Dynamic Analysis of Cool Thermal Storage Air Conditioning System

빙축열 에어컨의 동적 사이클 해석

  • Published : 2008.02.28

Abstract

In this study, dynamic characteristics analysis of AC system is investigated using a cool thermal storage system. A analysing program for cool thermal storage AC system is developed. The performances are studied by several variables and dynamic characteristics. Comparing the result at conventional operation condition with that at the condition using ice storage system, this study showed the effects of the sub cooled degree, superheated degree, efficiency of compressor and evaporating temperature. At the condition using thermal storage system, the thermal storage process was operated during midnight being not needed the cooling of the AC unit through the continuous running of the condenser. The refrigerant was sub-cooled using stored energy after being discharged from the air source condenser during the daytime. The COP was increased owing to the sub-cooling of refrigerant during daytime, thus the power consumption was effectively decreased.

Keywords

References

  1. Kim, Y. J., et al., 2004, Performance analysis for CO2 system with sub-cooling loop, Proceeding of the SAREK 2004 Summer Annual Conference, pp. 237-242
  2. Kim, O.J, 2006, A Study on the Energy Storage System Using Air Source Heat Pump for Heating and Cooling, Proceeding of the SAREK 2006 Summer Annual Conference, pp. 1125-1130
  3. Dong-Won Lee., et al., 2007, Sub-cooling Effect using Cold Storage System, Proceeding of the SAREK 2007 Summer Annual Conference, pp. 1067-1071
  4. Jekel, Todd, "Modeling of Ice-Storage Systems,'M.S. Thesis, University of Wisconsin - Madison, December 1991
  5. Chong, S .G., 2006, Dynamic Characteristics Analysis of Heat Pump System for Heating Using Sewage Water as a Heat Source, Proceeding of the SAREK 2006 Winter Annual Conference, pp. 293-298
  6. Choi., J. G.., et al., 2001, Experiment al Study on Super heat Control of a Variable Speed He at Pump, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 18, No. 6, pp. 507-514
  7. Choi, J. G., et al., 2001, Performance of the Flow Distribution and Capacity Modulation of a Multi Heat Pump, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 18, No. 6, pp. 507-514
  8. Moon, Y. C., 2004, Performance Coefficient Variation of the Geothermal Heat pump System accompanied by Cooling.Heating Operation, Proceeding of the SAREK 2004 Summer Annual Conference, pp. 1334-1338
  9. KMA, Dongjak-gu Seoul Korea, URL: http://www.kma.go.kr/intro.html
  10. KEPCO, Kangnam-gu Seoul Korea, URL: http://cyber.kepco.co.kr/cyber/personal/pay ment/payment_calculate/payment_calculate.jsp