rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Performance of ECM controlled VAV fan powered terminal units
  name:
    name part: Cramlet, Andrew.
    role:
      role term: creator
  name:
    name part: O'Neal, Dennis L.
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2010
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: remote
    extent: 1 online resource.
  abstract: Empirical performance models of fan airflow, primary airflow and power consumption were developed for series and parallel variable air volume fan powered terminal units. An experimental setup and test procedure were created to test the terminal units at typical design pressures and airflows. Each terminal unit observed in this study used an 8 in (20.3 cm) primary air inlet. Two fan motor control methods were considered. The primary control of interest was the electronically commutated motor (ECM) controller. Data collected were compared with previous research regarding silicon rectified control (SCR) units. Generalized models were developed for both series and parallel terminal units. Coefficients for performance models were then compared with comparable SCR controlled units. Non-linear statistical modeling was performed using SPSS software (2008). In addition to airflow and power consumption modeling, power quality was also quantified. Relationships between real power (watts) and apparent power (VA) were presented as well as harmonic frequencies and total harmonic distortion. Power quality was recorded for each ECM controlled terminal unit tested. Additional tests were also made to SCR controlled terminal units used in previous research (Furr 2006). The airflow and power consumption performance models had an R² equal to 0.990 or greater for every terminal unit tested. An air leakage model was employed to account for leakage in the parallel designed VAV terminal units when the internal fan was turned off. For the leakage model, both ECM and SCR controlled units achieved an R² greater than or equal to 0.918.
  note: by Andrew Cramlet.
  note: "Major Subject: Mechanical Engineering"
  note: Title from author supplied metadata (automated record created 2010-03-12 12:08:51).
  note: Electronic resource.
  note: Master of Science Texas A&M University 2008 http://hdl.handle.net/1969.1/ETD-TAMU-3000
  note: Includes bibliographical references.
  note: Text (Thesis)
  subject:
    topic: Major mechanical engineering
  subject:
    topic: Powered
  subject:
    topic: VAV
  subject:
    topic: ECM
  subject:
    topic: FPTU
  subject:
    topic: Unit
  subject:
    topic: Fan
  subject:
    topic: Terminal
  identifier: http://hdl.handle.net/1969.1/ETD-TAMU-3000
  record info:
    record content source: TXA
    record creation date: 100429
    record change date: 20151201150203.0
    record identifier: in00002595684