Energy Saving Analysis on Application of Condensing Heat Recovery to Constant Temperature/Humidity System

Abstract

This study aims to investigate energy saving efficiency of condensing heat recovery device installed in constant temperature/humidity system. In the experiment, heat tank (heat exchanger) firstly stores condensing heat, which replaces the role of electric reheating method in traditional constant temperature/humidity system. And then the study discusses the effect of reheating methods, electric heating and heat recovery, on temperature, relative humidity, and electricity consumption in the constant temperature/humidity system. The experimental result shows that the heat recovery device exerts better control on temperature and relative humidity under differential room loads. And by providing additional power dissipation for the water pump and the fan only, it meets the requirement of reheat supply. As a result, overall power consumption of the constant temperature/humidity system reduces by 22.5-38.2%. This study uses the reheat recycled through condensing heat recovery and supplied to the constant temperature/humidity air-conditioning equipment, and indeed reduces electricity consumption of the overall constant temperature/humidity system and maintains a stable temperature and humidity environment.