Efficiency of heat recovery unit in D-building

Abstract

The main purpose of this thesis work is to consider how the heat recovery unit in D-building works and to search errors in the system (if any exist) and try to find methods to improve efficiency heat recovery system.

Analysis was performed according with database from automation in D-building. Database contains stored measurements of the temperatures before and after heat recovery unit, supply and exhaust air flows and heat electricity consumption. According this data it is possible to make diagrams and analyze functioning of the heat recovery unit.

Based on data from automation it can be concluded that the reason of malfunctioning of heat recovery unit is incorrect settings of automation system. Fluctuation in the diagram of the annual energy efficiency in the first part of the month the due to incorrect changing speed of the rotation wheel. It is necessary to fix settings to reach right functioning.