A novel approach using predictive models for performance analysis of desiccant enhanced evaporative cooling systems. (25th August 2016)

• Record Type: Journal Article
• Authors: Sohani, Ali; Sayyaadi, Hoseyn; Hasani Balyani, Hamidreza; Hoseinpoori, Sina
• Is Part Of: Applied thermal engineering. Volume 107(2016:Aug.)
• Page Start: 227
• Page End: 252
• Publication Date: 2016-08-25
• Subjects: Analytical expression -- Dehumidifier -- Desiccant enhanced evaporative cooling systems -- DEVAP -- M-cycle indirect evaporative cooler -- Soft computing and statistical methods; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2016.06.121
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: DEVAP system was modeled using the five SCST tools. Models were developed to predict Tout and ωout of DEH. The outlet temperature of the M-cycle stage was also predicted. Comprehensive modeling and sensitivity analysis were conducted on the DEH. Suggestion for enhancing the operation of the DEH was presented. Abstract: A thorough investigation on parameters that having the potential impact on performance of the desiccant enhanced evaporative air conditioning, DEVAP, system was conducted. Five soft computing and statistical tools, SCST, including the artificial neural network, ANN, group method of data handling, GMDH, genetic programming, GP, multiple linear regression, MLR, and stepwise regression method, SRM, were used to predict the overall performance of DEVAP system. These SCST models were trained and tested using numerical and experimental data. The dehumidifier stage was assumed to be incorporated separately into two different types of counter flow indirect dew point evaporative coolers as the second stage. For each stage, the best SCST models have been determined through comparing with experimental data via error criteria, including the mean square error (MSE), and coefficient of determination (R 2 ). It was found that the GMDH and SRM methods propose the foremost models for evaluating the performance of the second stage. Furthermore, SRM approach was found to be the best model describing the performance of the dehumidifier. Then a comprehensive sensitivity analysis was conducted for dehumidifier part. It was concluded that an effective strategy for improving dehumidifier is the implementing a part of its product air as the working air.