The energy requirements for the distillation of impure water can be reduced by using either an open-cycle or a closed-cycle heat pump. The purification of typical sea-water, with a concentration of 3·4 weight %, is considered using an open-cycle mechanical vapour-compression (OMVC) heat pump...

An exergy analysis, using a numerical simulation of a continuous ammonia-water absorption cycle for the production of ice, is presented. Its performance is studied by considering the effect on the coefficient of performance and the exergy efficiency of varying the most important parameters. The...

The free choice of operating temperatures in absorption systems is limited by the Gibbs phase-rule and the thermodynamic properties of the working pair. Tables of possible combinations of operating temperatures and concentrations, including flow ratios, Carnot coefficients of performance and...

In this paper a review of solar cooling and refrigeration technologies is presented. A discussion on the main reasons why these technologies are not presently economically feasible is carried out. and two installations in Mexico are analysed.

In the last rice harvest season, experimental results have been obtained on the efficiency and drying quality of a solar assisted heat pump drying prototype system. The system has been operated as a solar and heat pump system and drying curves for the different options have been obtained. The...

The use of a combined solar-heat pump rice drying system is being developed as an alternative to conventional mechanical dryers. The experimental equipment developed is a modified 7 kW R-22 air conditioning unit and is combined with a solar colector for a more precise control of temperature and...

A detailed one-dimensional numerical model describing the heat and fluid-dynamic behavior inside a compound parabolic concentrator (CPC) used as an ammonia vapor generator has been developed. The governing equations (continuity, momentum, and energy) inside the CPC absorber tube, together with...

A solar powered intermittent absorption refrigeration system has been developed and evaluated with the ammonia/lithium nitrate (NH3/LiNO3) and ammonia/lithium nitrate/water (NH3/LiNO3/H2O) mixtures. The system, designed to produce up to 8 kg/day of ice, was developed in the Centro de...

This paper presents the results of a detailed exergy analysis of a tertiary amyl methyl ether (TAME) unit of a crude oil refinery and the application of diabatic distillation to the depentanizer tower of the unit. Diabatic distillation is a separation process in which heat is not only supplied...