Temperature and pressure dynamics in sorption cells

Autor: A. Davidesko, N. Tzabar
Rok vydání: 2020
Předmět:
Zdroj: Adsorption. 27:117-128
ISSN: 1572-8757
0929-5607
DOI: 10.1007/s10450-020-00270-z
Popis: Sorption processes are incorporated in a wide range of applications. A heat and mass transfer model which calculates the temperature distribution and pressure in a sorption cell is desired for developing any sorption system. In this paper, we present a one-dimensional dynamic numerical model for closed sorption cell systems, which is based on adsorption isotherm measurements of the working pair. The model is governed by energy and mass balances, where a uniform pressure inside the cell is assumed, the thermal contact resistances between different materials are incorporated, and the material properties are temperature dependent. The model is implemented by an implicit finite differences method, aiming to predict the system performance and to allow the optimization of the mechanical design and operating conditions. A design-dependent correction factor is suggested to compensate for the one-dimensional assumption, especially for predicting the pressure in the cell. The numerical model is successfully validated against experimental results of nitrogen—activated carbon systems, at several operating conditions. The numerical model allows extensive investigations on sorption system designs, for example, the dependency of the sorption cell performances on the heater and cooler designs are discussed. The results show that different designs are required for providing either high thermal efficiencies or high inner temperature and pressure. The model is an essential tool in our laboratory for researching and developing different sorption based systems.
Databáze: OpenAIRE
Externí odkaz: