CN113006894A - Regenerative gravitational field acting device and method - Google Patents
Regenerative gravitational field acting device and method Download PDFInfo
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- CN113006894A CN113006894A CN202110283213.XA CN202110283213A CN113006894A CN 113006894 A CN113006894 A CN 113006894A CN 202110283213 A CN202110283213 A CN 202110283213A CN 113006894 A CN113006894 A CN 113006894A
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Abstract
The invention discloses a regenerative gravitational field work device and a corresponding method, and the regenerative gravitational field work device comprises a high-level condenser (1) arranged at a high level, a low-level liquid turbine (3) and a low-level heater (4) arranged at a low level, and a regenerative device arranged between the high level and the low level; the outlet of the condensing channel of the high-level condenser (1) is connected with the inlet of the heating channel of the heat recovery device, the outlet of the heating channel of the heat recovery device is connected with the inlet of the low-level liquid turbine (3), the outlet of the low-level liquid turbine (3) is connected with the inlet of the heating channel of the low-level heater (4), and the outlet of the heating channel of the low-level heater (4) is connected with the inlet of the condensing channel of the heat recovery device, so that a closed-loop system is formed. The invention arranges the heat recovery device between the triangular power cycle high-position device and the low-position device, so that the whole device has smaller system height difference and higher or equivalent thermal efficiency.
Description
Technical Field
The invention relates to the technical field of energy power, in particular to a regenerative gravitational field work doing device and a regenerative gravitational field work doing method.
Background
A large amount of low-grade heat sources with the temperature of less than 100 ℃ exist in the natural world and the industrial field and can be used for generating electric energy through a thermal power conversion device, and technical measures commonly used in the low-grade thermoelectric conversion field mainly comprise organic working medium Rankine cycle, kalina cycle and triangular cycle at present. The triangular cycle is particularly suitable for the heat conversion of low-grade heat sources below 100 ℃ because the refrigerant and the heat source have good heat transfer matching degree. The key equipment of the triangular circulation is a two-phase expansion machine, but the technical development of the current two-phase expansion machine is not mature, the isentropic efficiency is low, and the application of the triangular circulation technology is greatly restricted.
The patent with the patent number 'ZL201711419509.X' provides a gravity field acting heat pipe, a closed circulation pipeline is arranged in a gravity field, density difference is generated between refrigerating working media flowing in an ascending pipe/a descending pipe of the closed circulation pipeline by utilizing heating and condensation effects, a natural circulation pressure head is formed, one part of the pressure head is used for overcoming irreversible pressure loss in pipeline flowing, and the other part of the pressure head outputs work outwards through a hydraulic turbine, so that the use requirement on a two-phase expansion machine is avoided, and the traditional expansion energy release of the working media is converted into hydraulic energy release of the working media. The hydraulic turbine can adopt a cheap pump as a turbine device, and high isentropic efficiency is realized. However, this system has a problem that the requirement for installation height is large, limiting its applicable range.
For this reason, there is a need for improvements in the apparatus which allow for a reduction in the height requirements of the system for installation, while having the opportunity to achieve comparable or greater thermal efficiencies.
Disclosure of Invention
The invention aims to provide a regenerative gravity field acting device and a regenerative gravity field acting method, which are used for realizing equivalent or more efficient triangular power cycle process while the installation height is reduced.
In order to solve the above technical problem, the present invention provides a regenerative gravitational field work device, including: the high-level condenser is arranged at a high level, the low-level liquid turbine and the low-level heater are arranged at a low level, and the heat recovery device is arranged between the high level and the low level; the interior of the high-level condenser, the interior of the low-level heater and the interior of the heat regenerative device respectively comprise a condensing channel and a heating channel;
the outlet of the condensing channel of the high-order condenser is connected with the inlet of the heating channel of the heat regenerative device, the outlet of the heating channel of the heat regenerative device is connected with the inlet of the low-order liquid turbine, the outlet of the low-order liquid turbine is connected with the inlet of the heating channel of the low-order heater, the outlet of the heating channel of the low-order heater is connected with the inlet of the condensing channel of the heat regenerative device, and the outlet of the condensing channel of the heat regenerative device is connected with the inlet of the condensing channel of the high-order condenser, so that a closed-loop system is formed.
The invention relates to an improvement of a regenerative gravitational field acting device, which comprises the following steps:
the heat regenerator device comprises at least one heat regenerator, the heat regenerators are arranged up and down and have height difference, and each heat regenerator comprises a condensing channel and a heating channel;
the heating channels of the heat regenerator are sequentially connected in series, and the condensing channels of the heat regenerator are sequentially connected in series.
The invention relates to an improvement of a regenerative gravitational field acting device, which comprises the following steps:
the heat recovery device comprises a casing pipe heat recovery device, and the casing pipe heat recovery device comprises a condensing channel and a heating channel which are vertically arranged and sleeved inside and outside.
The invention is further improved as a regenerative gravitational field acting device:
the heating channel of the high-level condenser is connected with an external low-grade cold source, and the low-level heater is connected with an external low-grade heat source; the temperature of the external low-grade heat source is higher than that of the external low-grade cold source by more than 10 ℃, and the height difference between the high level and the low level is determined according to the temperature difference between the external low-grade cold source and the external low-grade heat source;
the refrigerant liquid flowing in the closed loop system is R22 and R134A refrigerant working media.
The invention also provides a method for doing work by utilizing the regenerative gravitational field work doing device, which comprises the following steps:
1.1) flowing out of the high-level condenser, and flowing into a heating channel inlet of a heat recovery device in an adiabatic manner, wherein the pressure intensity gradually increases along with the reduction of the height in a gravity field, and becomes low-temperature high-pressure refrigerant liquid when reaching the heating channel inlet of the heat recovery device;
1.2), low temperature high pressure refrigerant liquid gets into backheating device's heating channel after, absorb the condensation latent heat of refrigerant release in backheating device's the condensation channel, the temperature increases, becomes medium temperature high pressure refrigerant liquid, specifically does:
1.2.1), if the heat recovery device comprises at least one heat recovery device, the low-temperature high-pressure refrigerant liquid passes through the heating channels of each heat recovery device in sequence to become medium-temperature high-pressure refrigerant liquid;
1.2.2), if the heat recovery device comprises a sleeve pipe heat recovery device, after low-temperature high-pressure refrigerant liquid enters a heating channel of the sleeve pipe heat recovery device, the temperature is increased after latent heat of condensation released by the refrigerant in a condensation channel of the sleeve pipe heat recovery device is absorbed, and meanwhile, the pressure is further increased along with the reduction of the height of the refrigerant in the sleeve pipe heat recovery device, and the refrigerant liquid becomes the medium-temperature high-pressure refrigerant liquid at the outlet of the heating channel of the sleeve pipe heat recovery device;
1.3) the medium-temperature high-pressure refrigerant liquid flowing out of the heat recovery device flows to the inlet of the low-level liquid turbine, the pressure intensity is further increased along with the reduction of the height in the gravitational field, and the medium-temperature high-pressure refrigerant liquid is formed when the medium-temperature high-pressure refrigerant liquid reaches the inlet of the low-level liquid turbine;
1.4), the medium-temperature high-pressure refrigerant liquid enters a low-level liquid turbine, and after the pressure energy of the liquid is released, the pressure is reduced to the pressure of a low-level heater to become medium-temperature medium-pressure refrigerant liquid;
the medium-temperature and medium-pressure refrigerant liquid flowing out of the low-level liquid turbine flows into a heating channel of the low-level heater, and after the heat provided by an external low-grade heat source is absorbed, the temperature is increased to become a high-temperature and medium-pressure saturated or low-dryness refrigerant;
1.5) allowing the refrigerant with high temperature and medium pressure saturation or low dryness to flow to a condensing channel of the heat recovery device, gradually reducing the pressure intensity along with the increase of the high temperature in the gravity field, increasing the dryness of the refrigerant due to the flash evaporation effect of the refrigerant caused by the reduction of the pressure intensity, reducing the temperature, and forming the intermediate temperature refrigerant with certain dryness when reaching an inlet of the condensing channel of the heat recovery device;
1.6) the medium temperature refrigerant entering the condensing channel of the heat recovery device releases latent heat of condensation to the refrigerant in the heating channel of the heat recovery device, becomes medium temperature refrigerant, then comes out from the outlet of the condensing channel of the heat recovery device, and flows to the high-level condenser, specifically;
1.6.1), if the heat recovery device comprises at least one heat recovery device, the medium temperature refrigerant entering the heat recovery device is reduced in dryness and unchanged in temperature after sequentially passing through the condensing channels of the heat recovery devices, and becomes the medium temperature refrigerant with lower dryness;
1.6.2), if the heat recovery device comprises a sleeve pipe heat recovery device, the medium temperature refrigerant entering the condensing channel of the sleeve pipe heat recovery device releases the latent heat of condensation to the refrigerant in the heating channel of the sleeve pipe heat recovery device, meanwhile, the pressure is further reduced and the temperature is reduced along with the increase of the temperature of the refrigerant in the sleeve pipe heat recovery device, and the dryness change of the refrigerant in the condensing channel of the sleeve pipe heat recovery device is not large due to the combined action of the pressure reduction flash evaporation and the condensation heat release, so that the medium temperature refrigerant with lower temperature is formed;
1.7) in the process that the medium-temperature refrigerant coming out of the outlet of the condensing channel of the heat recovery device flows to the high-level condenser, the pressure intensity is further gradually reduced along with the increase of the high temperature in the gravity field, the dryness of the refrigerant is further increased and the temperature is further reduced due to the flash evaporation effect of the refrigerant caused by the reduction of the pressure intensity, and the refrigerant becomes a low-temperature low-pressure refrigerant with certain dryness when reaching the inlet of the condensing channel of the high-level condenser;
1.8), the low-temperature low-pressure refrigerant with certain dryness entering the condensation channel of the high-level condenser releases the latent heat of condensation to an external cold source, becomes saturated or low-temperature low-pressure refrigerant liquid with certain supercooling degree, then flows out from the condensation channel outlet of the high-level condenser, and the cycle is carried out.
The gravity field work method of the present invention is specifically the 3 methods described in examples 1 to 3 below.
The invention has the following technical advantages:
the invention arranges the heat recovery device between the triangular power cycle high-position device and the low-position device, so that the whole device has smaller system height difference and higher or equivalent thermal efficiency.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic view of an embodiment 1 of a regenerative gravitational field work device;
fig. 2 is a schematic diagram of an embodiment 2 of a regenerative gravitational field work device;
fig. 3 is a schematic diagram of a regenerative gravitational field work device in an embodiment 3.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto:
the high-order condenser 1, the low-order heater 4 and the heat regenerator 2 respectively comprise a condensing channel and a heating channel which are mutually attached together, and the liquids flowing through the condensing channel and the heating channel can exchange heat with each other;
the high-level condenser 1 is placed at a high level, the low-level liquid turbine 3 and the low-level heater 4 are placed at a low level, the heat regenerator 2 is placed at a certain height position between the high level and the low level, a heating channel of the high-level condenser 1 is communicated with an external low-grade cold source (such as outdoor air), refrigerant liquid in a condensing channel of the high-level condenser 1 discharges heat to the external low-grade cold source in the heating channel of the high-level condenser 1, the condensing channel of the low-level heater 4 is communicated with the external low-grade heat source, and the refrigerant liquid in the heating channel of the low-level heater 4 absorbs heat from the external low-grade heat source; the temperature of the external low-grade heat source is higher than that of the external low-grade cold source by more than 10 ℃, and the height difference between the high level and the low level is determined according to the temperature difference of the cold source and the heat source.
The outlet of the condensing channel of the high-level condenser 1 is connected with the inlet of the heating channel of the heat regenerator 2, the outlet of the heating channel of the heat regenerator 2 is connected with the inlet of the low-level liquid turbine 3, the outlet of the low-level liquid turbine 3 is connected with the inlet of the heating channel of the low-level heater 4, the outlet of the heating channel of the low-level heater 4 is connected with the inlet of the condensing channel of the heat regenerator 2, the outlet of the condensing channel of the heat regenerator 2 is connected with the inlet of the condensing channel of the high-level condenser 1, so that a closed-loop system is formed, and all the connections are in sealing connection;
the refrigerant liquid flowing in the closed loop system is a common refrigerant, such as R22, R134A and the like.
The method for applying work by using the regenerative gravitational field provided in embodiment 1 includes the following steps:
1.1, the low-temperature low-pressure refrigerant liquid flowing out of the high-level condenser 1 flows towards the heating channel inlet of the heat regenerator 2 in an adiabatic manner, the pressure intensity gradually increases along with the reduction of the height in the gravity field, and the low-temperature low-pressure refrigerant liquid becomes low-temperature high-pressure refrigerant liquid when reaching the heating channel inlet of the heat regenerator 2;
1.2, after the low-temperature high-pressure refrigerant liquid enters a heating channel of the heat regenerator 2 and absorbs latent heat of condensation released by the refrigerant in a condensation channel of the heat regenerator 2, the temperature is increased to become medium-temperature high-pressure refrigerant liquid, and then the medium-temperature high-pressure refrigerant liquid flows out from an outlet of the heating channel of the heat regenerator 2;
1.3, the medium-temperature high-pressure refrigerant liquid flowing out of the heat regenerator 2 flows to the inlet of the low-level liquid turbine 3, the pressure intensity is further increased along with the reduction of the height in the gravitational field, and the medium-temperature high-pressure refrigerant liquid becomes the medium-temperature high-pressure refrigerant liquid when reaching the inlet of the low-level liquid turbine 3;
1.4, the medium-temperature high-pressure refrigerant liquid enters a low-level liquid turbine 3, and after the pressure energy of the liquid is released, the pressure is reduced to the pressure of a low-level heater 4 to become medium-temperature medium-pressure refrigerant liquid;
the medium-temperature and medium-pressure refrigerant liquid flowing out of the low-level liquid turbine 3 flows into a heating channel of the low-level heater 4, absorbs heat provided by an external low-grade heat source, and then the temperature is increased to become a high-temperature and medium-pressure saturated (or low-dryness) refrigerant;
1.5, the high-temperature medium-pressure saturated (or low-dryness) refrigerant flows to a condensation channel of the heat regenerator 2, the pressure intensity is gradually reduced along with the increase of the high temperature in the gravity field, the flash evaporation effect of the refrigerant caused by the reduction of the pressure intensity enables the dryness of the refrigerant to be increased, the temperature is reduced, and the refrigerant becomes a medium-temperature refrigerant with certain dryness when reaching an inlet of the condensation channel of the heat regenerator 2;
1.6, after the medium-temperature refrigerant entering the condensing channel of the heat regenerator 2 releases latent heat of condensation to the refrigerant in the heating channel of the heat regenerator 2, the dryness is reduced, the temperature is unchanged, the medium-temperature refrigerant with lower dryness is formed, and then the medium-temperature refrigerant flows out from the outlet of the condensing channel of the heat regenerator 2 to the high-level condenser 1;
1.7, in the process that the medium-temperature refrigerant with lower dryness flows to the high-level condenser 1, the pressure intensity is further gradually reduced along with the increase of the height in the gravity field, the dryness of the refrigerant is further increased and the temperature is further reduced due to the flash evaporation effect generated by the reduction of the pressure intensity of the refrigerant, and the refrigerant becomes a low-temperature low-pressure refrigerant with certain dryness when reaching the inlet of a condensation channel of the high-level condenser 1;
1.8, after the low-temperature low-pressure refrigerant with certain dryness entering the condensation channel of the high-level condenser 1 releases the latent heat of condensation to an external cold source, the low-temperature low-pressure refrigerant becomes saturated low-temperature low-pressure refrigerant liquid with certain supercooling degree, and then the low-temperature low-pressure refrigerant liquid flows out from the condensation channel outlet of the high-level condenser 1, and the circulation is carried out.
the high-level condenser 1 is placed at a high level, the low-level liquid turbine 3 and the low-level heater 4 are placed at a low level, and the secondary heat regenerator 5 and the primary heat regenerator 6 are placed between the high level and the low level, wherein the secondary heat regenerator 5 is higher than the primary heat regenerator 6 in height; the two-stage heat regenerator 5 and the one-stage heat regenerator 6 both comprise a condensing channel and a heating channel which are mutually attached together, and the liquids flowing through the condensing channel and the heating channel can exchange heat with each other; the heating channel of the secondary heat regenerator 5 and the heating channel of the primary heat regenerator 6 are mutually connected in series, and the condensing channel of the secondary heat regenerator 5 and the condensing channel of the primary heat regenerator 6 are mutually connected in series;
the exit linkage of the condensing channel of high level condenser 1 secondary heat regenerator 5 heats the import of the passageway, the exit linkage of the heating passageway of secondary heat regenerator 5 primary heat regenerator 6 heats the import of the passageway, the export of the heating passageway of primary heat regenerator 6 is connected with the import of low level liquid turbine 3, the exit linkage of low level liquid turbine 3 heats the import of the passageway of low level heater 4, the export of the heating passageway of low level heater 4 is connected with the import of the condensing channel of primary heat regenerator 6, the export of the condensing channel of primary heat regenerator 6 is connected with the import of the condensing channel of secondary heat regenerator 5, the export of the condensing channel of secondary heat regenerator 5 is connected with the import of the condensing channel of high level condenser 1, thereby form closed loop system, above-mentioned all connections are sealing connection.
The regenerative gravitational field work method provided in embodiment 2 includes the following steps:
2.1, the low-temperature low-pressure refrigerant liquid flowing out of the high-level condenser 1 flows towards the heating channel inlet of the secondary heat regenerator 5 in an adiabatic manner, the pressure intensity gradually increases along with the reduction of the height in the gravity field, and the low-temperature low-pressure refrigerant liquid becomes low-temperature high-pressure refrigerant liquid when reaching the heating channel inlet of the secondary heat regenerator 5.
2.2, after the low-temperature high-pressure refrigerant liquid enters a heating channel of the secondary heat regenerator 5 and absorbs the latent heat of condensation released by the refrigerant in a condensation channel of the secondary heat regenerator 5, the temperature is increased to become medium-temperature high-pressure refrigerant liquid;
2.3, the medium-temperature high-pressure refrigerant liquid flowing out of the secondary heat regenerator 5 flows towards the heating channel inlet of the primary heat regenerator 6 in an adiabatic manner, the pressure is further gradually increased along with the reduction of the height in the gravitational field, and the medium-temperature high-pressure refrigerant liquid is formed when the medium-temperature high-pressure refrigerant liquid reaches the heating channel inlet of the primary heat regenerator 6;
after the medium-temperature high-pressure refrigerant liquid enters the heating channel of the primary heat regenerator 6 and absorbs the latent heat of condensation released by the refrigerant in the condensation channel of the primary heat regenerator 6, the temperature is increased to become medium-temperature high-pressure refrigerant liquid;
the medium-temperature high-pressure refrigerant liquid flowing out of the primary heat regenerator 6 flows to the inlet of the low-level liquid turbine 3, the pressure is further increased along with the reduction of the height in the gravitational field, and the medium-temperature high-pressure refrigerant liquid becomes the medium-temperature high-pressure refrigerant liquid when reaching the inlet of the low-level liquid turbine 3;
2.4, same as 1.4;
2.5, the high-temperature medium-pressure saturated (or low-dryness) refrigerant flows to a condensation channel of the primary heat regenerator 6, the pressure intensity is gradually reduced along with the increase of the high temperature in the gravitational field, the flash evaporation effect of the refrigerant caused by the reduction of the pressure intensity enables the dryness of the refrigerant to be increased, the temperature of the refrigerant is reduced, and the refrigerant becomes a medium-temperature refrigerant with certain dryness when reaching an inlet of the condensation channel of the primary heat regenerator 6;
2.6, after the medium-temperature refrigerant entering the condensing channel of the first-stage heat regenerator 6 releases latent heat of condensation to the refrigerant in the heating channel of the first-stage heat regenerator 6, the dryness is reduced, the temperature is unchanged, the medium-temperature refrigerant with lower dryness is formed, and then the medium-temperature refrigerant flows out from the outlet of the condensing channel of the first-stage heat regenerator 6;
2.7, the medium temperature refrigerant with lower dryness flowing out of the primary heat regenerator 6 flows to the inlet of the condensing channel of the secondary heat regenerator 5, the pressure intensity is further gradually reduced along with the increase of the high degree in the gravitational field, the refrigerant is increased in dryness due to the flash evaporation effect generated by the reduction of the pressure intensity, the temperature is reduced, and the medium temperature refrigerant with certain dryness is formed when the medium temperature refrigerant reaches the inlet of the condensing channel of the secondary heat regenerator 5;
after the medium-temperature refrigerant entering the condensing channel of the secondary heat regenerator 6 releases latent heat of condensation to the refrigerant in the heating channel of the secondary heat regenerator 6, the dryness is reduced, the temperature is unchanged, the medium-temperature refrigerant with lower dryness is formed, and then the medium-temperature refrigerant flows out from the outlet of the condensing channel of the secondary heat regenerator 6;
the middle-temperature refrigerant with lower dryness flowing out of the condensation channel of the secondary heat regenerator 6 flows to the condensation channel inlet of the high-level condenser 1, the pressure intensity is gradually reduced along with the increase of the height of the refrigerant, the dryness of the refrigerant is increased and the temperature is reduced due to the flash evaporation effect of the refrigerant caused by the reduction of the pressure intensity, and the refrigerant becomes the low-temperature low-pressure refrigerant with certain dryness when reaching the condensation channel inlet of the high-level condenser 1;
2.8, same as 1.8.
Example 3:
a regenerative gravitational field work-doing device, as shown in fig. 3, the regenerative device includes a double-pipe regenerator 7, that is, the regenerator 2 in embodiment 1 is replaced by the double-pipe regenerator 7, and the rest of the structure is the same as that in embodiment 1;
the high-level condenser 1 is placed at a high level, the low-level liquid turbine 3 and the low-level heater 4 are placed at a low level, the sleeve pipe heat regenerator 7 occupies a certain section position between the high level and the low level, the inside of the sleeve pipe heat regenerator 7 comprises a vertically arranged linear or spiral pipeline, and the pipeline comprises a condensing channel and a heating channel which are sleeved inside and outside, so that the inlet and the outlet of the condensing channel and the inlet and the outlet of the heating channel of the sleeve pipe heat regenerator 7 have certain height difference; the exit linkage of the condensing channel of high-order condenser 1 the import of the heating channel of sleeve pipe regenerator 7, the exit of the heating channel of sleeve pipe regenerator 7 and the access connection of low level liquid turbine 3, the exit linkage of low level liquid turbine 3 the import of the heating channel of low level heater 4, the export of the heating channel of low level heater 4 and the import of the condensing channel of sleeve pipe regenerator 7 are connected, the exit of the condensing channel of sleeve pipe regenerator 7 is connected with the condensing channel entry of high-order condenser 1, thereby form closed loop system, all above-mentioned connections are sealing connection.
The regenerative gravitational field work method provided in embodiment 3 includes the following steps:
3.1, the low-temperature low-pressure refrigerant liquid flowing out of the high-level condenser 1 flows towards the heating channel inlet of the sleeve pipe heat regenerator 7 in an adiabatic manner, the pressure intensity gradually increases along with the reduction of the height in the gravity field, and the low-temperature low-pressure refrigerant liquid becomes low-temperature high-pressure refrigerant liquid when reaching the heating channel inlet of the sleeve pipe heat regenerator 7.
3.2, after the low-temperature high-pressure refrigerant liquid enters the heating channel of the sleeve pipe heat regenerator 7 and absorbs the latent heat of condensation released by the refrigerant in the condensation channel of the sleeve pipe heat regenerator 7, the temperature is increased, meanwhile, the pressure is further increased along with the reduction of the height of the refrigerant in the sleeve pipe heat regenerator 7, and finally, the low-temperature high-pressure refrigerant liquid becomes the medium-temperature high-pressure refrigerant liquid at the outlet of the heating channel of the sleeve pipe heat regenerator 7;
3.3, the medium-temperature high-pressure refrigerant liquid flowing out of the sleeve pipe heat regenerator 7 flows to the inlet of the low-level liquid turbine 3, the pressure is further increased along with the reduction of the height in the gravitational field, and the medium-temperature high-pressure refrigerant liquid becomes the medium-temperature high-pressure refrigerant liquid when reaching the inlet of the low-level liquid turbine 3;
3.4, same as 1.4;
3.5, the high-temperature medium-pressure saturated (or low-dryness) refrigerant flows to a condensation channel of the casing pipe heat regenerator 7, the pressure intensity is gradually reduced along with the increase of the high temperature in the gravitational field, the flash evaporation effect of the refrigerant caused by the reduction of the pressure intensity enables the dryness of the refrigerant to be increased, the temperature is reduced, and the refrigerant becomes a medium-temperature refrigerant with certain dryness when reaching an inlet of the condensation channel of the casing pipe heat regenerator 7;
3.6, the medium-temperature refrigerant entering the condensing channel of the casing pipe heat regenerator 7 releases latent heat of condensation to the refrigerant in the heating channel of the casing pipe heat regenerator 7, meanwhile, the pressure is further reduced along with the increase of the refrigerant in the height of the casing pipe heat regenerator 7, the temperature is reduced, the dryness change of the refrigerant in the condensing channel of the casing pipe heat regenerator 7 is not large due to the combined action of pressure reduction flash evaporation and condensation heat release, the refrigerant becomes the refrigerant with lower temperature, and then the refrigerant flows out from the outlet of the condensing channel of the casing pipe heat regenerator 7;
3.7, flowing the refrigerant with lower temperature flowing out of the sleeve pipe heat regenerator 7 to an inlet of a condensation channel of the high-level condenser 1, gradually reducing the pressure intensity along with the increase of the height in the gravity field, increasing the dryness of the refrigerant due to the flash evaporation effect of the refrigerant caused by the reduction of the pressure intensity, further reducing the temperature, and forming the low-temperature low-pressure refrigerant with certain dryness when reaching the inlet of the condensation channel of the high-level condenser 1;
3.8, same as 1.8.
Experiment 1:
the calculation parameters and thermodynamic calculation results of the existing systems disclosed in examples 1, 2, 3 and zl201711419509.x are shown in table 1 (for 1kgR22), and the design conditions are as follows: the evaporation temperature is 60 ℃, the condensation temperature is 30 ℃, and the working medium is R22.
Table 1, example 2, example 3 and thermodynamic calculations results for existing systems (for 1kgR22)
The thermodynamic calculation result shows that:
1. the system height of the embodiment 1 is 265m, the installation height of the heat regenerator 2 is 147m, the system COP (defined as the ratio of output work to heating capacity) is 5.35%, compared with the existing system disclosed by the patent number ZL20171141951419509. X, the COP of the invention is improved by 9.2% under the same working condition, the system height is reduced by 14%, and the original purpose of the invention is effectively realized;
2. the system height of the embodiment 2 is 247m, the installation height of the primary heat regenerator 6 is 115m, the installation height of the secondary heat regenerator 5 is 182m, and the system COP is 5.53%, compared with the existing system and the embodiment 1, the COP of the embodiment 2 is further improved, and meanwhile, the installation height is further reduced, so that the original purpose of the invention is effectively realized;
3. the system height of example 3 is 281m, and the height interval occupied by the casing regenerator 7 is 147-235 m. Compared with the existing system, the implementation example 1 and the implementation example 2, the implementation example 3 has the advantages that the COP is further improved, the installation height is reduced by 8.8% compared with the existing system, the COP is improved by 17.3% compared with the existing system, and the original purpose of the invention is effectively realized.
In the above embodiments, the design parameters of the system can be reasonably determined by comprehensively considering factors such as specific use conditions and requirements, technical and economic performance, and the like, so as to take the applicability and the economic efficiency of the system into consideration.
Finally, it is also noted that the above-mentioned lists merely illustrate a few specific embodiments of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (5)
1. A backheating type gravity field acting device is connected with an external low-grade cold source and an external low-grade heat source, and is characterized by comprising: a high-level condenser (1) arranged at a high level, a low-level liquid turbine (3) and a low-level heater (4) arranged at a low level, and a heat recovery device arranged between the high level and the low level; the high-level condenser (1), the low-level heater (4) and the heat regenerator respectively comprise a condensing channel and a heating channel;
the outlet of the condensing channel of the high-level condenser (1) is connected with the inlet of the heating channel of the heat recovery device, the outlet of the heating channel of the heat recovery device is connected with the inlet of the low-level liquid turbine (3), the outlet of the low-level liquid turbine (3) is connected with the inlet of the heating channel of the low-level heater (4), the outlet of the heating channel of the low-level heater (4) is connected with the inlet of the condensing channel of the heat recovery device, and the outlet of the condensing channel of the heat recovery device is connected with the inlet of the condensing channel of the high-level condenser (1), so that a closed-loop system is formed.
2. The regenerative gravitational field work device according to claim 1, wherein:
the heat recovery device comprises at least one heat recovery device (2), the heat recovery devices (2) are arranged up and down and have height difference, and each heat recovery device (2) comprises a condensation channel and a heating channel;
the heating channels of the heat regenerator (2) are sequentially connected in series, and the condensing channels of the heat regenerator (2) are sequentially connected in series.
3. The regenerative gravitational field work device according to claim 1, wherein:
the heat recovery device comprises a casing pipe heat recovery device (7), wherein the casing pipe heat recovery device (7) comprises a condensing channel and a heating channel which are vertically arranged and are sleeved with each other.
4. The regenerative gravitational field work device according to claim 2 or 3, wherein:
the heating channel of the high-level condenser (1) is connected with an external low-grade cold source, and the low-level heater (4) is connected with an external low-grade heat source; the temperature of the external low-grade heat source is higher than that of the external low-grade cold source by more than 10 ℃, and the height difference between the high level and the low level is determined according to the temperature difference between the external low-grade cold source and the external low-grade heat source;
the refrigerant liquid flowing in the closed loop system is R22 and R134A refrigerant working media.
5. A method of gravitational field work using a gravitational field work apparatus as defined in any one of claims 1 to 4, comprising the steps of:
1.1) flowing out of the high-level condenser (1), and flowing into a heating channel inlet of a heat recovery device in an adiabatic manner, wherein the pressure intensity gradually increases along with the reduction of the height in a gravity field, and becomes low-temperature high-pressure refrigerant liquid when reaching the heating channel inlet of the heat recovery device;
1.2), low temperature high pressure refrigerant liquid gets into backheating device's heating channel after, absorb the condensation latent heat of refrigerant release in backheating device's the condensation channel, the temperature increases, becomes medium temperature high pressure refrigerant liquid, specifically does:
1.2.1), if the heat recovery device comprises at least one heat recovery device (2), the low-temperature high-pressure refrigerant liquid sequentially passes through the heating channels of the heat recovery devices (2) to become medium-temperature high-pressure refrigerant liquid;
1.2.2), if the heat recovery device comprises a sleeve pipe heat recovery device (7), after low-temperature high-pressure refrigerant liquid enters a heating channel of the sleeve pipe heat recovery device (7), the temperature is increased after the latent heat of condensation released by the refrigerant in a condensation channel of the sleeve pipe heat recovery device (7) is absorbed, and meanwhile, along with the reduction of the height of the refrigerant in the sleeve pipe heat recovery device (7), the pressure is further increased, and the refrigerant liquid becomes medium-temperature high-pressure refrigerant liquid at the outlet of the heating channel of the sleeve pipe heat recovery device (7);
1.3) the medium-temperature high-pressure refrigerant liquid flowing out of the heat recovery device flows to the inlet of the low-level liquid turbine (3), the pressure is further increased along with the reduction of the height in the gravitational field, and the medium-temperature high-pressure refrigerant liquid is formed when the medium-temperature high-pressure refrigerant liquid reaches the inlet of the low-level liquid turbine (3);
1.4), the medium-temperature high-pressure refrigerant liquid enters a low-level liquid turbine (3), and after the pressure energy of the liquid is released, the pressure is reduced to the pressure of a low-level heater (4) to become medium-temperature medium-pressure refrigerant liquid;
the medium-temperature and medium-pressure refrigerant liquid flowing out of the low-level liquid turbine (3) flows into a heating channel of the low-level heater (4), absorbs heat provided by an external low-grade heat source, and then the temperature is increased to become a refrigerant with high-temperature and medium-pressure saturation or low dryness;
1.5) allowing the refrigerant with high temperature and medium pressure saturation or low dryness to flow to a condensing channel of the heat recovery device, gradually reducing the pressure intensity along with the increase of the high temperature in the gravity field, increasing the dryness of the refrigerant due to the flash evaporation effect of the refrigerant caused by the reduction of the pressure intensity, reducing the temperature, and forming the intermediate temperature refrigerant with certain dryness when reaching an inlet of the condensing channel of the heat recovery device;
1.6) the medium temperature refrigerant entering the condensing channel of the heat recovery device releases latent heat of condensation to the refrigerant in the heating channel of the heat recovery device, becomes medium temperature refrigerant, then comes out from the outlet of the condensing channel of the heat recovery device, and flows to the high-level condenser (1), specifically;
1.6.1), if the heat recovery device comprises at least one heat recovery device (2), the medium temperature refrigerant entering the heat recovery device is reduced in dryness and unchanged in temperature after sequentially passing through the condensing channels of the heat recovery devices (2), and becomes the medium temperature refrigerant with lower dryness;
1.6.2), if the heat recovery device comprises a sleeve pipe heat recovery device (7), the medium-temperature refrigerant entering the condensing channel of the sleeve pipe heat recovery device (7) releases latent heat of condensation to the refrigerant in the heating channel of the sleeve pipe heat recovery device (7), meanwhile, the pressure is further reduced and the temperature is reduced along with the increase of the refrigerant in the height of the sleeve pipe heat recovery device (7), and the dryness change of the refrigerant in the condensing channel of the sleeve pipe heat recovery device (7) is not large due to the combined action of pressure reduction flash evaporation and condensation heat release, so that the medium-temperature refrigerant with lower temperature is formed;
1.7) in the process that the medium-temperature refrigerant coming out of the outlet of the condensing channel of the heat recovery device flows to the high-level condenser (1), the pressure intensity is further gradually reduced along with the increase of the height in the gravity field, the refrigerant is further increased in dryness and further reduced in temperature due to the flash evaporation effect generated by the reduction of the pressure intensity, and the refrigerant becomes a low-temperature low-pressure refrigerant with certain dryness when reaching the inlet of the condensing channel of the high-level condenser (1);
1.8), the low-temperature low-pressure refrigerant with certain dryness entering the condensation channel of the high-level condenser (1) releases the latent heat of condensation to an external cold source, becomes saturated or low-temperature low-pressure refrigerant liquid with certain supercooling degree, then flows out from the condensation channel outlet of the high-level condenser (1), and the cycle is carried out.
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