In this study, computational fluid dynamics (CFD) models are used to evaluate how ceiling height affects the overall performance of the air distribution system within a data center environment. First, an underfloor air delivery system is examined while keeping all operational parameters constant and

Contamination sources and prevention is a topic that all facility planners and designers must consider in the data processing environment. Contaminants can be grouped into one of three categories: gaseous, solids (particulates) and liquids. Although very small and at times not easily seen without the aid of magnifying lenses or laboratory analysis, contamination can have a disastrous impact on equipment reliability and availability. Information technology (IT) equipment

This paper summarizes a laboratory investigation into the effects that range top diversity, range accessories (including shelving and a salamander) and hood dimensions (including hood height and depth and reservoir volume) have on hood performance with respect to the minimum exhaust rate required for complete capture and containment of cooking effluent. The appliances used for the study include a six-burner gas range, a gas salamander, an underfired gas broiler, a twovat

This paper summarizes the primary results from ASHRAE Research Project RP-1202, a laboratory investigation into the effects that appliance diversity and position have on exhaust hood performance. The objective was to quantify the impact that appliance position and diversity, side panels and front overhang had on the minimum exhaust rate required to provide capture and containment. The appliances included a gas broiler in the heavy-duty category, a two-vat gas fryer in the medium-duty category and an electric full-size convection oven in the light-duty category.

Prior to 2005, there was not a recognized test method in the United States for determining the grease removal efficiency of mechanical filters used in kitchen ventilation systems. It wasnt uncommon for manufacturers to claim 90% grease removal efficiencies or higher based on test results that simulated conditions not representative of commercial kitchens. It has only been in the last few years that data on the true character of grease emissions from common kitchen applianceshave been available.

The Iowa Association of Municipal Utilities (IAMU) office and training headquarters is a pioneering building designed in 1997 that helped define and embody high-performance sustainable design on a speculative office building budget.This project was selected by the American Institute of Architects National Committee on the Environment as one of its Top Ten Green Projects in the United States in 2002.For this 12,500 ft2 (1,161 m2) office and training facility, effective interior daylighting became a main organizing element for the architectural concept.

In line with the mission of the National Park Service, the Zion National Park Visitor Center was designed to use 70% less energy than a comparable visitor center built to Federal Energy Code 10 CFR 435 (DOE 1995). The authors and NPS staff used an integrated design process, including extensive simulations, to minimize the energy consumption. The result was a passive solar commercial building that has a good thermal envelope, daylighting and natural ventilation. Passive

This paper provides an overview of the performance of a low-energy naturally ventilated building and an explanation of special methods required to assess it. Through monitoring, measuring and observing a naturally ventilated office building in a temperate climate, we now have a better understanding and can better assess the energy, ventilation, thermal and overall building performance and evaluation methods that are unique to naturally ventilated office buildings.

The Adam Joseph Lewis Center for Environmental Studies in Oberlin, Ohio, is a 13,600 ft2 (1,263 m2) academic building designed with a long-term goal of operating as a net energy exporter. The building was designed to consume significantly less energy than a typical building.
Features to achieve the energy savings include daylighting, enhanced thermal envelope, ground-source heat pumps, energy recovery ventilators, a dimming lighting system and natural ventilation. The building is equipped with a 60 kW photovoltaic array.

This paper describes the second step toward development of an affordable net zero energy house as part of the Department of Energy’s Building Technology Program. Building affordable houses that generate as much energy as they use is the long-term goal of