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Coal's quality deterioration has been assessed by measuring its carbon and hydrogen contents, calorific value, hard groove grindability index, and reactivity by a differential-scanning calorimeter (DSC). The deterioration, was more prominent in sunny days with intermittent rain. Annually...
On the basis of a new irreversible three-heat-source refrigerator model, an ecological optimization criterion is proposed for the best mode of operation of the refrigerators, which consists of maximizing a function representing the best compromise between the cooling rate and entropy production...
The energy process model with geometric distributed lag (GDL) demand, called the energy GDL process model, often distinguishes several regions. This paper presents a new decomposition approach, based on the Dantzig–Wolfe principle, to decompose such a model by region in order to provide a more...
This paper describes a simple analysis for the prediction of pressure within a spark ignition engine. This is done by modelling the combustion process using the Wieb function approach, which is an exponential function in the form y =1− e −ax m , to calculate the rate of fuel burned. By...
During the past decade, there has been unprecedented research interest in vapour-absorption cycle refrigeration and heat pumping driven by the need to reduce CO 2 emissions related to process and comfort cooling. This paper reviews some recent innovations in vapour absorption-cycle technology,...
An experimental investigation has been performed to study the forced convection and pressure-drop characteristics fully-developed steady turbulent flows in air-cooled, horizontal, equilateral-triangular ducts. These ducts were constructed of duralumin, each of the same axial length and hydraulic...
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