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    Developing a combined intake and exhaust vent for heat recovery ventilation in cold climates

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    Author
    Bickford, Riley Joseph
    Chair
    Marsik, Tom
    Peterson, Rorik
    Committee
    Dekenberger, David
    Keyword
    Heat recovery
    Buildings
    Heat exchangers
    Environmental engineering
    Climate
    Energy conservation
    Heating and ventilation
    Dwellings
    Design and construction
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/13070
    Abstract
    Heat recovery ventilation systems have become increasingly popular in modern residential buildings, particularly in cold climates. This has led to the research and development of supporting technologies, such as combined intake/exhaust vents. Conventionally, the intake and exhaust airflows of a heat recovery ventilation system use separate vents and penetrations in a building's envelope; combined intake/exhaust vents package these airflows together and use only one penetration. This simplifies heat recovery ventilation system installation and can lead to higher operating efficiencies; the implications are reduced up-front and operating costs as well as broadened access to heat recovery ventilation. Unfortunately, in cold climates, existing combined intake/exhaust vent designs are susceptible to frost accumulation, a mode of failure. The aim of this work was to develop a combined intake/exhaust vent more suitable for cold climate use: the Arctic Dual Hood. The design was developed in iterations informed by experimentation. These experiments included climate chamber evaluations and field performance comparisons. This design process produced a functional prototype with favorable frost mitigation characteristics compared to an existing combined intake/exhaust vent design, as determined through the field performance comparisons. Additionally, this prototype observed the constraints and met the performance requirements imposed by the American Society of Heating, Refrigeration, and Air-Conditioning Engineer's Standard 62.2: Ventilation and Acceptable Indoor Air Quality in Residential Buildings.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 2022
    Table of Contents
    Chapter 1. Introduction -- 1.1 Impetus -- 1.2 Background information -- 1.2.1 Ventilation in cold climates -- 1.2.2 Indoor air quality and health -- 1.2.3 Heat recovery ventilation -- 1.2.4 Combined intake and exhaust vents -- 1.2.5 Frost accumulation -- 1.2.6 Materials and manufacturing techniques -- 1.3 Thesis organization. Chapter 2. Design -- 2.1 Requirements -- 2.2 Scope of Work -- 2.3 Design Methodology -- 2.3.1 Modeling and Simulation -- 2.3.2 Physical Experimentation -- 2.4 General Form of Design -- 2.5 Prototypes -- 2.6 Supporting Components. Chapter 3. Climate chamber evaluations -- 3.1. Introduction -- 3.2. Equipment -- 3.2.1. Climate chamber -- 3.2.2. The climate chamber apparatus -- 3.2.3. Instrumentation and controls -- 3.3. Methods -- 3.4. Results -- 3.5. Discussion and conclusions. Chapter 4. Field performance comparisons -- 4.1. Introduction -- 4.2. Equipment -- 4.2.1. Installation -- 4.2.2. Instrumentation -- 4.3. Methods -- 4.4. Results -- 4.5. Discussion and conclusions. Chapter 5. Contamination evaluation -- 5.1. Introduction -- 5.2. Equipment -- 5.3. Methods -- 5.4. Results -- 5.5. Discussion and conclusions. Chapter 6. Conclusions and recommendations -- 6.1. Conclusions -- 6.2. Recommendations. References -- Appendices.
    Date
    2022-08
    Type
    Thesis
    Collections
    Engineering

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