Experimental investigation of a Thermally Driven Heat Pump based on a double Organic Rankine Cycle and an oil-free Compressor-Turbine Unit

2014 ◽  
Vol 44 ◽  
pp. 91-100 ◽  
Author(s):  
Jonathan Demierre ◽  
Daniel Favrat ◽  
Jürg Schiffmann ◽  
Johannes Wegele
Keyword(s):  
Experimental Investigation ◽  
Heat Pump ◽  
Turbine Unit ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Thermally Driven

Modeling and Experimental Investigation of an Oil-Free Microcompressor-Turbine Unit for an Organic Rankine Cycle Driven Heat Pump

2014 ◽  
Vol 137 (3) ◽  
Author(s):  
Jonathan Demierre ◽  
Antonio Rubino ◽  
Jürg Schiffmann
Keyword(s):  
Turbine Unit ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Heat Pumps ◽  
Tip Clearance ◽  
Vapor Compression ◽  
Heating And Cooling ◽  
Vapor Compression Cycle ◽  
Compression Cycle ◽  
Thermally Driven

Domestic heating and cooling will more and more have to rely on heat pumps (HPs) in order to support a more rational use of primary energy consumption. The HP market is mainly dominated by electrically driven vapor compression cycles and by thermally driven sorption processes. The drawback of electrically driven vapor compression cycle is their dependence on an electrical grid and the fact that they increase the winter or summer electricity peak demands. Hence, a thermally driven vapor compression cycle would offer substantial advantages and flexibility to the end user for heating and cooling applications. This paper presents the investigation of an oil-free compressor-turbine unit (CTU) used for a thermally driven HP (TDHP) based on the combination of a HP compression cycle and an organic Rankine cycle (ORC). The CTU consists of a radial inflow turbine and a centrifugal compressor of the order of 2 kW each, directly coupled through a shaft supported on gas lubricated bearings. The CTU has been tested at rotor speeds in excess of 200 krpm, reaching compressor and turbine pressure ratios up to 2.8 and 4.4, respectively, and isentropic efficiencies around 70%. Comparisons between the experimental data and predictions of models, that are briefly described here, have been carried out. A sensitivity analysis based on the experimentally validated models shows that tip clearance, for both compressor and turbine, and surface roughness of the compressor are key parameters for further improving performance.

Modeling and Experimental Investigation of an Oil-Free Micro Compressor-Turbine Unit for an ORC Driven Heat Pump

2014 ◽  
Author(s):  
Jonathan Demierre ◽  
Antonio Rubino ◽  
Jürg Schiffmann
Keyword(s):  
Heat Pump ◽  
Turbine Unit ◽  
Organic Rankine Cycle ◽  
Primary Energy ◽  
Heat Pumps ◽  
Tip Clearance ◽  
Heating And Cooling ◽  
Compression Cycle ◽  
Thermally Driven ◽  
Vapour Compression

Domestic heating and cooling will more and more have to rely on heat pumps in order to support a more rational use of primary energy consumption. The heat pump market is mainly dominated by electrically driven vapour compression cycles and by thermally driven sorption processes. The drawback of electrically driven vapour compression cycle is their dependence on an electrical grid and the fact that they increase the winter or summer electricity peak demands. Hence, a thermally driven vapour compression cycle would offer substantial advantages and flexibility to the end user for heating and cooling applications. This paper presents the investigation of an oil-free Compressor-Turbine Unit (CTU) used for a Thermally Driven Heat Pump (TDHP) based on the combination of a heat pump compression cycle and an Organic Rankine Cycle (ORC). The CTU consists of a radial inflow turbine and a centrifugal compressor of the order of 2 kW each, directly coupled through a shaft supported on gas lubricated bearings. The CTU has been tested at rotor speeds in excess of 200 krpm, reaching compressor and turbine pressure ratios up to 2.8 and 4.4 respectively and isentropic efficiencies around 70%. Comparisons between the experimental data and predictions of models, that are briefly described here, have been carried out. A sensitivity analysis based on the experimentally validated models shows that tip clearance, for both compressor and turbine, and surface roughness of the compressor are key parameters for further improving performance.

Study on the Performance of Organic Rankine Cycle-Heat Pump (ORC-HP) Combined System Powered by Diesel Engine Exhaust

2019 ◽  
Vol 28 (5) ◽  
pp. 1065-1077 ◽  
Author(s):  
Tenglong Zhao ◽  
Fei Yu ◽  
Hongguang Zhang ◽  
Yuting Wu ◽  
Yan Wang
Keyword(s):  
Diesel Engine ◽  
Heat Pump ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Combined System ◽  
Engine Exhaust ◽  
Diesel Engine Exhaust

scholarly journals Reversible Heat Pump–Organic Rankine Cycle Systems for the Storage of Renewable Electricity

Energies ◽  
2018 ◽  
Vol 11 (6) ◽  
pp. 1352 ◽  
Author(s):  
Sebastian Staub ◽  
Peter Bazan ◽  
Konstantinos Braimakis ◽  
Dominik Müller ◽  
Christoph Regensburger ◽  
...  
Keyword(s):  
Heat Pump ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Renewable Electricity ◽  
Cycle Systems

scholarly journals Experimental Investigation on Characteristics of Evaporator Vaporization and Pressure Drops in an Organic Rankine Cycle (ORC)

2015 ◽  
Vol 75 ◽  
pp. 1631-1638 ◽  
Author(s):  
Kaiyong Hu ◽  
Jialing Zhu ◽  
Tailu Li ◽  
Xinli Lu ◽  
Wei Zhang
Keyword(s):  
Experimental Investigation ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Pressure Drops

scholarly journals Performance of a reversible heat pump/organic Rankine cycle unit coupled with a passive house to get a positive energy building

2016 ◽  
Vol 11 (1) ◽  
pp. 19-35 ◽  
Author(s):  
Olivier Dumont ◽  
Carolina Carmo ◽  
Valentin Fontaine ◽  
François Randaxhe ◽  
Sylvain Quoilin ◽  
...  
Keyword(s):  
Heat Pump ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Positive Energy ◽  
Passive House
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