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EP-WÜT FUNDED PROJECTS proach was necessary in order to be able to model the effect of changing film geometry on fluid flow. For single-phase heat transfer, the model produced results of very good accuracy (5–10%). However, the modelling of heat trans- fer when a phase-transition was also involved (condensation mode) proved significantly more challenging. While it was possible to simulate the physi- cal process of phase change, the energy balance analysis was too inexact for technical application (errors of up to a factor of 10). The coupled modelling was based on the principles of fluid-structure interaction (FSI) and small- scale implementation was possible if simplifications were introduced. It was not possible to perform simulations of the entire geometry of the structure due to the enormous computational resources required by the commercial software package used (>120 GB RAM). The software package consisted of modules for flow, heat and mechanical strength simulations. Work is cur- rently underway to optimise networking between these modules. 3.6.4 Exploitation, commercialisation and dissemination of results The EP-Wüt project demonstrated that polymer films are fundamentally suitable for use in heat exchangers in chemical processes and this important finding provides the basis for further development projects. There are how- ever a number of issues that need to resolved, particularly regarding integ- rity against leaks. The fact that the heat transfer coefficients achievable with polymer film systems were comparable to those attainable in conventional heat exchangers showed that there is real potential for developing polymer film heat exchangers as a marketable technology. The fundamental studies of material properties yielded important insights into material behaviour under combined chemical, thermal and mechani- cal loading – an area that had not been examined previously and for which there were no comprehensive datasets available in the literature. These re- sults have opened up a number of other potential areas of application of these high-performance polymers beyond their use in heat exchangers. They appear particularly attractive for applications involving corrosive me- dia and can replace high-alloy metals or ceramics at temperatures of up to 200 °C. They may also find use as electrical insulators at moderate tempera- tures. The project also yielded important findings concerning the gasket ma- terial (PTFE foams, fluoroelastomers). The results demonstrated the need for further basic research in this area, which in turn can be used to encourage future technical development. For the project partner Calorplast GmbH – a company specialised in the de- velopment and manufacture of heat exchangers from polymeric materials 229PDF Image | Chemical Processes and Use of CO2
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