CN205102453U - Solar energy doublestage ejector refrigeration system - Google Patents

Abstract

The utility model discloses a solar energy two-stage jet refrigeration system, aiming to provide a solar energy two-stage jet refrigeration system driven by solar energy, so as to increase the pressure ratio of the whole system, thereby reducing the evaporation temperature and increasing the condensation temperature . Including solar collector, first generator, second generator, first injector, second injector, condenser, evaporator, intercooler, four-way valve, first heating coil, second heating pan pipe, the first thermal expansion valve, the second thermal expansion valve and the cooling coil, the cooling coil is placed in the intercooler, the first heating coil is placed in the first generator, and the second heating coil is placed in the Inside the second generator; the operating temperature of the first generator is higher than the operating temperature of the second generator. The system can not only carry out the cycle of lower evaporation temperature and higher condensation temperature, but also can carry out cascade utilization of energy, the energy utilization efficiency of the whole system is high, and the energy saving effect is good.

Description

A Solar Dual-Stage Jet Refrigeration System

technical field

The utility model relates to a refrigerating cycle system, in particular to a solar energy double-stage jet refrigerating system.

Background technique

At present, energy shortage has become a major problem that the whole world must face and solve. Improving the efficiency of existing energy utilization, developing and utilizing renewable energy, and realizing sustainable development have become a theme of today's era. Solar energy utilization technology is now relatively mature, and the use of solar energy for air conditioning and refrigeration has also been widely used. Cascade utilization of solar energy is an important measure for energy conservation.

The traditional single-jet refrigeration system is simple, has few moving parts, compact structure, takes up little space, and has the advantages of using renewable energy such as solar energy, geothermal energy, and low-grade energy such as industrial waste heat to achieve refrigeration. The refrigeration temperature that can be obtained by the traditional injection refrigeration cycle is relatively high, usually above 0°C. Due to the limitation of the small compression ratio of the ejector, it is difficult to achieve a high condensation pressure and a low evaporation pressure at the same time, and the efficiency of the system is low. It is almost impossible to obtain a refrigeration temperature of -10°C through the evaporator, which limits the application of traditional jet refrigerators, and the use of low-temperature heat sources to provide high-temperature heat sources is also limited.

Utility model content

The purpose of this utility model is to aim at the technical defects existing in the prior art, and provide a solar energy two-stage jet refrigeration system driven by solar energy, so as to increase the pressure ratio of the whole system, thereby reducing the evaporation temperature and increasing the condensation temperature .

The technical scheme adopted for realizing the purpose of this utility model is:

A solar dual-stage jet refrigeration system is characterized in that it includes a solar heat collector, a first generator, a second generator, a first ejector, a second ejector, a condenser, an evaporator, an intercooler, Four-way valve, first heating coil, second heating coil, first thermal expansion valve, second thermal expansion valve and cooling coil, the cooling coil is placed in the intercooler, the first The heating coil is placed in the first generator, and the second heating coil is placed in the second generator; the refrigerant vapor outlet of the first generator is connected to the inlet of the first ejector The outlet of the first ejector is connected to the refrigerant inlet of the condenser, the refrigerant outlet of the condenser is connected to the first port of the four-way valve, and the second port of the four-way valve One path is connected to the inlet of the first generator through the first working fluid pump, the other path is connected to the inlet of the second generator through the second working fluid pump, and the third port of the four-way valve passes through the first A thermal expansion valve is connected to the inlet of the intercooler, the fourth port of the four-way valve is connected to the inlet of the cooling coil, and the outlet of the cooling coil is connected to the cooling coil through the second thermal expansion valve. The inlet of the evaporator is connected, the outlet of the evaporator is connected to the ejection pipe of the second ejector, the steam outlet of the intercooler is connected to the ejection pipe of the first ejector, and the outlet of the second ejector is connected to the ejection pipe of the first ejector. The outlet of the second generator is connected to the inlet of the second injector, the outlet of the second injector is connected to the connecting pipe below the liquid surface of the intercooler, and the heat medium outlet of the solar collector is connected to the second ejector. The heat medium inlet of a heating coil is connected, the heat medium outlet of the first heating coil is connected with the heat medium inlet of the second heating coil, and the heat medium outlet of the second heating coil passes through the heat medium pump It is connected with the inlet of the solar heat collector; the operating temperature of the first generator is higher than that of the second generator.

Compared with the prior art, the beneficial effects of the utility model are:

1. The steam generated by the second generator in the solar dual-stage jet refrigeration system of the present invention is used as the working fluid of the second jet to eject the steam from the evaporator, after pressurization and after passing through the first throttle valve The liquid and flash steam are mixed in the intercooler to generate steam. The steam generated by the first generator is used as the working fluid of the first ejector to guide the steam from the intercooler. After pressurization, it enters the condenser to condense, and a part of the condensed liquid After being supercooled by the intercooler, it enters the evaporator through the second throttle valve to absorb heat, and the steam pressure increases sequentially, which increases the pressure ratio of the entire system, thereby reducing the evaporation temperature and increasing the condensation temperature, and expanding the application of jet refrigerators. , expanding the application of using a low temperature heat source to provide a high temperature heat source.

2. In the refrigeration system of the present utility model, the first generator and the second generator heat the refrigerant through their built-in first heating coil and second heating coil respectively, and the first heating coil and the second heating coil The heat medium of the tube is provided by the solar collector, the heat medium outlet of the solar heat collector is connected with the heat medium inlet of the first heating coil, and the heat medium outlet of the first heating coil is connected with the second heating coil The heat medium inlet of the second heating coil is connected, and the heat medium outlet of the second heating coil is connected with the inlet of the solar collector through the heat medium pump, so that the heat medium passes through the first heating coil and the second heating coil to heat the refrigerant in sequence, realizing It improves the cascade utilization of low-grade energy and improves the energy utilization efficiency of the entire system.

3. The solar dual-stage jet refrigeration system of the present invention can not only carry out the cycle of lower evaporation temperature and higher condensation temperature, but also can carry out cascade utilization of energy, the energy utilization efficiency of the whole system is high, and the energy saving effect is good.

Description of drawings

Figure 1 is a schematic diagram of a solar dual-stage jet refrigeration system of the present invention.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

A schematic diagram of a solar dual-stage jet refrigeration system of the utility model is shown in Figure 1, including a solar heat collector 14, a first generator 15, a second generator 10, a first injector 2, and a second injector 1 , condenser 3, evaporator 9, intercooler 8, four-way valve 4, first heating coil 16, second heating coil 17, first thermal expansion valve 5, second thermal expansion valve 7 and cooling coil 6. The cooling coil 6 is placed in the intercooler 8, the first heating coil 16 is placed in the first generator 15, and the second heating coil 17 is placed in the first Inside the second generator 10 . The refrigerant vapor outlet of the first generator 15 is connected to the inlet of the first ejector 2, and the outlet of the first ejector 2 is connected to the refrigerant inlet of the condenser 3, and the condenser 3 The outlet of the refrigerant is connected to the first interface a of the four-way valve 4, the second interface b of the four-way valve is connected to the inlet of the first generator 15 through the first working medium pump 12, and the other The second working fluid pump 13 is connected to the inlet of the second generator 17, the third port c of the four-way valve 4 is connected to the inlet of the intercooler 8 through the first thermal expansion valve 5, The fourth port d of the four-way valve is connected to the inlet of the cooling coil 6, and the outlet of the cooling coil 6 is connected to the inlet of the evaporator 9 through the second thermal expansion valve 7. The outlet of the evaporator 9 is connected to the ejector pipe of the second injector 1, the steam outlet of the intercooler 8 is connected to the ejector pipe of the first ejector 2, and the outlet of the second generator 10 The outlet is connected to the inlet of the second injector 1 , and the outlet of the second injector 1 is connected to the connecting pipe below the liquid surface of the intercooler 8 . The heat medium outlet of the solar heat collector 14 is connected to the heat medium inlet of the first heating coil 16, and the heat medium outlet of the first heating coil 16 is connected to the heat medium of the second heating coil 17. The inlet is connected, and the outlet of the heat medium of the second heating coil 17 is connected with the inlet of the solar heat collector 14 through the heat medium pump 11 . The operating temperature of the first generator is higher than the operating temperature of the second generator.

The heat medium of the first heating coil 16 and the second heating coil 17 is provided by the solar heat collector 14, and the heat medium outlet of the solar heat collector 14 is connected with the heat medium inlet of the first heating coil 16, The heat medium outlet of the first heating coil 16 is connected to the heat medium inlet of the second heating coil 17, and the heat medium outlet of the second heating coil 17 passes through the heat medium pump 11 and the solar heat collector 14 The inlet is connected so that the heat medium heated by the solar heat collector 14 passes through the first heating coil 16 and the second heating coil 17 in sequence to heat the refrigerant to generate steam, thereby realizing cascaded utilization of energy.

The steam generated by the second generator 10 is used as the working fluid of the second ejector 1 to guide the steam from the evaporator 9, and after pressurization, the liquid and flash steam after passing through the first thermal expansion valve 5 are transferred to the intercooler 8 Internal mixing generates steam. The steam generated by the first generator 15 is used as the working fluid of the first ejector 2 to eject the steam from the intercooler 8. After pressurization, it enters the condenser 3 for condensation, and a part of the condensed liquid passes through the intercooler. After 8 is supercooled, it enters the evaporator 9 through the second thermal expansion valve 7 to absorb heat, and the steam pressure increases successively, which increases the pressure ratio of the entire system. This cycle repeats itself, and at the same time realizes a refrigeration cycle with a lower evaporation temperature and a higher condensation temperature.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these Improvement and retouching should also be regarded as the protection scope of the present utility model.

Claims (1)

1. A solar dual-stage jet refrigeration system, characterized in that it comprises a solar heat collector, a first generator, a second generator, a first ejector, a second ejector, a condenser, an evaporator, an intercooler device, four-way valve, first heating coil, second heating coil, first thermal expansion valve, second thermal expansion valve and cooling coil, the cooling coil is placed in the intercooler, the The first heating coil is placed in the first generator, and the second heating coil is placed in the second generator; the refrigerant vapor outlet of the first generator is connected with the first ejector The inlet of the first ejector is connected to the refrigerant inlet of the condenser, the refrigerant outlet of the condenser is connected to the first port of the four-way valve, and the first port of the four-way valve One of the two ports is connected to the inlet of the first generator through the first working fluid pump, and the other is connected to the inlet of the second generator through the second working fluid pump. The third port of the four-way valve is connected to the inlet of the second generator through the The first thermal expansion valve is connected to the inlet of the intercooler, the fourth port of the four-way valve is connected to the inlet of the cooling coil, and the outlet of the cooling coil passes through the second thermal expansion valve It is connected with the inlet of the evaporator, the outlet of the evaporator is connected with the injection nozzle of the second ejector, and the steam outlet of the intercooler is connected with the injection nozzle of the first ejector. The outlet of the second generator is connected to the inlet of the second injector, the outlet of the second injector is connected to the connecting pipe below the liquid surface of the intercooler, and the outlet of the heat medium of the solar collector is connected to the inlet of the second injector. The heat medium inlet of the first heating coil is connected, the heat medium outlet of the first heating coil is connected with the heat medium inlet of the second heating coil, and the heat medium outlet of the second heating coil passes through the heat The media pump is connected to the inlet of the solar heat collector; the operating temperature of the first generator is higher than that of the second generator.