Discussão e análise crítica da norma ABNT NBR16401-1/2008 : instalações de ar-condicionado - sistemas centrais e unitários parte 1: projetos das instalações

Abstract

Since the beginning of time and improved by every technological advance achieved by mankind, human being seeks to employ the acquired k nowledge to make the environment around itself more comfortable. With bu ildings becoming bigger and bigger and difficult to penetrate the outside air t o promote natural ventilation, and with large glass areas, the use of HVAC systems is practically mandatory. This work presents a discussion and critical analysis of the sandard of the Brazilian Association of Technical Standards (ABNT) NBR 16401-1/2008 "Facilities Air-conditioning - central and unitary systems Part 1: Design of the facilities." In the literature review are presented and highlighted each item that must be ob served in the design of air conditioning systems. The standard is discussed bas ed on the bibliographic reference and publication ASHRAE Handbook – Fundamentals (ASHRAE – American Society of Heating, Refrigerating and Air Conditionng Engineers) which is one of the most important if not the most important world refe rence in the field of heating, ventilation and air conditioning. In the reference notes a concern about the accuracy of the calculation of heat load, and reflects both the reduction of energy consumption in the economy with the execution of work avoiding the waste of resources and equipment. When analyzing the Brazilian standard and bibliogra phy used as a reference, it is evident concern for the correct sizing of the HVAC system, aimed not only the correct and conscious use of energy and resourc es as well as the comfort and welfare of system users. This precision sizing of t he air conditioning is only possible through the use of software in the case of larger s ystem, since the calculation methods have become increasingly refined. The stand ard has evolved in several points as clear benchmarks for air quality, most current c omfort conditions, for example, but needs improvement in areas such as information abou t weather data for more cities.