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1. (WO2017041147) ORC FOR TRANSFORMING WASTE HEAT FROM A HEAT SOURCE INTO MECHANICAL ENERGY AND COOLING SYSTEM MAKING USE OF SUCH AN ORC

Pub. No.:    WO/2017/041147    International Application No.:    PCT/BE2016/000040
Publication Date: Fri Mar 17 00:59:59 CET 2017 International Filing Date: Fri Aug 19 01:59:59 CEST 2016
IPC: F01K 25/08
F01K 21/00
F01K 11/00
F01K 25/04
Applicants: ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAP
Inventors: ÖHMAN, Henrik
Title: ORC FOR TRANSFORMING WASTE HEAT FROM A HEAT SOURCE INTO MECHANICAL ENERGY AND COOLING SYSTEM MAKING USE OF SUCH AN ORC
Abstract:
ORC (Organic Rankine Cycle) for transforming heat from a heat source (11) into mechanical energy, the ORC (8) comprising a closed circuit (14) containing a two-phase working fluid, the circuit (14) comprising a liquid pump (15) for circulating the working fluid in the circuit (14) consecutively through an evaporator (10) which is configured to be placed in thermal contact with said heat source (11); through an expander (12) for transforming the thermal energy of the working fluid into mechanical energy; and through a condenser (16) which is in thermal contact with a cooling element (17), characterized, in that the expander (12) is situated above the evaporator (10) and in that the fluid outlet (22) of the evaporator (10) is connected to the fluid inlet (23) of the expander (12) by means of a so called raiser column (24) which is filled with a mixture of liquid working fluid and of gaseous bubbles of the working fluid, which mixture is supplied to the expander (12), and in that the raiser column (24) extends with at least a part at the same level or above the level of the inlet (23) of the expander (12) in such a way that a gravitational flow is possible of the liquid working fluid supplied by the raiser column (24) to the expander (12).