Method and apparatus for power generation using waste heat

a technology of waste heat and power generation, applied in lighting and heating equipment, machines/engines, greenhouse gas reduction, etc., can solve the problems of changing the buoyancy characteristics of the vessel by consumption of liquid fuel, and achieve the reduction of the required size of the exhaust duct of the marine power plant, the reduction of the required size of the exhaust duct, and the increase of the exhaust gas density.

Inactive Publication Date: 2006-06-01
CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0012] Yet another advantage of the present invention results from the thermal energy removed from the exhaust gases of the marine vessel power plant. The mass flow of the exhaust is a function of the volumetric flow and density of the exhaust. The present method and apparatus enables the exhaust gases to be significantly cooled and consequently the density of the exhaust gases increased. As a result, the mass flow is substantially decreased, and the required size of the marine power plant exhaust duct is substantially less.

Problems solved by technology

In addition, consumption of liquid fuel changes the buoyancy characteristics of the vessel.

Method used

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  • Method and apparatus for power generation using waste heat
  • Method and apparatus for power generation using waste heat
  • Method and apparatus for power generation using waste heat

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Embodiment Construction

[0025] Referring to FIGS. 1-6, the present method for utilizing waste heat includes an organic Rankine cycle (ORC) device 20 for waste heat utilization. The ORC device 20 includes at least one of each of the following: 1) a turbine coupled with an electrical generator (together hereinafter referred to as the “turbo-generator 22”); 2) a condenser 24; 3) a refrigerant feed pump 26; 4) an evaporator 28; and 5) a control system. The ORC device 20 is preferably a closed “hermetic” system with no fluid makeup. In the event of leaks, either non-condensables are automatically purged from the device 20 or charge is manually replenished from refrigerant gas cylinders.

[0026] The ORC device 20 uses a commercially available refrigerant as the working medium. An example of an acceptable working medium is R-245fa (1,1,1,3,3, pentafluoropropane). R-245fa is a non-flammable, non-ozone depleting fluid. R-245fa has a saturation temperature near 300° F. and 300 PSIG that allows capture of waste heat o...

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Abstract

According to the present invention, a method and apparatus for generating power aboard a marine vessel is provided. The method comprises the steps of: (a) providing a Rankine Cycle device that includes at least one of each of an evaporator, a turbo-generator that includes a turbine coupled with an electrical generator, a condenser, and a refrigerant feed pump; (b) disposing the one or more evaporators within an exhaust duct of a power plant of the marine vessel; (c) operating the power plant; and (d) selectively pumping refrigerant through the Rankine Cycle device, wherein refrigerant exiting the evaporator powers the turbine, which in turn powers the generator to produce power.

Description

BACKGROUND OF THE INVENTION [0001] 1. Technical Field [0002] The present invention relates to methods and apparatus for power generation using waste heat from a power plant in general, and to those methods and apparatus that utilize an organic Rankine cycle in particular. [0003] 2. Background Information [0004] Marine and land based power plants can produce exhaust products in a temperature range of 350-1850° F. In most applications, the exhaust products are released to the environment and the thermal energy is lost. In some instances, however, the thermal energy is further utilized. For example, the thermal energy from the exhaust of an industrial gas turbine engine (IGT) has been used as the energy source to drive a Rankine cycle system. [0005] Rankine cycle systems can include a turbine coupled to an electrical generator, a condenser, a pump, and a vapor generator. The vapor generator is subjected to a heat source (e.g., geothermal energy source). The energy from the heat source ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01K23/06
CPCF01K15/00F01K25/10F22B1/1807F28B1/02Y02E20/16Y02E20/30F01K25/08F01K1/00F01K27/00F01K17/00
Inventor SUNDEL, TIMOTHY NEIL
Owner CARRIER CORP
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