Experimental investigation of low temperature distillation coupled ...
Why it matters
According to the researchers, the use of a heat transformer or temperature amplifier is an alternative to recover waste heat and to obtain distilled water. The heat transformer can be operated with residual heat at medium temperature to obtain a quantity of low useful heat with a high temperature. A way of quantifying its performance is by the ratio between useful heat and source heat, called coefficient of performance. Based on previous research studies, there are no theoretical works on heat recycling applied to only one component of heat source into a heat transformer using a water purification system to atmospheric pressure. This work is a continuation of reported work on the increase of the coefficient of performance into a heat transformer using a water purification system, when heat recycling is only applied to total heat source. The authors presented a theoretical proposal in order to obtain maximum efficiency of energetic use.
ReferenceThe article appears in the July 2010 issue of the Desalination journal (volume 257, issues 1-3, pages 8-15). Authors: A. Huicochea & J. Siqueiros .
AbstractOne application of a heat transformer consists in obtaining purified water through single effect evaporation. A fraction of the obtained heat in the absorber can be recycled to only one component of heat source (either in the generator or in the evaporator) to improve efficiency of energy use of the equipment itself. This paper shows the results obtained with a thermodynamic simulator, using lithium bromide–water as working solution at different operation conditions in a 700 W experimental heat transformer. The behavior of Enthalpy Coefficient of Performance is presented as a function of the absorber temperature under different performance conditions in the generator and evaporator. The coefficients of performance are compared to various increases in the temperature of heat source by applying heat recycling to only one component and both components. Under the same performance conditions, when the heat recycling is applied to the generator, the coefficient of performance results in a 110.3% increase, while applied to the evaporator, it results in a 61.5% increase and 79.3% when it is recycling in both components.
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Algebraic methods for signal processing and communications coding
It produces a generator polynomial with binary coefficients. Finally, there are also BCH codes in the field Q with transforms in Qm (and even BCH codes in ...Find An Article Directory
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