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Injection type low-temperature waste-heat power generation refrigerating method

A low-temperature waste heat and refrigeration method technology, which is applied in the direction of refrigerators, refrigeration and liquefaction, lighting and heating equipment, etc., can solve problems such as complex operation and limited cooling capacity, achieve safe and reliable process, strengthen refrigeration effect, and improve overall energy The effect of utilization

Inactive Publication Date: 2008-06-11
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain deficiencies in this technology: first, in the refrigeration process, the working fluid does not undergo a phase change, and refrigeration is mainly achieved by the change of sensible heat of the working fluid, so the cooling capacity is limited to a certain extent; The carrier makes the system equipment structure and operation more complicated

Method used

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  • Injection type low-temperature waste-heat power generation refrigerating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Taking the working fluid R245fa as an example, the waste heat temperature is 150°C, the evaporation pressure of the waste heat exchanger is 1.26MPa, the turbine expansion ratio is 2.5, the turbine outlet pressure is 0.5MPa, the condensation temperature of the condenser is 25°C, the condensation pressure is 0.15MPa, and the evaporator evaporates The temperature is 12°C, the evaporation pressure of the evaporator is 0.09MPa, the ambient temperature is 25°C, and the cooling water temperature is 10°C as the working parameters to illustrate the cycle flow. The parameters involved in the specific implementation process do not limit the present invention.

[0025] 1. The saturated liquid organic working medium R245fa at about 25°C is raised to 1.26MPa by the working medium pump and sent to the waste heat exchanger for heating.

[0026] 2. The liquid working medium R245fa is heated to about 105°C by the low-temperature waste heat of about 150°C in the waste heat exchanger, the ...

Embodiment 2

[0034] Taking the working fluid R123 as an example, the waste heat temperature is 250℃, the evaporation pressure of the waste heat exchanger is 1.76MPa, the expansion ratio of the turbine is 2.5, the outlet pressure of the turbine is 0.7MPa, the condensation temperature of the condenser is 30℃, the condensation pressure is 0.11MPa, and the evaporator evaporates The temperature is 10°C, the evaporation pressure of the evaporator is 0.05MPa, the ambient temperature is 25°C, and the cooling water temperature is 20°C as the working parameters to illustrate the cycle flow. The parameters involved in the specific implementation process do not limit the present invention.

[0035] 1. The saturated liquid organic working medium R123 at about 30°C is raised to 1.76MPa by the working medium pump and sent to the waste heat exchanger for heating.

[0036] 2. The liquid working medium R123 is heated to saturation by the low-temperature waste heat of about 250°C in the waste heat exchanger,...

Embodiment 3

[0044] Taking the working fluid R141b as an example, the waste heat temperature is 350°C, the evaporation pressure of the waste heat exchanger is 2.94MPa, the turbine expansion ratio is 2.5, the turbine outlet pressure is 1.18MPa, the condensation temperature of the condenser is 35°C, the condensation pressure is 0.12MPa, and the evaporator evaporates The temperature is 7°C, the evaporation pressure of the evaporator is 0.04MPa, the ambient temperature is 25°C, and the cooling water temperature is 25°C as the working parameters to illustrate the cycle flow. The parameters involved in the specific implementation process do not limit the present invention.

[0045] 1. The saturated liquid organic working medium R141b at about 35°C is raised to 2.94MPa by the working medium pump and sent to the waste heat exchanger for heating.

[0046] 2. The liquid working medium R141b is heated to saturation by the low-temperature waste heat of about 350°C in the waste heat exchanger, with a t...

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Abstract

A jet low temperature exhaust heat generating refrigeration method in energy resource technical field is provided, which takes the solar energy, geothermal energy, biomass energy or low temperature exhaust heat within the scope between 150 to 350 DEG C. as the heat resource and the groundwater, lake water, river water or seawater as the cold resource and selects organics as working substances to form an enclosed circulating system. Liquid saturated organic working substances are sent into an exhaust heat exchanger after enhanced the temperature by a working substance pump and then are heated to saturation status or steam-gas status and further to push turbine to rotate and also drive a generating unit to output electric works. Turbine exhaust serving as the working flow can flow into an ejector; then inject the gas at outlet of an evaporator to the ejector; then the two are mixed with pressure expanded in the ejector and then enter into a condenser to be condensed into liquid. Part of the liquid working substance can reenter into the working substance pump to complete the generating circulation and the other part can go through the procedure as reducing pressure and temperature through a throttle valve and then return to the evaporator to complete the refrigeration circulation, so as to realize the generating and refrigeration by using lower temperature and exhaust heat.

Description

technical field [0001] The invention relates to a power generation and refrigeration method in the technical field of refrigeration engineering, in particular to a jet-type low-temperature waste heat power generation and refrigeration method. Background technique [0002] Statistics show that the total amount of low-temperature waste heat below 350 °C accounts for about 50% of the total industrial heat production. In practical applications, due to the lack of effective recycling methods, most of the low-temperature waste heat is directly discharged into the environment, which not only wastes a lot of energy, but also constitutes serious thermal pollution to the surrounding environment. Therefore, it has become a research hotspot in the field of energy technology to explore the method of rationally utilizing low-temperature waste heat. Organic Rankine cycle low-temperature waste heat power generation technology is an effective low-temperature waste heat recovery and utilizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B27/00F25B9/08
Inventor 翁一武郑彬罗琪蔡向明
Owner SHANGHAI JIAO TONG UNIV
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