Direct Contact Heat and Mass Exchanger for Heating, Cooling, Humidification, and Dehumidification

Marip Kum Ja*, Qian Chen, Muhammad Burhan, Doskhan Ybyraiymkul, Muhammad Wakil Shahzad, Raid Alrowais, Kim Choon Ng

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

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A direct-contact heat and mass exchanger (DCHME) has many advantages over a traditional surface-type heat exchanger, including a high heat transfer coefficient, simplicity of design, and low OPEX and CAPEX. DCHME has a capability to exchange of both heat and mass between the two fluids in the same process. Hence, DCHMEs are widely used in numerous applications in various industries, including the air conditioning industry for cooling and dehumidification and heating and humidification. Based on their structure, DCHME can be categorized into two groups; two fluids direct contact (TFDC) exchanger and two direct contacts with one non-contact fluid (TDCONF) exchanger. This study developed a mathematical model for these two types of exchangers by using a discretized volume with distributed lumped-parameters method instead of using the conventional log mean enthalpy difference (LMHD) and NTU-effectiveness method. Thus, this model can reflect both heat and mass transfer behavior in every spatially distributed physical system. The objective of this study is to develop a mathematical model to be used as a tool for designing DCHME and to be applied as a sub-function of the model predictive control system to predict the effectiveness and dependent parameters of DCHME under the different load conditions and its various input parameters.
Original languageEnglish
Title of host publicationHeat Exchangers
EditorsLaura Castro Gómez, Víctor Manuel Velázquez Flores, Miriam Navarrete Procopio
Place of PublicationRijeka, Croatia
Number of pages31
ISBN (Electronic)9781839697920, 9781839697937
ISBN (Print)9781839697913
Publication statusPublished - 23 Mar 2022


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