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CHARGING PUMP SYSTEM FOR SUPPLYING A WORKING FLUID TO BEARINGS IN A SUPERCRITICAL WORKING FLUID CIRCUIT

  • US 20160040557A1
  • Filed: 03/13/2014
  • Published: 02/11/2016
  • Est. Priority Date: 03/13/2013
  • Status: Abandoned Application
First Claim
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1. A heat engine system, comprising:

  • a working fluid circuit having a high pressure side and a low pressure side and being configured to flow a working fluid therethrough, wherein the working fluid comprises carbon dioxide and at least a portion of the working fluid is in a supercritical state;

    a heat exchanger fluidly coupled to and in thermal communication with the high pressure side of the working fluid circuit, configured to be fluidly coupled to and in thermal communication with a heat source, and configured to transfer thermal energy from the heat source to the working fluid within the high pressure side;

    an expander fluidly coupled to the working fluid circuit and disposed between the high pressure side and the low pressure side and configured to convert a pressure drop in the working fluid to mechanical energy;

    a driveshaft coupled to the expander and configured to drive a device with the mechanical energy;

    a system pump fluidly coupled to the working fluid circuit between the low pressure side and the high pressure side of the working fluid circuit and configured to circulate the working fluid through the working fluid circuit;

    a recuperator fluidly coupled to the working fluid circuit and operative to transfer thermal energy between the high pressure side and the low pressure side of the working fluid circuit;

    a cooler in thermal communication with the working fluid in the low pressure side of the working fluid circuit and configured to remove thermal energy from the working fluid in the low pressure side of the working fluid circuit; and

    a mass management system fluidly coupled to the working fluid circuit and comprising;

    a mass control tank fluidly coupled to the low pressure side of the working fluid circuit and configured to receive the working fluid from the working fluid circuit; and

    a charging pump fluidly coupled to the mass control tank and configured to transfer the working fluid from the mass control tank to;

    the low pressure side of the working fluid circuit by an inventory supply line; and

    a bearing housing substantially encompassing bearings contained within a system component.

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