Share

Geothermal ORC systems using large screw expanders.

Number: pap. 1470

Author(s) : BIEDERMAN T., BRASZ J. J.

Summary

This paper describes an air-cooled low-temperature Organic Rankine Cycle (ORC) Power Recovery system with a screw expander as its power unit. The screw expander is specifically designed for ORC expansion and has a unique rotor profile. Manufacturing the screw expanders at a plant which already produces screw compressor hardware has resulted in reduced development time and lower development cost. Low screw expander cost has been realized by assembling the screw expanders in parallel with the higher volume screw compressors. The net electrical output power of the system's ORC screw expander varies from 5kW to 950 kWel which is an order of magnitude larger than the output power of currently available ORC screw expanders. Following the development of a 300 kWel prototype unit and its installation and successful operation at Chena Hot Springs near Fairbanks, AK, four commercial production units were developed for geothermal power production at Lightning Dock in New Mexico. All units use R245fa as refrigerant. Initial operating experience with these ORC systems will be presented.

Available documents

Format PDF

Pages: 8 p.

Available

  • Public price

    20 €

  • Member price*

    15 €

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Geothermal ORC systems using large screw expanders.
  • Record ID : 30013919
  • Languages: English
  • Source: 2014 Purdue Conferences. 22nd International Compressor Engineering Conference at Purdue.
  • Publication date: 2014/07/14

Links


See other articles from the proceedings (138)
See the conference proceedings

Indexing