OJAppS  Vol.8 No.2 , February 2018
Experimental Investigation of the Cooling Capacity of Gaseous Carbon Dioxide in Free Jet Expansion for Use in Portable Air-Cooling Systems
This paper investigates the possibility of using the free expansion of gaseous CO2 in portable air-cooling systems. The cooling capacity of the gaseous CO2 free jet expansion was calculated using three different approaches and the results showed that the simplified calculations would give approximated cooling values with an 11.6% maximum error. The mass flow rate, upstream pressure and cooling capacity of the gaseous CO2 decreased with time. A maximum 48.5 watts of cooling was recorded at minute 4 and a minimum value of 10.4 watts at the end of the test. The drop in cooling capacity is due to the evaporation of the liquid CO2 inside the small cylinder which cools the two-phase CO2 mixture and causes a pressure drop (from 6 MPa to 2.97 MPa), which also affects the mass flow rate of gaseous CO2 exiting the orifice (from 0.56 g/s to 0.24 g/s). If this cooling technique is to be considered in portable compact-cooling systems, the mass, pressure and cooling capacity drop with time must be solved. One of the solutions could be to cover the cylinder with a heating coat to compensate for the heat absorbed by the evaporation of the liquid CO2.
Cite this paper
Al Sayed, C. , Vinches, L. and Hallé, S. (2018) Experimental Investigation of the Cooling Capacity of Gaseous Carbon Dioxide in Free Jet Expansion for Use in Portable Air-Cooling Systems. Open Journal of Applied Sciences, 8, 62-72. doi: 10.4236/ojapps.2018.82005.
[1]   ASHRAE (2001) Handbook Fundamentals. American Society of Heating, Refrigerating and Air Conditioning Engineers, Atlanta, 111.

[2]   Gatley, D.P. (2000) Dehumidification Enhancements for 100-Percent-Outside-Air AHUs. Heating/Piping/Air Conditioning Engineering, 72, 51-59.

[3]   Harriman, L. (2003) 20 Years of Commercial Desiccant Systems. Where They’ve Been, Where They Are, and Where They’re Going. Heating/Piping/Air Conditioning Engineering, 75, 43-44.

[4]   Hsieh, C.S. (1994) Portable Thermoelectric Dehumidifier. Google Patents.

[5]   Liu, Y.H. and Matsusaka, S. (2012) Characteristics of Dry Ice Particles Produced by Expanding Liquid Carbon Dioxide and its Application for Surface Cleaning. Advanced Materials Research, 508, 38-42.

[6]   Pursell, M. (2012) Experimental Investigation of High Pressure Liquid CO2 Release Behaviour. Hazards Symposium Series No. 158, 164-171.

[7]   Mazzoldi, A., Hill, T. and Colls, J.J. (2008) CO2 Transportation for Carbon Capture and Storage: Sublimation of Carbon Dioxide from a Dry Ice Bank. International Journal of Greenhouse Gas Control, 2, 210-218.

[8]   Pham, L.H.H.P. and Rusli, R. (2016) A Review of Experimental and Modelling Methods for Accidental Release Behaviour of High-Pressurised CO2 Pipelines at Atmospheric Environment. Process Safety and Environmental Protection, 104, 48-84.

[9]   National-Instruments-Corporation.

[10]   Perry, R.H. and Green, D.W. (1999) Perry’s Chemical Engineers’ Handbook. McGraw-Hill Professional.

[11]   Ward-Smith, A. (1979) Critical Flowmetering: The Characteristics of Cylindrical Nozzles with Sharp Upstream Edges. International Journal of Heat and Fluid Flow, 1, 123-132.

[12]   Hebrard, J., Antoine, F. and Lacome, J.-M. (2011) Assessment of the Models for the Estimation of the CO2 Releases Toxic Effects. 12th International Conference on Multiphase Flow in Industrial Plants (MFIP 12), Ischia, 21 September 2011.

[13]   ChemicaLogic-Corporation.