Analytical Investigation of a Novel System for Combined Dew Point Cooling and Water Recovery

Abstract

This paper presents the analytical investigation of a novel system for combined Dew Point Cooling and Water Recovery (DPC-WR system). The operating principle of the presented system is to utilize the dew point cooling phenomenon implemented in two stages in order to obtain both air cooling and water recovery. The system performance is described by different indicators, including the coefficient of performance (COP), gained output ratio (GOR), energy utilization factor (EUF), specific energy consumption (SEC) and specific daily water production (SDWP). The performance indicators are calculated for various climatic zones using a validated analytical model based on the convective heat transfer coefficient. By utilizing the dew point cooling phenomenon, it is possible to minimize the heat and electric energy consumption from external sources, which results in the COP and GOR values being an order of magnitude higher than for other cooling and water recovery technologies. The EUF value of the DPC-WR system ranges from 0.76 to 0.96, with an average of 0.90. The SEC value ranges from 0.5 to 2.0 kWh/m3 and the SDWP value ranges from 100 to 600 L/day/(kg/s). In addition, the DPC-WR system is modular, i.e., it can be multiplied as needed to achieve the required cooling or water recovery capacity.

An Experimental Study to Apply an Absorption Refrigeration Cycle as a Dehumidifier in Humidification-Dehumidification Solar Desalination System

“…Considering the crucial importance of sunlight in the operation of HDH systems, there have been multiple kinds of research regarding the operation of HDH systems in unsuitable climates. Cichoń and Worek [7] studied the operation of an HDH system under an unsuitable climate condition and decreased dehumidification temperature. Their study focused on producing water with better GOR in cold climate conditions with low radiation intensity.…”