Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Mixed working medium for organic working medium rankine cycle system of screw expander

A technology of screw expander and mixed working medium, which is applied in the field of heat pump circulating working medium and refrigeration, which can solve the problems of high risk, flammability and explosion, etc., and achieve improved heat transfer, high cycle heat utilization rate and excellent cycle performance Effect

Inactive Publication Date: 2011-07-20
TIANJIN UNIV
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although alkanes have good cycle thermal performance, they are extremely flammable and explosive, and have high risks, which limits their further promotion and use.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Mixed working medium for organic working medium rankine cycle system of screw expander
  • Mixed working medium for organic working medium rankine cycle system of screw expander
  • Mixed working medium for organic working medium rankine cycle system of screw expander

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] The preparation method of the above-mentioned mixed working medium is to physically mix the component substances according to the set mass ratio at normal temperature.

[0040] Specific examples are as follows:

example 1

[0042] Take 82.5% HCFC-123 and 17.5% HFC-152a, mix them physically at room temperature and use them as circulating working fluid.

example 2

[0044] 65.5% HCFC-123 and 34.5% HFC-245fa are used as circulating working fluid after physical mixing at room temperature.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a mixed working medium for an organic working medium rankine cycle system of a screw expander. The mixed working medium consists of two or three of four organic working media, namely HCFC(hydrochlorofluorocarbon)-123 (2,2-dichloro-1,1,1-trifluoroethane), HFC(hydro-fluoro-carbon)-245fa (1,1,1,3,3-pentafluoropropane), HFC-152a (1,1-difluoroethane) and HFC-134a (1,1,1,2-tetrafluoroethane). The sum of mass percentage of components of each mixed working medium is 100 percent. The preparation method for the mixed working medium comprises the following step of: physically mixing the components in the set mass ratio at normal temperature. The mixed working medium meets environmental protection requirement, namely has the ozone depletion potential (ODP) of zero, low global warming potential (GWP), suitable thermal parameters, good cycle performance and high cycle heat utilization rate.

Description

technical field [0001] The invention relates to a refrigeration and heat pump cycle working medium. In particular, it relates to a mixed working medium used in an organic working medium Rankine cycle system of a screw expander with an evaporation temperature of 60-130°C. Background technique [0002] Nowadays, the issue of energy saving and emission reduction has attracted more and more attention from all walks of life, and various energy-saving new technologies and equipment have emerged continuously. However, low-temperature waste heat power generation technology is not yet mature enough, because for low-temperature ) waste heat heat source, cannot use conventional power generation technology to generate electricity. The organic working fluid circulation screw expander system just makes up for this deficiency. This system can be used for low-temperature waste heat recovery, which can generate electricity or be used as a driving force to drive pumps and fans. In addition...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K5/04
Inventor 李惟毅谈西锋
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com