and exported and is used the branch road one of flexible pipe 28 with water injection allocator 5 respectively, one end parallel connection of branch road two, the solenoid valve 15-2-4 of branch road two, connect with water collector 12 inlets by drainpipe by threeway between the 15-3-4, solenoid valve 15-3-4, connect with water trap 11 outlets by water inlet pipe by threeway between the 15-4-4, by closing solenoid valve 15-2-4,15-4-4, open solenoid valve 15-1-4, start water pump 13-1-4, can realize mixed water law test process solar water heater;
Testboard bay is to be used for fixing the basic support that solar water heating system is installed, requirement is applicable to the requirement of present domestic solar water heating system instruction for mounting, guarantee that domestic solar water heater can be tested at present on test board, certainly, testboard bay also is provided with water injection allocator 5 and blowing device 18, blowing device 18 comprises air curtain machine and support, blowing device 18 is equipped with in each preceding bottom of solar water heater testboard bay, blowing device 18 can guarantee to produce uniform head-on wind on solar thermal collector 25 surfaces, for the support in the blowing device 18, except that can the support air air curtain, can also regulate air curtain machine air outlet angle, make air outlet can realize air-supply from level to vertical different angles.To be that total system is unique be placed on outdoor part to employed testboard bay during test, direction should be towards Due South, any blocking the direct projection solar radiation can not be arranged, relevant environment and buildings such as high building, chimney, trees etc. simultaneously can not have any reflective or influence of blocking to test macro.
This test macro electric control system is made up of market universal signal switch board and control cabinet for power distribution, can be various electrical equipment, provide power supply as electric heater, water pump, valve, data acquisition etc., also different electrical equipments and parts are in time operated and controlled simultaneously, to satisfy when the different testing procedure the difference action of various electrical equipments, electric control system is also taken into account the work of system identification test signal and signals collecting at the same time.
The data acquisition system (DAS) of this test macro is made up of a commercially available data collecting instrument, can be provided with many or choose different module combinations and finish data acquisition according to signal what and kind different, the temperature of record experiment, flow, numerical value such as wind speed and irradiation, test signal is by " blackbox model " method, show through data collecting instrument, analysis and measuring and calculating draw the thermal performance test result of solar water heater, described " blackbox model " method is not done any hypothesis and restriction to the system type of test, the system that therefore this method goes for testing any kind comprises forced circulation, the circulation of thermogravimetric power, with fluorine Lyons is the system and the thermal-arrest of medium, the accumulation of heat integrated system.
Claims (8)
1, a kind of automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method, comprise water piping system, electric control system and data-signal acquisition analysis system three parts are formed, described water piping system comprises the ball valve (14-1) that is connected with constant temperature water tank (1), filtrator (17-1), solenoid valve (15-7), first water pump (13-4), water trap (11), flow control valve (16-4), turbo flow meter (21-4), water injection allocator (5), water collector (12), and connect successively with the pipeline of insulation material (27) insulation, it is characterized in that: described water piping system also comprises automatic constant-temperature water device, backwater circulation use device and voltage stabilizing safety feature;
Described automatic constant-temperature water device comprises constant temperature water tank (1), stirrer (3), water cooling system (4), first electric heater (8), described stirrer (3) is arranged on constant temperature water tank (1) top, and described water cooling system (4) comprises surface cooler (6) and refrigeration air-conditioner (7); First centrifugal water pump (13-2-1) and refrigeration air-conditioner (7) form the refrigeration cycle to constant temperature water tank water refrigeration, second centrifugal water pump (13-2-2) and surface cooler (6) form another refrigeration cycle to constant temperature water tank water refrigeration, and the heating that first electric heater (8) and second water pump (13-5) form the heating of constant temperature water tank water follows also loop;
Described backwater circulation use device comprises backwater water storage box (2); After solar water heater tested, hot water in the solar water heater flows into backwater water storage box (2) behind water collector (12) interflow, or flowing directly into constant temperature water tank (1) through solenoid valve (15-13), backwater water storage box water is sent into constant temperature water tank (1) by the 3rd water pump (13-6) through solenoid valve (15-11);
Described voltage stabilizing safety feature is at least two bypasses of outlet setting of described water collector (12), article one, connect level pressure expansion drum (10) through filtrator (17-2) back, be connected to ball valve (14-2) behind another process electro connecting pressure gauge (23) and the solenoid valve (15).
2, a kind of automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method according to claim 1, it is characterized in that: described automatic constant-temperature water device also comprises second electric heater (9) and first water circulating pump (13-3), forms the inferior heat cycles loop to the heating of constant temperature water tank water.
3, a kind of automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method according to claim 1 and 2 is characterized in that: be provided with a cover blowing device (18) at least at the testboard bay place of each solar water heater to be measured.
4, a kind of automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method according to claim 3, it is characterized in that: described blowing device (18) comprises air curtain machine, support, the air curtain machine is fixed on the support, and support is fixed on the testboard bay of solar water heater.
5, a kind of automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method according to claim 4, it is characterized in that: the installation site of described blowing device (18) comprises the front lower place of testboard bay, adopts the metal or the non-metal frame of scalable blowing device blowing angle to support.
6, a kind of automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method according to claim 5 is characterized in that: described blowing device (18) comprises the level blowing at 180 degree angles to the blowing angle of solar thermal collector (25).
7, a kind of automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method according to claim 1 and 2 is characterized in that: through water trap (11) and water collector (12) six test station can be set simultaneously between the outlet of described automatic constant-temperature water device and the inlet of backwater circulation use device.
8, a kind of automatic constant temperature testing system for solar water heater by water-mixing and water-discharging method according to claim 1 and 2, it is characterized in that: when temperature sensor (22) arrives the duct length of solar water heater inlet less than 0.1m, and when the temperature variation of water meets less than 0.01K in the pipeline, this segment pipe insulation material (27) selects for use polyurethane 100mm thick, or rubber and plastic 200mm is thick.
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