Emulsion Coating Film Drying Chamber’s Air Conditioning Design Scheme Research

This paper is taking air conditioning of Shantou’s film drying chamber as the researchobject, First of all, comparing and selecting the drying period’s different dehumidifyingmethods of modular constant temperature and humidity air conditioning design scheme.After, determining the drying period’s supply air volume and desiccant method, usingPhoenics software, analyzing different air supply conditions having the influence of thetemperature field and velocity field on the emulsion coating film under the way of supplyair and return air mode.In view of the specialty of the film drying chamber, which belongs to the dark roomoperating space and big wet load, and requires more strict with the indoor temperature andhumidity. By analyzing enthalpy and wet on modular constant temperature and humidityair conditioning of using different dehumidifying methods and choosing treatment designscheme; selecting to meet technological requirements of energy-saving dehumidifyingmethods, and using CFD simulation technology optimization to select, improving thedrying rate’s airflow organization form. By studying given the following conclusions asfollows:1.On this topic of the medium temperature section in the film drying room, puttingforward two kinds of desiccant designing schemes: frozen dehumidification combiningrefrigerator air condensing heat recovery of refrigerator and dry desiccant combining wasteheat recovery of regenerating air. Comparing two designing schemes found that the savingcooling capacity and reheating of scheme1is less55.8%and80.1%than scheme2, sochoosing the scheme of dry desiccant combining waste heat recovery of regenerating air.2. In the premise of constant temperature air supply, under the way of supply air andreturn air mode, change the spacing of air supply outlet, height of air supply outlet, thesupply air velocity and air supply outlet size, by simulating found that has no effect onemulsion coating film by changing the working conditions of different combinations andair supply air’s parameters.3. When the air supplying outlet is between30to60mm above the emulsion coatingfilm, it almost has no effect on the vertical velocity below the air supplying outlet, buthaving larger influence for horizontal air flow rate on emulsion coating film, especially forthe influence of the edge’s velocity field on the emulsion coating film is more noticeable.When the air supplying outlet is between30to40mm above the emulsion coating film, themaximum speed is below the air supplying outlet, the medium speed is at the edge of theemulsion coating film and the minimum speed is in the center of both air supplying outlets. It’s found that narrowing the spacing between the two inlets and shrinking the sizeof the length direction of air supplying outlet at the same time can make the speed of thefilm edge and air supplying outlet below the film is nearly close, and the speed of thecenter between the two inlets also has greatly improved by adjusting the spacing betweentwo inlets and the size of the length direction of the air supplying outlet.4. When the air supplying outlet is60mm above the emulsion coating film, the speed ofair supplying outlet below the inlet has large influence for the right vertical velocityattenuation, the bigger wind speed of air supplying outlet is increasing, the bigger velocityattenuation degree is damping.5. The article comprehensively analyze above9kinds of operating mode and comparethe simulating results,combining with non-uniform coefficient, energy utilizationcoefficient and the drying rate were compared by that condition9is the optimal designingcondition. Its working condition: the air supply outlet of the distance on the top of theemulsion coating film is40mm,14m/s of air supplying outlet velocity,100mm of thespacing of both air supply outlets, unilateral return air.