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Overlapped gravity field work applying method and used device

A gravity field and cascading technology, which is applied in the direction of steam engine devices, combined engines, lighting and heating equipment, etc., can solve the problems of high position drop requirements and reduced practical feasibility, so as to achieve wide application range and reduce height difference , The effect of reducing the position drop

Active Publication Date: 2020-09-08
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this device has the disadvantage of requiring a relatively high position drop. For example, under the conventional evaporation and condensation temperature difference of tens of degrees, the required position drop reaches hundreds of meters, which reduces its practical feasibility.

Method used

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  • Overlapped gravity field work applying method and used device
  • Overlapped gravity field work applying method and used device
  • Overlapped gravity field work applying method and used device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1, the square circulation method of the cascading gravity field acting device, its mode of operation is as follows:

[0049] 1.1. In the gravitational field work subsystem of the same level:

[0050] The gas-liquid mixture with low dryness flowing out from the condensation heat release channel of the high-level condenser 1 flows adiabatically to the inlet of the low-level liquid turbine 2 under the joint action of gravity and pressure difference. As the height decreases in the gravitational field, the gravity The potential energy decreases, the pressure gradually increases, and the temperature rises; therefore, an ultra-high pressure liquid working fluid enters the low-level liquid turbine 2, and its liquid pressure can be released to do work externally, and at the same time the pressure is reduced to high pressure, becoming a high-pressure working medium; the high-pressure working medium continues to flow into the low-level evaporation The evaporating and he...

Embodiment 2

[0058] Embodiment 2, cascade type gravitational field acting device square, triangular circulation method, its mode of operation is as follows:

[0059] 2.1. In the gravitational field work subsystem of the first level (first level):

[0060] 1.1 with embodiment 1.

[0061] 2.2. In the gravitational field work subsystem of the same level except the first level:

[0062] The low-temperature and low-pressure saturated (or supercooled) liquid working medium flowing out from the condensation heat release channel of the high-level condenser 1 flows adiabatically to the inlet of the low-level liquid turbine 2 under the joint action of gravity and pressure difference. small, the gravitational potential energy decreases, the pressure gradually increases, and the temperature rises; therefore, an ultra-high-pressure liquid working fluid enters the low-level liquid turbine 2, releases its liquid pressure and can do work externally, and at the same time the pressure decreases to a high p...

Embodiment 3

[0068] Embodiment 3, the triangular cycle method of the cascading gravity field work device, its mode of operation is as follows:

[0069] 3.1. In the gravitational field work subsystem at the same level:

[0070] 2.2 with embodiment 2.

[0071] 3.2. In the interstage circulation system:

[0072] 1.2 with embodiment 1.

[0073] 3.3, same as 1.3 of embodiment 1.

[0074] The cycle state of the refrigerant at each stage in Embodiment 3 is represented as a triangular cycle feature on the T-S diagram.

[0075] Take the two-stage cycle as an example; the calculation parameters of embodiment 3 are shown in Table 2 (for 1kgR22). The design conditions are: the average temperature of the high-temperature heat source is 65°C, and the average temperature of the low-temperature heat source is 10°C. The difference between the high level and the low level is 164.2 meters. The evaporation temperature of the first-level low-level evaporator is 60°C, and the working fluid is R22. The ther...

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Abstract

The invention discloses an overlapped gravity field work applying device. The overlapped gravity field work applying device is at least composed of two stages of gravity field work applying subsystems; an interstage circulating system is arranged between the adjacent two stages of gravity field work applying subsystems, and each interstage circulating system comprises an interstage circulating pump (4); each stage of gravity field work applying subsystem comprises a high-level condenser (1), a low-level liquid turbine (2) and a low-level evaporator (3); and a heat absorption channel of the high-level condenser (1) of the previous stage of gravity field work applying subsystem, a heat releasing channel of the low-level evaporator (3) of the next stage of gravity field work applying subsystem and the interstage circulating pumps (4) are sequentially connected to form a closed cycle. The invention further provides an overlapped gravity field work applying method using the device. According to the overlapped gravity field work applying device, the position drop required by the system work is reduced, and the application range is wider; and through the overlapped circulation, the temperature difference of the evaporators and the condensers is enlarged under the condition of the certain position drop.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a cascading gravity field work device and method. Background technique [0002] The steam power method is currently the main method of the thermodynamic cycle method. The utilization efficiency of this method for low-grade heat sources is not high, especially when it is applied to the widely existing low-grade heat sources below 80°C, because the vapor pressure of the working fluid is relatively small , can not effectively use the vapor pressure energy to do work and generate electricity, even if the organic working fluid Rankine cycle is used, the efficiency is still low at low heat source temperature. Patent application (201711419509.X) proposes a gravitational field work heat pipe device, which uses the mutual conversion of pressure energy and gravitational potential energy in the gravitational field to realize the natural pressurization and decompression process in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K27/00F01K25/00F01K11/02F01D13/02F25B7/00
CPCF01K27/00F01K25/00F01K11/02F01D13/02F25B7/00
Inventor 李斌王厉骆菁菁
Owner ZHEJIANG SCI-TECH UNIV
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