A simple method to estimate the urban heat island intensity in data sets used for the simulation of the thermal behaviour of buildings
Wienert, Uwe; Kreienkamp, Frank; Spekat, Arne; Enke, Wolfgang
Test Reference Years (TRY) are data sets tailored for use in the context of simulations with respect to the thermal behaviour of buildings. They are based on measurements and observations from weather stations of the German Meteorological Service (Deutscher Wetterdienst, DWD) and represent the climate conditions of a larger area with an order of magnitude of 100 km x 100 km. The data sets cannot, however, be readily applied to urban areas. The air temperature as one of the most important meteorological elements for the building-related simulations frequently is subject to an increase with respect to the conditions outside the city area due to what is called the urban heat island effect. Numerous field measurements have led to the development of empirical relations to assess the urban temperature modification. These relations were implemented in a straightforward method. It applies a set of easily accessible parameters in a combination of different empirical formulae to derive an estimate of the urban air temperature modification. An intercomparison of calculated versus measured air temperature data showed that this method might yield a realistic representation of the urban heat island intensity.