Modern buildings’ environmental impacts threaten global environmental health. Population growth and increased access to and use of current building technology are not sustainable. People are often not in control of their building environments and, as a re
Comprehensive field studies in different parts of the world have documented that highpercentages of occupants in many offices and similar buildings find the indoor air quality(IAQ) unacceptable and suffer from SBS symptoms. This occurs even though existingventilation standards and guidelines are met and even though measured concentrations ofpollutants in the air are way below any limits or guideline values. A series of recentindependent studies has documented that mediocre IAQ also has a negative impact on theproductivity of office workers.
Twenty five cellular offices in the Wilkinson Building at the University of Sydney, Australia are ventilated through operable windows and doors and have been retrofitted with a supplementary reverse cycle cooling/heating system with an occupant controlled fancoil unit in each room. Energy consumption and occupancy and temperature status of rooms have been monitored since the system was commissioned at the end of 1997.
The objective of the BRITA in PuBS proposal on Ecobuildings is an increasing of the market penetration of innovative and effective retrofit solutions to improve energy efficiency and implement renewables, with moderate additional costs.
With the application of part L2 of the Building Regulations in the UK, new buildings with excessive air leakage have no longer been acceptable. All new commercial and public building over 1000 m2 must be tested for airtightness. An air permeability formula measures the envelope of walls, roof and ground floor area. This paper explains why bother about air leakage, and what desginers and constructors must do, and how the testing for airtightness should be carried out. The essential message is : build tight - ventilate right.
The aim of that study was to demonstrate the potential to design buildings that can simultaneously improve indoor environmental quality along with a reduction of energy. In that order 4 energy-efficient relocatable classrooms were designed and constructed, each equipped with two different HVAC systems (heat-pump air-conditioning system and an energy-efficient indirect/direct evaporative cooler). Results are presented.
In the 1970's variable-air-volume (VAV) revolutionized the use of air-conditioning for commercial buildings. Now a new revolution is underway with the ductless VAV systems.This article describes the two main types of ductless VAV systems (underfloor and overhead) and explore their benefits such as easier design, lower energy consumption, reduced building-faade costs, improved air quality.
Buildings leak water and air : it is normal and impossible to avoid. So the architect and HVAC engineer's goal should be to recognize the concept of building air leakage and account for it in :- quantifying leakage- reducing it if excessive- controlling leakage by managing air pressures with the HVAC system.The aim of this article is to discuss the methods for measuring and expressing leakage and to report the results of a cas study, San Carlos Park elementary school in Fort Myers, Florida.
The objective of the annex 34 was to develop HVAC fault detection and diagnosis tools, which are closed to commercial products. The approach was to design a number of different computer based demonstration systems that could be interfaced to HVAC processes in buildings. By monitoring the operation of these demonstration systems, researchers were able to test a variety of fault detection and diagnosis methods and technique in a real environment, find possible shortcomings and obtain new ideas for further development.
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