Icing control model and algorithm for wasteheat exchangers of ventilation systems

Аndrew Arbatskiy,Vasiliy Glasov,Аndrew Garyaev

doi:10.1051/matecconf/201819401004

Abstract

Currently, ice control on various heat exchangers to be used for waste heat recovery of discharge air is a rather topical subject because ice building is a factor to reduce efficiency of heat recovery. In such systems, icing always takes place on the side of humid discharge air, with a background of heat exchange between inlet air at temperatures of -30°C and below, and discharge air. To effectively prevent this, it is required to find solutions to problems as follows: study a mechanism of ice building on heat exchange surfaces when interacting with humid air; determine engineering methods to prevent icing, for each type of heat-exchange apparatus, and check efficiency of their operation; develop a mathematical model of ice growth on heat exchange surfaces to enable to vary key parameters (both geometrical and algorithmical ones), determined beforehand, and engineering means aimed at icing prevention.

Highlights

These issues were raised in the paper [1]
Within the framework of this paper, one: - developed a generalized mathematical model to control icing on a heat exchanger on the warm side of a heat recovery system with an intermediate heat carrier; - proposed an engineering concept to regulate mode parameters of a heat exchanger to provide for its maximum efficiency at any point of time; - determined, at a first approximation, an algorithm of improvement of intermediate heat carrier parameters, at various parameters of heating and heated media
This type of waste heat exchangers is notable for the lowest thermal effectiveness among other methods to save energy ressources in ventilation systems

Summary

Introduction

These issues were raised in the paper [1]. Within the framework of this paper, one: - developed a generalized mathematical model to control icing on a heat exchanger on the warm side of a heat recovery system with an intermediate heat carrier; - proposed an engineering concept to regulate mode parameters of a heat exchanger to provide for its maximum efficiency at any point of time; - determined, at a first approximation, an algorithm of improvement of intermediate heat carrier parameters, at various parameters of heating and heated media.

Generalized mathematical model to control icing on a heat exchanger

IHC parameters optimization