Lithium bromide absorption refrigerating machines charged with helium for air conditioning and condensation

UDC 621.575

Lithium bromide absorption refrigerating machines charged with helium for air conditioning and condensation

Malinina O. S., Aleksandr V. Baranenko


Abstract
The article deals with the analysis of heat source temperature influence on thermodynamic cycle efficiency for different circuit design of lithium bromide absorption refrigerating machine depending on relative air humidity. Cascade and single-stage circuits and cycles are chosen for calculations. Sun energy has been chosen as an alternative (renewable) heat source. Calculation are made at outdoor air temperature tн.в. = 30 оC, relative humidity φ = 30, 50, 70%, heat source temperature th = (90÷70) оC. Heat source temperature values allowing air conditioning and condensation process taking place are obtained. Cascade circuit is shown to allow reducing heat transfer medium temperature by 15 оС on the average.

Keywords: low-grade energetics, Solar energy, solar plant, solar collector, lithium bromide absorption refrigerating machines, heat source, relative air humidity


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