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A low-grade heat-driven elastothermic refrigeration cycle method and system thereof

A refrigeration cycle, low-grade heat technology, used in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as no help and large system driving force, avoid fluid leakage, simple system structure, and simplify system design. Effect

Active Publication Date: 2020-02-11
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although these two types of technical solutions help to solve the challenge of system temperature difference, they are not helpful to solve the challenge of large system driving force

Method used

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  • A low-grade heat-driven elastothermic refrigeration cycle method and system thereof
  • A low-grade heat-driven elastothermic refrigeration cycle method and system thereof
  • A low-grade heat-driven elastothermic refrigeration cycle method and system thereof

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Embodiment Construction

[0044] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0045] The present invention relates to shape memory alloys (referred to as memory alloys) that provide stress and strain characteristics when they change from martensite to austenite under thermal drive, and when memory alloys change from austenite to martensite phase under stress drive Variable exothermic properties. In the memory alloy, there are at least two crystal structures (phases), that is, a high temperature phase (austenite) and a low temperature phase (martensite) at zero stress.

[0046] figure 1 The fundamentals of the heat-driven elastothermic refrigeration cycle approach are described. In order to facilitate the understanding of the principle, Figure 2A , Figure 2B , Figure 2C The basic process of the cycle method is described more vividly through the cycle flow chart, Figure 3A , Figure 3B Provides a design scheme fo...

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Abstract

The invention discloses a heat-driven elastothermal refrigeration cycle method and its system. The system is driven by a high-temperature drive group memory alloy that is martensite at normal temperature and zero stress to absorb heat from a low-grade heat source and discharge heat to a heat sink at normal temperature. The low-temperature refrigeration group memory alloy which is austenite at normal temperature and zero stress refrigerates to the low-temperature refrigeration space.

Description

[0001] field of invention [0002] The invention relates to the application field of refrigeration and air conditioning, in particular to an elastothermal refrigeration cycle method and system driven by low-grade heat. Background technique [0003] Vapor compression cycle is currently the most widely used refrigeration technology in the world, and is widely used in air conditioners, refrigerators, and freezers. Since the beginning of the 20th century, the core components such as compressors and heat exchangers in the vapor compression cycle have undergone several generations of development. At present, the refrigeration efficiency of the best vapor compression refrigeration system has been close to 40-45% of the theoretical efficiency of the Carnot cycle. Vapor compression refrigeration systems use a large number of refrigerants such as HCFCs and HFCs, which are harmful to the environment and climate change. The greenhouse gas effects of these refrigerants are mostly CO 2 Mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B23/00F25B27/00F25B27/02F25B41/04F25B49/00F25B41/20
CPCF25B23/00F25B27/00F25B27/002F25B27/02F25B49/00F25B41/20Y02A30/274
Inventor 钱苏昕鱼剑琳晏刚
Owner XI AN JIAOTONG UNIV
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