A new appliance of LPG as a current factor in the heat pump and refrigerating systems

• Autorzy: Białko B. , Królicki Z.
• Języki publikacji: EN

Abstrakty

EN

Abstract Liquefied petroleum gas (LPG) is a fuel which is widely applied in transport engineering. It consists of saturated hydrocarbons, especially propane, butane and other substances (less than 1 %). These two main components are used in refrigerators, air-conditioners and heat pumps as well and are known as HC 290 (propane) and HC 600a (isobutane). In recent years when ecological aspects of refrigerants application are very important for designers and manufactures LPG can be considered as substitute for R134a. Experimental results of the refrigerators using LPG show that the lowest electrical energy consumption, higher volumetric cooling capacity and lower freezer temperature can be achieved compared to R134a. But the composition of this zeotropic mixture depends on a season. During the winter the mixture consists more propane whereas during the summer butane is a dominant component of the mixture. These conditions change the characteristic parameters of the cycle. The paper presents theoretical analysis and experimental results of a pressure ratio, power consumption and COP changes depending of LPG composition and discuss with the thesis that LPG can be an appropriate long-term candidate to replace R134a in the existing and new heat pumps and refrigerators.

Słowa kluczowe

EN

heat pump; LPG; zeotropic mixture

PL

LPG; pompy ciepła; zeotropowa mieszanina

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2008
• Tom: Vol. 29, no. 4
• Strony: 3--12
• Opis fizyczny: Bibliogr. 9 poz.,wykr., wz.,

Twórcy

autor

Białko B.

autor

Królicki Z.

• Politechnika Wrocławska, Instytut Techniki Cieplnej i Mechaniki Płynów, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław,

Bibliografia

• [1] BIAŁKO B.: Optimisation of ozone non-destructive refrigerant mixtures in systems acomplishing refrigeration cycles, PhD Thesis, Wrocław University of Technology, ITCiMP I-20, Wrocław 2000 (in Polish).
• [2] BIAŁKO B.: The selection and optimization of appropriate proportions for a mixture of propane and isobutane, [in:] 21st Int. Congress of Refrigeration, August, 17-22, Washington, DC, USA, 2003.
• [3] BILAL A. AKASH, SALEM A. SAID: Assessment of LPG as a possible alternative to R-12 in domestic refrigerators, Energy Conversion and Management, 44, 2003, 381-388.
• [4] FATOUH M., EL KAFAFY M.: Experimental evaluation of a domestic refrigerator working with LPG, Applied Thermal Engineering 25, 2006, 1593-1603.
• [5] MACZEK K., KOZIEŃ A., WARCZAK W.: Feasibility of application of refrigerants in refrigeration technology air-conditioning and hest pumps, [in:] Proc. of the COCH Conf., Paper No. 1, Kraków, Poland, 1995, 1-18 (in Polish).
• [6] PEDERSEN P. H., POULSEN C.S., GUNDTOFT S.: Commercial refrigerators and freezers with isobutane, Natural Working Fluids ’98 IIR-Gustav Lorentzen Conference, Oslo, Norway, 1998, 627-635.
• [7] SCHNOTALE J., MACZEK K.: Multicomponenet mixtures as refrigerants in accomplishing refrigeration cycles, Proc. of XVII Congress of Thermodynamicists, Vol. 3 Kraków 1999, 1197-1206 (in Polish).
• [8] SZARGUT J.: Technical Thermodynamics, WNT, Warszawa 1991, 336 p. (in Polish).
• [9] WIŚNIEWSKI S.: Technical Thermodynamics, WNT, Warszawa 1980(in Polish).