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Low-parameter heat recovery system

A heat recovery, low-parameter technology, applied in heat recovery systems, energy-saving heating/cooling, steam engine installations, etc., can solve problems such as the inability to realize thermal cycle, and achieve the effect of saving costs, improving work efficiency, and saving energy

Pending Publication Date: 2019-05-17
潘彦伯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the key problems of the Rankine cycle are: 1. If the heat of vaporization of the exhaust steam is not absorbed, the exhaust steam cannot be turned into a liquid, and a continuous thermal cycle cannot be realized. This is the fundamental basis for the work of a heat engine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like figure 2 As shown, the low-parameter heat recovery system provided by this embodiment includes a first heat exchanger 1, a second heat exchanger 2, a steam turbine 3, a generator 4, a jet heat pump 5, a regenerator 6, a working medium pump 7 and a storage liquid tank8.

[0031] The liquid storage tank 8 is used to store the working medium liquid. Common working medium liquids include liquid nitrogen, liquid air, R410A refrigerant, liquid carbon dioxide, liquid hydrogen, liquid helium, etc. In this example, liquid nitrogen is preferably selected. The liquid nitrogen The temperature under normal pressure is -196°C, and 1 cubic meter of liquid nitrogen can be expanded to 696 cubic meters of pure gaseous nitrogen at 21°C. In the liquid state, a liquid discharge channel 81, a gas-liquid mixing channel 82, an exhaust channel 83, and a liquid inlet channel are arranged on it.

[0032] The working medium pump 7 adopts a cryogenic liquid pump, which is convenient for the...

Embodiment 2

[0047] This embodiment is basically the same as that of Embodiment 1, the auxiliary circulation system is not changed, only one heat exchanger and two valves are added on the main circulation system, specifically, as image 3 As shown, the first heat exchanger 1 is connected with a third heat exchanger 9, and a first valve 10 is connected in parallel to the first heat exchanger 1, and a second valve 11 is connected in parallel to the third heat exchanger 9. .

[0048] The external recovery of waste heat in this embodiment adopts the ambient heat source, and the main circulation system of this embodiment uses a two-stage heat exchanger to exchange heat between the liquid nitrogen and the ambient heat source, so that the ambient heat source cools down, the liquid nitrogen is heated into nitrogen gas, and the steam turbine 3 can be operated Drive the engine to generate electricity, and then the ambient heat source cools down and then blows it into the air through the fan to cool ...

Embodiment 3

[0050] This embodiment is basically the same as Embodiment 2, the auxiliary circulation system is not changed, only the same number of heat exchangers and valves are added to the main circulation system, and its connection structure is the same as that of the third heat exchanger 9 and the second valve 11, specifically like Figure 4 As shown, add N heat exchangers, N=1, 2, 3, ... n (n is an integer), the heat exchanger will take away the heat energy of the room, concentrate the heat energy and flow it into the steam turbine 3 to do work, and drive the generator 4 to generate electricity , Adjusting the opening of the valve, or the flow rate of the low-temperature working medium, can adjust the cooling capacity. The combined cooling and power generation system provided in this implementation case performs combined cooling and power generation for various buildings, residential areas, industrial areas, large enterprises, and urban complexes. Buildings, residential quarters, in...

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Abstract

The invention discloses a low-parameter heat recovery system which comprises a main circulation system for generating electricity or doing work and an auxiliary circulation system for acquiring and maintaining low-temperature energy, and low-temperature working medium fluid and external recovered waste heat form a temperature difference by controlling the main circulation system and the auxiliarycirculation system to achieve electricity generating and work doing; the main circulation system includes a liquid storage tank, a working medium pump, a regenerator, a first heat exchanger, a steam turbine and a generator which are connected in sequence; the auxiliary circulation system includes a second heat exchanger connected with the regenerator and further comprises a steam turbine, a liquidstorage tank, a jet heat pump and a regenerator which are connected in sequence, the second heat exchanger is also connected to the jet heat pump, and the regenerator is connected to the liquid storage tank; and both the first heat exchanger and the second heat exchanger are connected to external recovered waste heat. Compared with a conventional heat engine, the main circulation system is assisted by auxiliary circulation, and continuous and stable heat work conversion is changed under the condition that no external cold source is needed for cooling dead steam.

Description

technical field [0001] The invention belongs to the technical field of engineering thermodynamics, and relates to a low-parameter heat recovery system, in particular to a system for generating electricity or doing work by using waste heat, water temperature, air and other ambient temperatures. Background technique [0002] According to the second law of thermodynamics, among all cycles working between the same high-temperature heat source temperature and low-temperature heat source temperature, the thermal efficiency of the Carnot cycle is the highest, which is called Carnot's theorem. Carnot cycle is the most fundamental basis of thermodynamic heat engine cycle, the efficiency formula of Carnot cycle η=1-T 2 / T 1 , is the core of the Carnot cycle. From the efficiency formula of the Carnot cycle, it can be seen that the efficiency of the Carnot cycle is only related to the thermodynamic temperature of the two heat sources. If the temperature of the high-temperature heat sou...

Claims

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Application Information

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IPC IPC(8): F01K25/10F01K13/00F01K27/00F01D15/10
CPCY02B30/52
Inventor 潘彦伯
Owner 潘彦伯
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