Avaliação da influência do microclima urbano em projeto de climatização no município do Rio de Janeiro

Abstract

The urban areas are characterized for different microclimates identified for the high concentration of buildings, which causes the formation of islands of heat, an increase of the temperature of the air compared to the areas of low occupation or rural areas. The heating, ventilation and air-conditioning (HVAC) projects require the calculation of thermal load, which is based on the information of the environmental conditions of the external air, provided through the standard: Air Conditioning Installations - Central and Unit Systems (ABNT NBR 16401) or through the meteorological database meetings in the software for air conditioning design. The objective of this work is to investigate the influence of urban microclimate on the design of the air conditioning system through the use of climatic data from the closest meteorological station. The processing of the meteorological data followed the recommendations of the American Society of Heating, Refrigeration and Air-Conditioning (ASHRAE) to create of the typical days of project. The simulation of the air conditioning project used the same constructions at different points of Rio de Janeiro through the commercial software HAP, version 4.9.1, from Carrier. The results showed that the thermal loads of cooling for air conditioning projects for the city of Rio de Janeiro can go through an increase without scale of up to 20% when are using the meteorological data from Antônio Carlos Jobim and Santos Dumont Airports.