Continuous Sorption Cooling in Activated Carbon-Nitrogen Using Metal Foam as Regenerator Indranil Ghosh Cryogenic Engineering Centre, IIT Kharagpur ICEC 26 – ICMC 2016 March 7-11, 2016, Manekshaw Centre, New Delhi, India

Introduction Thermal Compressor Adsorbent beds generate gas flow Cooling: evaporation of refrigerant Vibration free cryogenic cooling in space applications EVAPORATORCONDENSER Temperature swing adsorption Thermal compressor driven sorption cooler schematic

Introduction Mechanical Compressor Driven System Adsorbent beds: condenser / evaporator Cooling: Desorption of gas / vapour Relatively New Development Pressure swing adsorption Mechanical compressor driven sorption cooler schematic

Lacunae Complete Removal of Heat of Adsorption: Time Intensive Longer Cycle Duration: Poor Performance Use of Multiple Beds for Generating Continuous Cooling Operational Hazards: Adsorbent Bed is Connected to Heat Sink or Heat Source in Every Half Cycle

5 Alternative Cycle Continuous Sorption Cooling in Single Tube Schematic of solid sorption cooling in single adsorbent tube Koley S and Ghosh I, 2013 Appl. Ther. Engg 55:

Experimental Results Time temperature pressure record keeping the orifice closed Time temperature pressure record keeping the orifice open Koley S and Ghosh I, 2013 Appl. Ther. Engg 55:

Different Desorption Routes Koley S and Ghosh I 2016, Appl. Ther. Engg. 99 :

Different Desorption Routes Koley S and Ghosh I 2016, Appl. Ther. Engg. 99:

Energy Distribution Koley S and Ghosh I 2016, Appl. Ther. Engg. 99:

Regenerative Solid Sorption Cycle Ghosh I 2014, Proc. Int. Sorption Heat Pump Conf. (Maryland, USA)

Is it Pulse Tube Cooler ? ParametersPulse TubeSorption Cooler FrequencyHertzMili-Hertz ValveRotarySolenoid Origin of CoolingExpansion of GasDesorption TubeEmptyAdsorbent Filled FluidHeliumAdsorbate Table 1: Comparison between pulse tube and present cooling

Experimental Setup: Schematic

Experimental Setup: Pictorial View

Results: Foam Regenerator

Results: Tube Regenerator

Conclusions Regenerator kept inside the bed works better Orifice end temperature is falling below the ambient It is a clear indicative of the sorption heat transfer

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