HVAC_handout - Environmental Technology I, ARC 3610 Martin...

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Environmental Technology I, ARC 3610 School of Architecture, University of Florida Martin Gold, Assistant Professor 1 Heating Ventilating and Air Conditioning Systems Tutorial Introduction This Tutorial is intended to illustrate and summarize mechanical cooling systems that are commonly used in buildings. The following information is adapted from a Life Cycle Cost study conducted for the Florida Department of Education. The Tutorial outlines various mechanical cooling system types that are used in schools throughout the State of Florida which are representative of the predominant system types used nationally. System descriptions, images, schematic diagrams, first cost estimates, operating cost estimates and qualitative observations are included when applicable. Due to the Florida climate, mechanical cooling is the largest consumer of energy in schools and second only to electrical lighting in some commercial applications subsequently contributing significantly to operating costs. Furthermore, the inherent humidity in the sub-tropical climate and the requirement for adequate fresh air to be delivered to spaces requires sophisticated equipment and strategies of implementation to achieve comfort and good indoor air quality (IAQ). Other factors such as system space requirements; mechanical system noise generated; cooling equipment noise impacting adjacent neighborhoods; rebates from electrical utilities for off-peak cooling; and the deleterious effects of excessive humidity on health, building finishes and equipment such as computers are important considerations that relate to mechanical system selection, design and operation in a hot & humid climate. Additionally, in rural areas, the availability of repair parts and factory trained repair personnel are typically limited and the use of complex systems in these areas may have long down times and increased repair costs. GENERAL DESCRIPTION OF MECHANICAL SYSTEMS AND COMFORT FACTORS Elements that make up mechanical systems range from train car size chillers to sophisticated energy savings devices, from pipe insulation to digital controllers and computerized monitoring systems. This section attempts to appropriately include and discuss these elements and review the types of systems that are typically use in school buildings and other commercial applications in Florida. Table 3.2 below provides a tabulated organization of the many elements that contribute to a complete mechanical Heating Ventilating and Air Conditioning (HVAC) system. In the following sections, specific systems are referred to by a general description and will comprise the elements listed in Table 3-2. In most cases, the systems included below will provide heating, cooling and ventilating with exceptions noted.
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This note was uploaded on 08/27/2011 for the course ARC 3610 taught by Professor Gold during the Spring '08 term at University of Florida.

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HVAC_handout - Environmental Technology I, ARC 3610 Martin...

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