This paper describes numerical modeling of heat and mass transfer in exchangers utilizing the Maisotsenko Cycle for indirect evaporative cooling. For this purpose, numerical models are developed based on the modified ϵ-NTU method to perform thermal calculations of the indirect evaporative cooling process, thus quantifying overall performance of considered heat exchangers. The numerical modeling results have been corroborated against existing experimental data. Numerical simulation reveals many unique features of considered heat and mass exchangers, enabling an accurate prediction of its performance. The results of computer simulation showed high efficiency gains that are sensitive to various inlet conditions, and allow for estimation of optimum operating conditions, including suitable climatic zones for the proposed units. A comparative analysis was performed to analyze which unit obtains the highest efficiency. The results indicated that currently produced cross-flow heat and mass exchanger achieves highest cooling capacity, while the counterflow regenerative unit is characterized with the lowest outlet temperatures.

The aim of this study is to determine which of the heat exchangers is characterized by the highest efficiency in different applications. Various types of evaporative air coolers were compared: a typical counter-flow unit, the same unit operating as a heat recovery exchanger, a regenerative unit and a novel, modified regenerative exchanger. The analysis includes comparing the work of evaporative heat exchangers during summer and winter season. The analysis is based on the original mathematical models. The numerical models are based on the modified ε-NTU (number of heat transfer units) method. It was established that selected arrangements of the presented exchangers are characterized by the different efficiency in different air-conditioning applications. The analysis faces the main construction aspects of those evaporative coolers and also compares two above-mentioned devices with modified regenerative air cooler, which can partly operate on cooled outdoor airflow and on the exhaust air from conditioned spaces. This solution can be applied in any climate and it is less dependent on the outdoor conditions. The second part of the study focuses on winter season and the potential of recovering heat with the same exchangers, but with dry working air channels. This allows establishing their total potential of generating energy savings during the annual operation.

In the article the performance of the advanced indirect evaporative air cooler has been investigated. The application of the heat and mass exchanger in an air conditioning systems have been analyzed according to the typical climatic conditions in Poland. The considered indirect evaporative air cooler is based on the cross-flow heat and mass exchanger model with the Maisotsenko cycle (M-Cycle). The main conclusion is that an application of heat and mass exchanger with the M-Cycle to the typical air conditioning systems to the typical climatic conditions in Poland is characterized by the high cooling efficiency.