Abstract
Local parameter evaluation needs so much computing effort and reduces the fastness of code capability. Hence, in this paper a comparison of local and averaged of various model parameters is made in order of finding which parameters could be replaced by averaged value with negligible effect on performance evaluation of a direct contact membrane distillation (DCMD) for solar desalination purposes. In this regard, a one-dimensional model of a DCMD is introduced in which all fluid and membrane properties are evaluated locally as well as temperature-dependent. Then each parameter is replaced by the mean value and the accuracy of developed model is compared by experimental data. Results show that it is possible to alternatively implement mean value without noticeably accuracy loss. In addition, because the experimental data are in laboratory scale a large-scale simulation is also done. A comparison of results shows that for large-scale simulation, it is also possible to use average value parameters instead of local evaluations while the speed of simulation increases significantly and no noticeably accuracy loss occurs.