Exact(2)
Thermodynamic performance analysis of refrigerants R290 and R22 was carried out using standard vapour compression cycle, with evaporating temperature range of -25°C to 10°C for the condensing temperature of 45°C, based on analytical calculations.
Investment costs are a bit higher than those for standard (vapour compression) air conditioning systems: A direct evaporative cooler costs about one third (1/3), a two-stage evaporative cooler about two thirds (2/3) more than comparable mechanical cooling equipment.
Similar(58)
The components used in the air-cycle demonstrator were not optimised and considerable potential exists for efficiency improvements, possibly to the point where the air-cycle system could rival the efficiency of the standard vapour-cycle system at part-load operation, which represents the biggest proportion of operating time for most units.
High concentration of standard water vapour can be made due to their superior permeation rate.
Thermodynamic evaluation of standard rating cycle of vapour compression refrigeration system is carried out.
The NFPA 59A (2009) standard states that LNG vapour dispersion models are acceptable for use if they have been evaluated in accordance with this protocol.
These patients will receive standard medical management and vapour ablation treatment over the course of two sessions.
Spots were identified by migration and revelation of the choline and phosphorylcholine standards with iodine vapours.
The standard methods to determine the vapour permeability and the moisture sorption curve may lack of accuracy since discrepancies are observed when comparing numerical predictions to experimental data.
One third of the patients will be randomized to the control arm and will receive standard medical management alone without vapour ablation treatment.
The derived standard molar enthalpies of sublimation and vapour pressures are in excellent agreement with the mean of the available literature values and with the recommended values.
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