EXERGETIC AND ENERGETIC TRANSIENT PROCESSES IN BUILDINGS

Abstract

Purpose. Application of energy and exergy approaches for the study of dynamic processes in buildings.

Methodology. Using a grid model of a typical apartment of modern buildings to study the impact of the heating system on the accumulation of energy and exergy by the building envelope as a complex system "heat source – man – building envelope", based on a dynamic energy model of the apartment created in the Matlab software environment.

Findings. According to the results of numerical simulations, the temperature distribution in the apartment was analyzed depending on the number and location of temperature control sensors in the rooms of the heating system (ON/OFF controller). Based on the data obtained, the installation of temperature sensors in the apartment used to set up the automation system of the boiler of the autonomous heating system was justified. The estimation of exergy flows accumulated in different elements of the enclosures for different exergy reference points was carried out.

Originality. The choice of the exergy reference point for estimating the flows of exergy lost and accumulated in different elements of the enclosures is substantiated, which allows a better assessment of exergy fluctuations in the enclosures. Also, determined the difference in energy consumption for heating at different combinations of installation of temperature sensors in the rooms on which the controller of the boiler of the autonomous heating system operates.

Practical value. The results of the research prove to determine the feasibility of using dynamic energy modeling of buildings to assess the temperature state of the apartment zones and the heat-accumulating properties of the building envelope. The conducted research allows to substantiate and correctly adjust the operation of the heating system.