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System for using LNG (Liquefied Natural Gas) in air conditioner

A technology of air conditioning and circulation system, which is applied in the field of cold energy utilization of liquefied natural gas (LNG for short), and can solve problems such as energy waste

Active Publication Date: 2012-11-14
四川空分设备(集团)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This part of the cooling capacity is usually discarded with seawater or air in the evaporator, resulting in a waste of energy

Method used

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  • System for using LNG (Liquefied Natural Gas) in air conditioner
  • System for using LNG (Liquefied Natural Gas) in air conditioner
  • System for using LNG (Liquefied Natural Gas) in air conditioner

Examples

Experimental program
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Effect test

Embodiment 1

[0023] like figure 1 As shown, the liquefied natural gas in the cryogenic storage tank 10 or from other sources is first pressurized by the first LNG pump 4, then passes through the first heat exchanger 1, the second heat exchanger 2 and the third heat exchanger 3 in sequence, and then enters the first heat exchanger. The second expansion generator 8 generates power, and the natural gas coming out of the second expansion generator 8 passes through the third heat exchanger 3 to further recover its heat and improve the utilization rate of the cooling capacity of the liquefied natural gas. The medium-temperature refrigerant vapor is condensed into a liquid by the low-temperature refrigerant and natural gas in the second heat exchanger 2, then pressurized by the medium-temperature refrigerant pump 6, and exchanges heat with the brine for air conditioning in the third heat exchanger 3, It is heated into steam, then enters the third expansion generator 9 to expand and generate power...

Embodiment 2

[0025] like figure 2 As shown, the liquefied natural gas in the cryogenic storage tank 10 or other sources directly enters the first heat exchanger 1, the second heat exchanger 2 and the third heat exchanger 3, and then directly enters the pipeline network for gas supply, canceling the first LNG Pump 4 and the second expansion generator 8, the medium-temperature refrigerant vapor is condensed into liquid by the low-temperature refrigerant and natural gas in the second heat exchanger 2, and then pressurized by the medium-temperature refrigerant pump 6 to enter the third heat exchanger 3 Exchange heat with the refrigerant used for air conditioning, be heated into steam, then enter the third expansion generator 9 to expand and generate power, and finally return to the second heat exchanger 2 to complete the closed cycle of medium-temperature refrigerant; low-temperature refrigerant steam In the first heat exchanger 1, the cooling capacity of liquefied natural gas is condensed in...

Embodiment 3

[0027] like image 3 As shown, the liquefied natural gas in the cryogenic storage tank 10 or from other sources is first pressurized by the first LNG pump 4, then passes through the first heat exchanger 1, the second heat exchanger 2 and the third heat exchanger 3 in sequence, and then enters the first heat exchanger. The second expansion generator 8 generates power, and the natural gas from the second expansion generator 8 passes through the second heat exchanger 2 and the third heat exchanger 3 to further recover its heat and improve the utilization rate of the cooling capacity of the liquefied natural gas. The medium-temperature refrigerant vapor is condensed into a liquid by the low-temperature refrigerant and natural gas in the second heat exchanger 2, then pressurized by the medium-temperature refrigerant pump 6, and exchanges heat with the brine for air conditioning in the third heat exchanger 3, It is heated into steam, then enters the third expansion generator 9 to ex...

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Abstract

The invention relates to cold energy utilization of liquefied natural gas (for short LNG) and air conditioner technology utilization, in particular to a system for using LNG to an air conditioner. The system comprises a closed type circulation system using a medium-temperature refrigerant as a working medium and a closed type circulation system using a low-temperature refrigerant as a working medium, the closed type circulation system using the medium-temperature refrigerant as the working medium comprises a second heat exchanger (2), a third heat exchanger (3), a medium-temperature refrigerant pump (6) and a third expansion power generator (9); and medium-temperature refrigerant steam is condensed into liquid in the second heat exchanger by the low-temperature refrigerant and the LNG, and then pressurized by the medium-temperature refrigerant pump (6). According to the system, cold energy of the LNG is used for air conditioner refrigeration, electric energy consumed by the air conditioner is saved, and the gasified LNG is used for pipeline network air supply, can also be used for additional power generation, and can generate more electric energy to be used for various kinds of electric equipment.

Description

technical field [0001] The invention relates to the utilization of cold energy of liquefied natural gas (LNG for short), and also relates to the utilization of air-conditioning technology, specifically a system for using LNG in air-conditioning. Background technique [0002] At present, the central air conditioners in large-scale office buildings, shopping malls, subways, airports and other places in China basically use refrigerators for cooling, converting electrical energy into cold energy for use. [0003] The traditional central air-conditioning system is generally composed of a refrigeration compressor system, a refrigerant (freezing and hot and cold) circulating water system, a cooling circulating water system, a coil fan system, and a cooling tower fan system. The refrigeration unit compresses the refrigerant (refrigerant medium such as R134a, R22, etc.) through the compressor and cools it into a liquid state and sends it to the evaporator. The refrigeration circulati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B27/00F24F13/30F01K25/10F17D1/02
Inventor 曹峻
Owner 四川空分设备(集团)有限责任公司
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