Verification and validation of a CFD model of a fixed regenerator for heat recovery from air

Abstract

The article presents verification and validation of a numerical model of conjugated heat and mass transfer processes and aerodynamics in a fixed "honeycomb" type regenerator with square channels for heat recovery from the exhaust air of a local ventilation system. The processes in the regenerator are simulated by the CFD method. The influence of the processes of condensation and evaporation of moisture in the humid air on the efficiency of the regenerator has been investigated through these simulations and is shown in the article. The calculations of the fixed regenerator's thermal efficiency and pressure losses are made by known analytical models and the results are compared with those of the numerical model. The article compares the model simulation results with experimental data and data from reference sources.

Analysis of the factorial and consequential variables in the energy efficiency study of a heat pump unit with a radiant evaporator

“…A multifactorial analysis of the dependence between the factor and consequential variables was made in the study of the effectiveness of heat pump unit with a radiant evaporator. The experimental set-up and organization are well described in [9] and simulation study as well as partial application are presented in [10] and [11]. The following 8 figures (fig.…”

Simple improvements for decentralized air handling unit for regenerative heat recovery

“…A parametric analysis of the factors affecting the efficiency of such devices is presented in [3,4]. For the current optimization, a multi-parameter mathematical model of a regenerator with periodic action was used, taking into account the mutual influence of all essential factors on the functional characteristics of the regenerator, presented in the article [5]. The model reflects the possibility of condensation of water vapour in the flow in the channels of the regenerator matrix but does not consider the formation of fog in the airflow.…”

“…A model evaluating the unbalance of the warm and cold airflow through the AHU caused by the conditions of its operation is also used and analyzed using a CFD model presented in the article [6]. Combining the process models in the 1234 (2023) 012010 IOP Publishing doi:10.1088/1755-1315/1234/1/012010 2 regenerator [5] and the working environment [6] allows for a more complex, systematic approach to improve the functioning of the decentralized ventilation device under near-operating conditions.…”