This study has demonstrated that the microperforated duct is highly qualified if moderate requirements for the ventilation features and high standards for the absorption characteristic are concerned.In addition, the microperforated ducts allows for draft free ventilation concepts along with a reduction of the sound level of interior noise sources . Experimental evidence is provided in that study.

In this study, CFD models are used to test the performance of alternate design strategies as applied to a single data space. Specifically, a shell space is taken through a design process that leads to two separate designs for data center cooling one using overhead supply air distribution, the other using an underfloor supply air plenum. Then, using methods developed by Sharma, Bash, and Chandrakant (Dimensionless Parameters for Evaluation of Thermal Design and Performance of

The annual costs of energy and maintenance in running a heating, ventilating, and air-conditioning (HVAC) system and life-cycle costs (LCC) of investments for improving air quality in an office building were compared with the resulting revenues from increased office productivity as a consequence of

This paper presents recent findings on the impact of temperature and ventilation on call-handling performance and selected sick building syndrome symptoms of call center operators near thermal neutral conditions. The blind intervention study was conducted in two call centers in the Tropics

Indoor temperature is one of the fundamental characteristics of the indoor environment. It can be controlled with a degree of accuracy dependent on the building and its HVAC system. The purpose of this study was to evaluate the potential benefits of improved temperature control and apply the information to a cost-benefit analysis. The indoor temperature affects several human responses, including thermal comfort, perceived air quality, symptoms of sick building syndrome, and performance at work. In this study, we focused on the effects of temperature on performance at work.

A deteriorated indoor climate is commonly related to increases in sick building syndrome (SBS) symptoms, respiratory illnesses, sick leave, reduced comfort, and losses in productivity. The cost of this for society is high. Some calculations show that the cost is higher than the heating energy

The objective of this paper is to demonstrate the value of using performance-based design techniques in the design of atrium smoke management systems. This approach can reduceproposed smoke exhaust flow rates frequently by more than a factor of two of the initial code-calculated values. The reduction in exhaust flow rates can save money in terms of reducingthe size of the fans and related emergency power systems. The reduction in exhaust flow rates leads to a reduction in makeup air quantities.

This paper describes the CFD analysis of the atrium smoke control system at the Newseum. The Newseum is a museum dedicated to news, and its new building will become a major attraction in Washington, DC. The building code allows an atrium to be open to the rest of the building only at
three levels. The architectural concept of the Newseum is that six levels of the atrium plus the basement are open to the rest of the Newseum space. The CFD analysis showed that this

Several approaches to estimate the cost of installing and operating a photocatalytic oxidation (PCO) device for application in various treatment concerns are presented. First, a simplified approach for estimating the cost of a PCO device using laboratory data is presented in some detail. Second, the

The results of a literature survey and an engineering analysis are presented that evaluate the process, technical, and sizing considerations of photocatalytic oxidation (PCO) as a commercial technology to treat (i.e., remove) low-level contaminants in feed streams of air. PCO uses the energy of photons from light sources to activate a catalyst.