MATHEMATICAL MODELING OF COOLING UNIT FROM A VACUUM HEAT PUMP DRYER: CASE STUDY OF DRYING CHILLI
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Published:
Apr 3, 2018
Keywords:
vacuum heat pump dryer mathematical model cooling water tank
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Abstract
This paper proposes a preliminary mathematical model of cooling unit from a vacuum heat pump dryer. The mathematical model includes sub models of all basic components, namely, condenser in dry chamber, capillary tube, compressor, cooling water tank and cooling coil in the cooling water tank. The mathematical model is coded into a computer program for evaluating the water temperature in the cooling water tank, time used for reaching that temperature and cop of the system. This mathematical model will be developed to design this system and use to study appropriate system configurations, control system, and design parameters of prime importance to the system.
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บทความวิจัย
References
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Vazquez G; Chenlo F; Moreria R; Cruz E (1997). Grape drying in a pilot plant with a heat pump. Drying Technology an International Journal, 15(3-4), 899–920
Apichart Artnasew.(2010).Development of a vacuum heat pump dryer for drying chilli. Department of Mechanical Engineering, Faculty of Engineer Khon Kaen University.
Fisher SK, Rice CK, Jackson WL. The Oak Ridge heat pump design model: MARK III version program documentation. Report No. ORNL/TM-10192. Oak Ridge National Laboratory; 1988.
Domanski P, Didion D. Computer modeling of the vapor compression cycle with constant flow area expansion device. Report No. NBS BSS 155, NBS, 1983.
Theerakulpisut S. Modelling heat pump grain drying systems. PhD thesis. The University of Melbourne, Australia, 1990.
ASHRAE Handbook Fundamental, 1997.CD-Rom
Siam Compressor Industry Co., Ltd. Specification for compressor.Thailand, 2002
Ozu M, Itami T. Efficiency analysis of power consumption in small hermetic refrigerant rotary compressors. Int J Refrig 1981;4(5):265–70.
Mullen, C.E. Room air conditioner system modeling. M.S.Thesis, 1994, The University of Illinois at Urbana-Champaign.USA.
P.K.Bansal and B.Purkayastha. “An NTU- model foralternative refrigerants”, International Journal of Refrigeration,1998, Vol.21, No.5, pp.381-397
Theerakulpisut, S. Modeling heat pump grain drying system
Charters, W.W.S. and Threerakulpisut,S. “Efficiency Equations for Constant Thickness Annular Fins”, Int.Com. Heat MassTransfer, 1989, Vol.16, No.4, pp.547-558.
Webb, R.L. “Air-side heat transfer correlations for flat and wavy plate fin-and-tube geometries”. ASHRAE Transactions,1990, Vol.96, pp. 445-449
Churchill SW, Chu HHS. Correlating equations for laminar and turbulent free convection from a horizontal cylinder. Int J Heat Mass Transfer 1975;18:1049–53.
A.C.Cleland. “Computer subroutines for rapid evaluation of refrigerant thermodynamic properties”, International Journal of Refrigeration, 1986, Vol. 9 pp.346-351
Wilbert F,Stoecker, Jerold W.Jones. Refrigeration & Air Conditioning. 1982, McGraw-hill International, Singapore
Vazquez G; Chenlo F; Moreria R; Cruz E (1997). Grape drying in a pilot plant with a heat pump. Drying Technology an International Journal, 15(3-4), 899–920
Apichart Artnasew.(2010).Development of a vacuum heat pump dryer for drying chilli. Department of Mechanical Engineering, Faculty of Engineer Khon Kaen University.
Fisher SK, Rice CK, Jackson WL. The Oak Ridge heat pump design model: MARK III version program documentation. Report No. ORNL/TM-10192. Oak Ridge National Laboratory; 1988.
Domanski P, Didion D. Computer modeling of the vapor compression cycle with constant flow area expansion device. Report No. NBS BSS 155, NBS, 1983.
Theerakulpisut S. Modelling heat pump grain drying systems. PhD thesis. The University of Melbourne, Australia, 1990.
ASHRAE Handbook Fundamental, 1997.CD-Rom
Siam Compressor Industry Co., Ltd. Specification for compressor.Thailand, 2002
Ozu M, Itami T. Efficiency analysis of power consumption in small hermetic refrigerant rotary compressors. Int J Refrig 1981;4(5):265–70.
Mullen, C.E. Room air conditioner system modeling. M.S.Thesis, 1994, The University of Illinois at Urbana-Champaign.USA.
P.K.Bansal and B.Purkayastha. “An NTU- model foralternative refrigerants”, International Journal of Refrigeration,1998, Vol.21, No.5, pp.381-397
Theerakulpisut, S. Modeling heat pump grain drying system
Charters, W.W.S. and Threerakulpisut,S. “Efficiency Equations for Constant Thickness Annular Fins”, Int.Com. Heat MassTransfer, 1989, Vol.16, No.4, pp.547-558.
Webb, R.L. “Air-side heat transfer correlations for flat and wavy plate fin-and-tube geometries”. ASHRAE Transactions,1990, Vol.96, pp. 445-449
Churchill SW, Chu HHS. Correlating equations for laminar and turbulent free convection from a horizontal cylinder. Int J Heat Mass Transfer 1975;18:1049–53.
A.C.Cleland. “Computer subroutines for rapid evaluation of refrigerant thermodynamic properties”, International Journal of Refrigeration, 1986, Vol. 9 pp.346-351
Wilbert F,Stoecker, Jerold W.Jones. Refrigeration & Air Conditioning. 1982, McGraw-hill International, Singapore