Browsing by Subject "compression refrigerator"

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Access status: Open Access ,
Chłodzenie powietrza w wyrobiskach chłodziarką sprężarkową o działaniu bezpośrednim
(Wydawnictwa AGH, 2011) Branny, Marian; Filek, Krzysztof; Swolkień, Justyna
Problem of air-cooling in blind headings with duct, exhausting systems of ventilation is considered. Performance of two types of compression refrigerators were tested. Calculations were made for different volume flows of air through evaporator and for different air temperatures in heading. Parameters of cooled air and cooling power of evaporators were calculated using mathematical model of compression refrigerator developed in [1]. The results of calculations are presented in the form of plots and tables. Cooling power of evaporators and its division on sensible and latent part was shown on diagrams.
Access status: Open Access ,
Moc cieplna wymienników górniczej sprężarkowej chłodziarki powietrza
(Wydawnictwa AGH, 2009) Nowak, Bernard; Filek, Krzysztof
This article applies to mine compression refrigerator of air. In this article, work of refrigerator with or without inner regenerative heat exchanger (subcooler) is considered. The equations are given, from which thermal powers of evaporator, condenser and subcooler of refrigerator are determined. Focused character of all elements of refrigerator is assumed (expect specified, compressor and expansion valve also). For refrigerator with subcooler, system compound with 12 algebraic equations is received, in which unknowns are: temperature and humidity of cooled air, temperature of water after the condenser and temperature of refrigerant in five characteristic points of its circulation and ariolity degree of refrigerant of evaporator's inlet. For refrigerator without subcooler, the system is composed of 9 equations with the same as before unknowns, with the exception of 3 equations refer to subcooler.