Zaktualizowane obliczeniowe temperatury powietrza zewnętrznego i strefy klimatyczne polski do wyznaczania projektowego obciążenia cieplnego dla ogrzewania budynków

Piotr Grzegorz Narowski

Abstract

The design heat load of building heating systems depend directly on the design temperature of the external air. The choice of design external air temperature is a compromise between the demand for heat to maintain thermal comfort inside the building during the heating season and the investment costs related to the size of the designed heating system. At present, the territory of Poland is divided into five climate zones with assigned external air design temperatures determined about 65 years ago. This article presents modified values of the external air temperatures for space heating design heat load for 61 meteorological stations of Poland determined using the ASHRAE methodology and PN EN ISO 15927-5 standard. The computed values of design external air temperature are presented on the maps of Poland in form of Voronoi cells and isotherms. This article discusses the obtained calculation results.