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Pulp and paper industry is a highly energy intensive and the drying section of the paper machine consumes 64 % of total energy. The heat of the humid hot air resulting from the drying process has a usable energy potential which has to be recovered and represents a secondary energy resource. This paper analyses efficiency of introducing a complex heat recovery, in three stages, integrated into the...
State-of-the-art marine microalgae utilization processes were proposed and their performance with respect to energy consumption was evaluated. Enhanced process integration technology was developed and applied in continuous integrated energy utilization processes of microalgae. The enhanced process integration was developed based on two main principles, first, conventional process integration and,...
The use of clothes dryers in household is becoming more common, however, traditional clothes dryers consume large amount of electric energy. A new type of domestic heat-pump dryer is introduced in the paper. Summarizes its operating principle and basic structure, meanwhile, indicates the arithmetic of design and selection of some important component. Compared the power consumption, effect of drying...
In order to resolve the problems of medlar dehydration and improve the quality of dried fruit, the large scale solar-hot blast stove combined drying plant was designed according to the medlar's characteristics and properties. The structural design, collector and control system design was completed and drying experiment of medlar was conducted. The results of experiment presented that the drying time...
The design is bio-fuel raw material drying equipment which is cross-flow belt dryer based on high-temperature hot water as the medium. According to the drying experiments, obtained the drying curve of materials at different temperatures. Through the experimental data, the general parameters of dryer were determined. The features of this design is that heat from the high-temperature hot which comes...
Cold storage systems are great energy users in many countries, so the recycling of condensing heat is greatly concerned by people. Take large cold storage refrigeration systems for the research background, based on the heat pump heat recycling technology, the cold storage heat recovery system had been designed. Combined with heat pump drying technology, the quantity of heat recovered was just enough...
This paper introduces a new type of drying slime technology - solar drying slurry technology, And analysis the effect of drying coal slime from the nature of the slime, dry air, drying equipment, according to the theoretical analysis of the impact of the factors, The suggest can be obtained to enhance the drying efficiency of slime.
A research project was completed which demonstrated the use of a new design of electric heat pump in a softwood lumber drying operation. Data was collected over one year of kiln operation at a lumber mill in Georgia. Results showed an average Coefficient of Performance of 2.69.
In the typical operation conditions of vacuum freeze drying, the relationship between the diffusion mass transfer and the sample's porous structure is analyzed. The heat and mass transfer models of the freeze drying are setup, and numerically solved by the finite volume method with fixed grids. The results show that the drying processes are significantly influenced by structural parameters, the diameter...
In recent years microwave drying has been studied as an extended method of drying to obtain high quality products including fruits, vegetables and grains. Major advantages of microwave drying of foods are higher drying rate, energy saving and uniform temperature distribution giving a better product quality. As yet the kinetics of microwave drying process has been investigated by means experiments...
This paper introduces the dehydration of brown coal drying technology, and analyzes their characteristics, the low-temperature drying of lignite properties have been studied, results showed that the finer the coal particle size, dry the better, and in the low-temperature drying process, the coal is not spontaneous combustion or pyrolysis, after dry coal, absorbent low ignition temperature has been...
This paper presents a new modular solar refrigeration and liquid desiccant air conditioning system composed by adsorption refrigeration system, liquid desiccant system and roof cold radiation. The feasibility and beneficial of this new system are analyzed from both the technical and the economic point of view. It is pointed out that its obvious beneficial can promote the commercialization of this...
Tower vacuum dryer is new drying equipment. Its heating is by hot water through the diamond pipes. So the hot water's flowing has important effect on drying quality. Based on fluid dynamics equation, k-epsiv model, the flowing characteristics in heating pipes was analyzed. The model is implemented and solved with three-dimensions by finite element method (FEM) using the software Gambit and Fluent...
With the depletion of fossil fuel resources and increasing effects of serious environmental pollution, more and more attention is paid to energy-saving and environmental protect. This work proposes the combination of hydrothermal degradation (HTD) and superheated steam (SHS) drying in disposal and processing of degradable organic wastes in municipal solid wastes (MSW). Energy analysis is applied to...
Dry air is used in many manufacturing and chemical industries and plants, and in pneumatic control systems. Silica gel pellets, available in various sizes, are widely used as drying substance as it processes distinct advantages. For reuse in the drying process, it can be quite easily reactivated by heating. In this work a small silica gel drier, fabricated and used earlier by this author, has been...
This paper describes a system, utilizing the Peltier effect, to reduce and control the dew point of hydrogen gas by water condensation and desublimation using thermoelectric coolers and water cooled heat sinks. The design is compared to a two-tube desiccant-drying system used in some commercial proton exchange membrane electrolyzer systems. The desiccant system in the water electrolyzer consumes roughly...
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