RU2154780C1 - Steam-ejector refrigerating machine - Google Patents

Abstract

FIELD: refrigerating engineering. SUBSTANCE: heat formed at combustion of fuel in steam generator furnace is conveyed to water which evaporates generating the steam. Steam from steam generator gets into ejector through steam superheater, sucking out cold steams from refrigerator, and then mixture of hot and cold steams passes through condenser into steam-water pump-heater. Mixture of hot and cold steams passing through condenser gets condensed owing to heat exchange with cooling system. Hot steam gets through regulating valve into steam-water pump- heater simultaneously with condensate. Intensive mixing of steam and water takes place in steam-water pump-heater with provision of heater condensate of high temperature and pressure, owing to which condensate is delivered into steam generator. Under action of vacuum, condensate, after condenser, in sucked, through throttling valve, into refrigerator where it is partially evaporated in vacuum. The rest of condensate is cooled. This part of condensate circulates along closed cold water circuit 15, passing through cold consumers 17. EFFECT: increased cooling capacity of machine owing to reduction of energy consumption and mass and dimensions of machine. 1 dwg

Description

 The invention relates to the field of refrigeration using steam ejector refrigerators and is intended for refrigeration and air conditioning of autonomous stationary and mobile objects.

 A known method of regenerative heating of feed water in a jet heater, which includes supplying steam to a turbogenerator, taking steam from a turbogenerator, taking it to a condenser, supplying condensate from a condenser and steam taken from a turbogenerator to a jet apparatus with steam condensation in the jet apparatus and heating, account of this condensate, with the subsequent supply of heated condensate to the diaerator and then to the steam boiler (RF Patent N 2115831. Bull. N 20 from 07.20.98).

 A device for a steam-water pump-heater (PNP), designed for use in various industrial technologies using steam, combining the functions of a heater and a pump at the same time. The use of PPS allows you to significantly reduce the energy consumption for your own needs and reduce the weight and size characteristics of heat exchangers (Petersburg Power Engineering / newspaper /, N 5 (11), dated May 25, 1999). However, previously the steam-water pump-heater was not used in refrigerators.

 There is a known scheme of a steam ejector chiller including a steam generator, an ejector, into which a working medium from a steam generator and a refrigerator enters, a refrigerator (evaporator), a condenser, from where a working medium enters the steam generator and a refrigerator, a feed pump, in front of the steam generator, and a throttle valve, in front of refrigerator, while the supply of high-temperature heat (heating) is carried out in a steam generator, and, the supply of low-temperature heat (cooling) in the refrigerator (Chechetkin AB, Zanemonets N.A. Heat engineering / Cheb. Chem to-tehn. universities. M .: Higher School, 1986, p. 105). However, a power supply is required to drive the feed pump, that is, the presence of a power grid or an autonomous source of electricity.

 The technical result that can be obtained by carrying out the invention is to increase the refrigeration coefficient of the steam ejector refrigeration machine by reducing energy consumption for own needs and reducing the overall dimensions of the machine.

 To achieve this technical result, a steam ejector chiller according to the Kirillov scheme (PEKHM K-1), which includes a steam generator, an ejector, into which the working medium comes from the steam generator and the refrigerator, a refrigerator, a condenser, from where the working medium enters the steam generator and the refrigerator, and a throttle a valve in front of the refrigerator, while the supply of high-temperature heat (heating) is carried out in the steam generator, and the supply of low-temperature heat (cooling) in the refrigerator is provided after the steam generator a heater through which the products of fuel combustion pass, a steam-water heater pump located between the condenser and the steam generator, and a steam supply line with a control valve connecting the section between the superheater and the ejector with the steam-water heater pump, and between the superheater, the steam generator, and the steam-water heating pump check valves are installed, while the condensate lines going from the condenser to the steam generator and the refrigerator are made separately, and through the lower part of the Odnilnik passes a closed loop of cold water circulation with a pump and a consumer of cold.

 Introduction to the steam ejector chiller according to the Kirillov scheme (PEKHM K-1), a superheater, a steam-water pump-heater, a steam supply line with a control valve connecting the section between the superheater and an ejector with a steam-water pump-heater, and a refrigerator through which the lower part passes a closed cold water circuit with a consumer of cold, allows you to get a new property, which consists in the possibility of using steam to replace the feed water pump and pre-heat condensation and in front of the steam generator.

 The drawing shows a steam ejector chiller according to the scheme of Kirillov (PEKHM K-1).

 The chiller includes a steam generator 1, in the furnace of which fuel is burned, a superheater 2 through which the products of fuel combustion pass, an ejector 3, a condenser 4 with a cooling system 5, a steam-water heater pump 6, a steam supply line 7 with a control valve 8, a section between the superheater 2 and the ejector 3 with a steam-water pump-heater 6. Between the superheater 2, the steam generator 1 and the steam-water pump-heater 6, check valves 9, 10 are installed, respectively. The ejector 3 is connected to the condenser 4, from the lower part of which there is a separate line 11 going to the steam generator 1 through the steam-water pump-heater 6, and line 12 going to the upper part of the refrigerator 13 through the throttle valve 14. The upper part of the refrigerator 13 is also connected to the ejector 3, and through the lower part refrigerator 13 passes a closed loop of cold water 15 with a pump 16 and a consumer of cold 17.

 Steam ejector chiller according to the scheme of Kirillov (PEKHM K-1) works as follows.

 The heat generated during the combustion of fuel in the furnace of the steam generator 1 is transferred to water, as a result of which it evaporates to form steam. Steam from the steam generator 1 enters the superheater 2, through which the products of combustion of fuel pass, where the steam overheats with increasing pressure. Then the superheated steam enters partially into the ejector 3, which causes the suction of cold steam from the refrigerator 13, and partially to the line 7. From the ejector 3, the mixture of hot and cold steam enters the condenser 4, where it condenses due to heat exchange with the cooling system 5. Then the condensate enters along two lines 11 and 12, respectively, to the steam-water pump-heater 8 and the refrigerator 13. Simultaneously with the condensate, hot steam enters the steam-water pump-heater 6 through line 7, through the control valve 8. In the steam-water pump-heater 8, due to of a special design and the effect of mixing two-phase vapor-liquid media, intensive mixing of steam and water occurs, followed by obtaining heated condensate with high temperature and pressure. Due to this pressure, the heated condensate is supplied to the steam generator 1. As a result of the vacuum formed in the upper part of the refrigerator 13 due to the suction of cold steam into the ejector 3, part of the condensate, after the condenser 4, is sucked into the refrigerator through the throttle valve 14 via line 12 13, where it partially evaporates in vacuum, and the rest of the condensate is cooled. This part of the condensate circulates in a closed cold water circuit 15, using the pump 16, passing through the consumer 17. To control the direction of steam movement between the superheater 2, the steam generator 1 and the steam-water heating pump 8, check valves 9 and 10 are installed.

Sources of information
1. RF patent N 2115831. Bull. N 20 from 07/20/98

 2. "Energy of St. Petersburg" (newspaper), N 5 (11), from 05.25.99

 3. Chechetkin A.B., Zanemonets N.A. Heat engineering / Textbook. for chemical engineering universities. M.: Higher School, 1986, p. 105. prototype.

Claims (1)

 A steam ejector chiller, including a steam generator, an ejector, into which the working medium comes from the steam generator and the refrigerator, a refrigerator, a condenser, from which the working medium enters the steam generator and the refrigerator, and a throttle valve in front of the refrigerator, while high-temperature heat is supplied (heating) to a steam generator, and the supply of low-temperature heat (cooling) is in the refrigerator, characterized in that it is equipped after the steam generator with a superheater through which the products pass fuel, a steam-water heater pump located between the condenser and the steam generator, and a steam supply line with a control valve connecting the section between the superheater and the ejector with the steam-water heater pump, and check valves are installed between the superheater, the steam generator and the steam-water heater pump, condensate lines going from the condensate to the steam generator and the refrigerator are made separately, and a closed cold circuit passes through the bottom of the refrigerator of boiled water with a pump and a consumer of cold.