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Improved organic Rankine cycle system and method

A circulatory system, organic technology, applied in the field of organic Rankine cycle system, can solve the problems of lower overall efficiency, size increase, high temperature difference, etc.

Active Publication Date: 2015-08-05
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, intermediate fluid heat represents as much as about a quarter of the cost of the entire ORC
Additionally, intermediate fluid systems and heat exchangers require high temperature differentials, increasing size and reducing overall efficiency

Method used

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  • Improved organic Rankine cycle system and method
  • Improved organic Rankine cycle system and method
  • Improved organic Rankine cycle system and method

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Embodiment Construction

[0079] As discussed in detail below, embodiments of the present invention include an Organic Rankine Cycle (ORC) system and a method of limiting the temperature of a working fluid within the system below a threshold temperature. In one embodiment, the system and method provides a waste heat fluid that flows into various sections of the heat exchanger to enable optimal heat exchange between the waste heat fluid and the working fluid, thereby avoiding overheat. In another embodiment, the heat exchanger includes external strengthening features and internal strengthening features to provide optimal heat exchange between the waste heat fluid and the working fluid. It should be noted that these two embodiments can also be used in combination with each other. As used herein, the term "threshold temperature" refers to a temperature in the range between about 250 degrees Celsius to about 350 degrees Celsius.

[0080] Go to attached image, figure 1 is a schematic diagram of an Organ...

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Abstract

An ORC system (10) configured to limit temperature of a working fluid (14) below a threshold temperature is provided. The ORC system (10) includes a heat source (16) configured to provide waste heat fluid (18). The ORC system (10) also includes a heat exchanger (20) coupled to the heat source (16), wherein the heat exchanger (20) includes multiple external (82) or internal (84) enhancement features. The external (82) enhancement features are configured to reduce a first heat transfer coefficient between the working fluid (14) and the waste heat fluid (18) from the heat source (16), external to the heat exchanger (20). The internal (84) enhancement features are configured to increase a second heat transfer coefficient between the working fluid (14) and the waste heat fluid (18) from a heat source (16), internal to the heat exchanger (20).

Description

[0001] Cross References to Related Applications [0002] This application is related to the following co-pending U.S. Patent Application Serial No. {Attorney Docket No. 233702-1}, entitled "Organic Rankine Cycle System and Method," assigned to To the same assignee as and filed with this application; the entirety of which application is incorporated herein by reference. technical field [0003] The present invention relates generally to Organic Rankine Cycle (ORC) systems, and more particularly to economical systems and methods for ORC systems. Background technique [0004] With the onset of the energy crisis, and the need to conserve and use our available energy more efficiently, Rankine cycle systems have been used to capture so-called "waste heat" that would otherwise be lost to the atmosphere, and in doing so , "waste heat" indirectly damages the environment by requiring more fuel than necessary to generate power. [0005] Common (waste heat) sources of waste heat that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K23/10
CPCF01K25/08F01K23/10
Inventor M·A·勒哈S·W·弗罗伊恩德G·塞希
Owner GENERAL ELECTRIC CO
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