SU569748A1 - Testing installation for inspection of thermal power characteristics of low capacity pressurized refrigerating compressors - Google Patents

Description

rum connected in series through a liquid line through a heat exchanger with an additional ectrocalorimetry unit connected to the circuit parallel to the main electrocalorimeter. A steam superheater can be used as an additional water condenser. The drawing shows the layout of the DPA benchmark for determining the heat and power characteristics of the sealed low-pressure heat exchangers 1: workmanship,., Descriptions of the test bench contains test experience. " The compressor Ij is water condensers 2 and 3 for the stepwise condensation of a non-azeotropic mixture, the mea- sure of which is ustan & foam liquid. bone separator 4. To obtain a chill effect, electrocalorimeters 5 and 6 are provided, operating at different boiling points. An electric meter; an alorimeter 5 after the liquid line is connected via a heat exchanger 7 with a water co-detector 3, and an electrocalorimeter 6 taka) is sequentially connected via a liquid line through a heat exchanger 8 with a liquid: t: m separator 4. An electromotor 5 cm is included in the core ) - separator 9, For water preparation, before supplying water to water condensers 2, 3 and heat exchange 8, installed before regulating valves 10, 11, thermostats 12-15 are provided in the circuit. On heat exchangers 8, 7, fine-tuning valves 16, 17 are installed. To support the constant pressure head in front of the water condensers 2, 3, tanks ISj 19 are installed, performed as a vessel for level holders. Between the tanks 18, 19 and the water condensers 2, -3 there are respectively valves Tolokoy adjustments 2,0,21, the flow rate of water is determined by the flowmeters 22, 23, In addition, in the scheme of drying and measuring the flow rate of the refrigerant after the liquid separator 4, respectively installed & The filter drier | 24 and the flow meter 25; Before the water condenser 2, the electro calorimeter 5 and after the liquid separator 4, valves 26, 27 and 28 are taken for sampling the non-azeotropic mixture, respectively. For visual observation, for monitoring temperature and pressure measurements, the stand is equipped with viewing glasses 29-32, thermometer sleeves: 333 .6 and manometers 37-42. All circuit elements with water pipelines with shut-off valves 43-53, for isaltai keazeotropic mixture containing difficult-to-condensable component B scheme provides a version with condensation by a superheater 54, connected after the liquid separator 4, for temperature control of chamber 55, in which compressor i is placed , pre-flow rivers cooling unit 56. The stand operation according to the scheme with separation of fractions of non-azeotropic mixtures of refrigerants in the liquid separator 4 proceeds as follows. A pair of non-azeotropic mixture of refrigerants by compressor 1, located in a thermostatically controlled chamber 55, is injected into the internal condenser 2. The preparation of cooling water of the required parameters is carried out in the thermostat 15. Water from it is flowed. pump and pressure i tank 18, c. which keeps the aperture constant by sweeping the ode when it overflows o6pai BUT B 1D thermostat. The flow of water regulates with a fine adjustment valve 2O and is measured with a rotameter 22. A mixture of condensate and vapor with a higher concentration in the low-boiling component flows down and the liquid separator 4, which | 1 is also a sinker dp liquid-free | rich in high boiling coconut juice. This fraction from the liquid separator 4 through the valve 45, thermometer sleeve 33, filter dehydrated 24, flow rate Miep 25 of the refrigeration unit, heat exchanger 8, which is used to maintain the temperature of the refrigerant before dropping it ,. Thermometer sleeve 34, sight glass 29, control valve 10, where throttling occurs, enters the coil | 6 electrocalorimeter (high-temperature evaporator) with a secondary refrigerant, and a boil due to a secondary refrigerant. holo / shlny agent evaporated by heat supplied by an electric heater. The required vapor superheat temperature at the outlet of electrocalorimeter 6 is maintained by a heater. Through the valve 48, the viewing glass 30 through the suction pipeline, the vapors enter the compressor 1 for suction. The higher concentration pairs in the low-boiling component from the upper part of the liquid separator 4 are directed through the valve 43 to the water condenser 3. The condensate formed in the water condenser 3, for which the cooling water is prepared and supplied the same about & time as to the water condenser 2, with the aid of the thermostat 14, the pressure tank 19, the fine adjustment valve 21, the rotameter 23 is directed through the valve 47, warm exchanger 7, thermometer sleeve 35,

sight glass 30 regulating the power 11, valve 53 in the coil of the low-temperature electro-calorimeter 5, where due to the heat of condensation of the secondary refrigerant evaporated by

heat supplied by the electric heater. The resulting vapors are passed through a thermometer glen 36, the sight glass 31 and, mixing with the vapors coming from the electrocalorimeter 6, are sent to

test subject 1

When the stand operates according to this scheme, the valves 44, 46, 49, 50, 51 and 52 are closed. The stand scheme at the respective positions of the shut-off valves also allows defining heat-and-power characteristic ticks of hermetic cold compressors of small capacity with the following additional options for connecting the devices:

and with the included second water capacitor 3, made in the form of an aerial mountain heater, 54f

6 | About one water condenser 2 and two series-connected electrocalorimeters 6 and 5;

in with one water condenser 2 and liquid separator 9 switched on

Ay in two consecutively connected glorocolorimetry biv.

Claims (1)

Formula A stead for determining the heat and power characteristics of hermetic low-capacity refrigeration compressors containing a closed circulation loop with a water condenser, an electrocalorimeter and a control valve, in which the test compressor is included, characterized in that the target [Obi] characteristics of the non-azeotropic mixtures x, a liquid separator is included in the circuit of the condenser; its vapor reservoir is connected to an additional water condenser, sequentially connected by a liquid 1 inn through a heat exchanger p with an additional electro calormer connected to the carpet in parallel to the main electrical,; al rmmeter ,, SOURCE of the information, taken in on-line at the expert examination: 1, Copyright wedding-№ 453534,. F 25 B 1/00, 1973. 2 ,, Copyright certificate Mg 459637, class, F 25 1/00, 1973. four