This paper proposes a method by means of which it is possible to calculate the circulation and evaporation rates and thus optimise the design of pans. It is shown that when designing batch pans there is an optimum combination of tube length, diameter and circulation ratio to produce maximum circulation for a given graining volume and heating surface/volume ratio. Similarly when designing contin...

Desiccant wheels are widely used in buildings to control humidity and reduce energy consumption. A model is presented based on transient coupled heat and mass transfer, to model, design and analyze the effects of geometrical characteristics of a honeycombed rotary desiccant wheel and its performance. Governing equations are solved numerically using finite volume method and the model is validate...

the aerial oxidation of hydroquinone in a freshly prepared developer solution at 20°c has been studied through the measurement of concentration changes by a spectrophotometric method. the concentration of consumed hydroquinone is directly proportional to time, and the equation til2 = c, / 0.0786 was obtained to calculate the half-life of the developer. in this equation, the half-life is in hour...

In this paper, the classical economic production quantity (EPQ) model is developed for non-instantaneous deteriorating items by considering a relationship between the holding cost and the ordering cycle length. Two models are developed. First, the proposed model is considered when backorders are not permitted and this condition is waived for the second case. The cost functions associated with t...

We propose a simple method for prediction of the 11-year solar cycle maximum that is based on two relations. One them well known Waldmeier's rule binds amplitude and length its ascending phase. The second relates given from minimum to next one. Using corresponding linear regressions we obtain amplitide 25 in scale 13-month smoothed monthly total revised sunspot number ${\rm SN}_{\rm max}(25) = ...