After strontium/transuranics removal by precipitation followed by cesium/technetium removal by ion exchange, the remaining low-activity waste in the Hanford River Protection Project Waste Treatment Plant is to be concentrated by evaporation before being mixed with glass formers and vitrified. To provide a technical basis to permit the waste treatment facility, a relatively organic-rich Hanford ...

Studied is a kind of NH3/CO2 two-stage low temperature refrigeration system, in which NH3 is used as the refrigerant in the high-temperature stage and CO2 is used as the refrigerant in the low-temperature stage. The performance of the system is simulated and analyzed by changing the mean temperature of the evaporator-condenser and the temperature of the condenser. The mean temperatures of the e...

This Paper Presents The Concept Of Analytical Study Ofvapour Compression Refrigeration System Using Diffuser And Subcoolingmainly Carried Out To Improve The Coefficient Of Performance Of System. To Improve The Coefficient Of Performance, It Is To Required That Compressor Work Should Decrease And Refrigerating Effect Should Increase. Initially The Diffuser Of Increasing Cross-Sectional Area Prof...

The first and second law of thermodynamics are applied to an ionic-liquid (IL) based absorption refrigeration system for high power electronics cooling. The IL is a salt in a liquid state usually with an organic cation and inorganic anion. It provides an alternative to the normally toxic working fluids used in the chemical compression loop, such as ammonia in conventional absorption systems. Th...

THE MATHEMATICAL MODEL AND NUMERICAL SIMULATION OF THE HEAT PUMP SYSTEM 1. COLLEGE OF APPLIED SCIENCES – SUBOTICA TECH, SERBIA 2. BUDAPEST UNIVERSITY OF TECHNOLOGY AND ECONOMICS, HUNGARY ABSTRACT: In this paper water-water heat pump is analyzed using a computer simulation. The simulation program is based upon steady state mathematical models of the refrigeration system components. The numerical...

As part of the ongoing research on finned L-shape heat pipes for electronic cooling, the present work focuses on the optimization of the thickness and permeability of wick structure of L-shape heat pipe, using different working fluids. DOptimal Designs Software is used to obtain the optimal solution to align the competing parameters such as the working fluid properties, thickness of the wick an...

With increasing efficiency standards and higher energy costs, the demand for reversible air-conditioning/heat pump systems is increasing throughout the stationary market. The heat exchangers in such reversible systems must perform reliably as both evaporator and condenser. The outdoor coil, specifically, is subject to very large changes in both operational pressures and temperatures. With this ...

This paper focuses on the computer cooling capacity using the thermosyphon loop with minichannels and minipump. The one-dimensional separate model of two-phase flow and heat transfer in a closed thermosyphon loop with minichannels and minipump has been used in calculations. The latest correlations for minichannels available in literature have been applied. This model is based on mass, momentum,...

A multi-effect distillation where the condenser of a high pressure column is integrated with the reboiler of a low pressure column has been studied. The method of selfoptimizing control has been used to provide a systematic procedure for the selection of controlled variables, based on steady-state economics. The system has 10 degrees of freedom at steady state. The heat integrated distillation ...

In most of the Automotive Air Conditioning Systems (AACSs) though the compressor is powered by the car engine, the evaporator blower and the condenser fan are run by a 12-volt DC battery which is powered by an alternator. Any fault in the alternator, drops the battery output voltage. Owing to this, a stationary test rig for an AACS is developed with all actual automotive components. A continuou...