ANALYSIS OF THERMAL EFFICIENCY OF ENERGY-ACTIVE WINDOW UNITS FOR PASSIVE HOUSES BASED ON THE ЖОВАННИ BIOCLIMATIC DIAGRAM UDC 620.98

Abstract

This article analyzes the thermal efficiency of energy-active window units (EAWUs) for passive houses under the climatic conditions of Tashkent city (6th climatic zone of Uzbekistan) based on the Giovanni bioclimatic diagram. The study focuses on the role of window units in ensuring passive heating through solar energy utilization during the winter season. Calculations were performed for four types of EAWU (standard multilayer, partially shaded, air-circulating, and their combination) based on their thermal conductivity (U) and solar transmittance (g) coefficients. The results indicate that air-circulating EAWU reduce heating energy consumption by 30–40% in winter, providing the highest efficiency, while shaded windows decrease the effectiveness of passive heating. The research relies on computational and experimental data obtained from an experimental facility in Tashkent.

The research employed analytical calculations, experimental measurements, and comparative analysis methods. The materials included an experimental facility in Tashkent and four types of EAWU. Using these methods and materials, the passive heating efficiency of EAWUs in Tashkent’s climate was determined, with air-circulating EAWU identified as the most optimal option..

According to the research findings, in the energy balance of energy-active window units (EAWUs), the air-circulating type exhibited the lowest energy consumption for heating, standard windows showed average performance, partially shaded air-circulating units had slightly higher energy demands, and shaded windows required the highest energy input.

The study concludes that the selection of EAWUs is critical for energy conservation. In Tashkent’s conditions, air-circulating window units were proven to be the most effective for passive houses.