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Title: Methods and apparatus for measuring the tightness of enclosures

Abstract

Disclosed are methods and apparatus for measuring tightness of an enclosure such as a building by utilizing alternating pressurization techniques. One method comprises providing apparatus capable of causing an internal volume change for the enclosure, the apparatus including a means for determining the instantaneous volume change, and a means for determining the instantaneous pressure within the enclosure. The apparatus is operated within the enclosure to change the volume thereof, and at least one of the frequency and the displacement is adjusted to achieve a root mean square pressure in the enclosure approximately equal to a reference pressure. At that pressure, the leakage of the enclosure is determined from the instantaneous displacement and instantaneous pressure values.

Inventors:
 [1];  [2]
  1. (3815 Brighton Ave., Oakland, CA 94602)
  2. (461 Hudson St., Oakland, CA 94618)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
Sponsoring Org.:
USDOE
OSTI Identifier:
866107
Patent Number(s):
US 4635469
Assignee:
Modera, Mark P. (3815 Brighton Ave., Oakland, CA 94602);Sherman, Max H. (461 Hudson St., Oakland, CA 94618) LBNL
DOE Contract Number:
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
methods; apparatus; measuring; tightness; enclosures; disclosed; enclosure; building; utilizing; alternating; pressurization; techniques; method; comprises; providing; capable; causing; internal; volume; change; including; means; determining; instantaneous; pressure; operated; frequency; displacement; adjusted; achieve; root; mean; square; approximately; equal; reference; leakage; determined; values; internal volume; comprises providing; approximately equal; method comprises; apparatus including; apparatus capable; pressure value; method comprise; root mean; mean square; pressure values; utilizing alternating; /73/

Citation Formats

Modera, Mark P., and Sherman, Max H.. Methods and apparatus for measuring the tightness of enclosures. United States: N. p., 1987. Web.
Modera, Mark P., & Sherman, Max H.. Methods and apparatus for measuring the tightness of enclosures. United States.
Modera, Mark P., and Sherman, Max H.. Tue . "Methods and apparatus for measuring the tightness of enclosures". United States. doi:. https://www.osti.gov/servlets/purl/866107.
@article{osti_866107,
title = {Methods and apparatus for measuring the tightness of enclosures},
author = {Modera, Mark P. and Sherman, Max H.},
abstractNote = {Disclosed are methods and apparatus for measuring tightness of an enclosure such as a building by utilizing alternating pressurization techniques. One method comprises providing apparatus capable of causing an internal volume change for the enclosure, the apparatus including a means for determining the instantaneous volume change, and a means for determining the instantaneous pressure within the enclosure. The apparatus is operated within the enclosure to change the volume thereof, and at least one of the frequency and the displacement is adjusted to achieve a root mean square pressure in the enclosure approximately equal to a reference pressure. At that pressure, the leakage of the enclosure is determined from the instantaneous displacement and instantaneous pressure values.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 13 00:00:00 EST 1987},
month = {Tue Jan 13 00:00:00 EST 1987}
}

Patent:

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  • Disclosed are methods and apparatus for measuring tightness of an enclosure such as a building by utilizing alternating pressurization techniques. One method comprises providing apparatus capable of causing an internal volume change for the enclosure, the apparatus including a means for determining the instantaneous volume change, and a means for determining the instantaneous pressure within the enclosure. The apparatus is operated within the enclosure to change the volume thereof, and at least one of the frequency and the displacement is adjusted to achieve a root mean square pressure in the enclosure approximately equal to a reference pressure. At that pressure,more » the leakage of the enclosure is determined from the instantaneous displacement and instantaneous pressure values. 3 figs.« less
  • Elongation measurement apparatuses and systems comprise at least two Linear Variable Differential Transformers (LVDTs) with a push rod coupled to each of the at least two LVDTs at one longitudinal end thereof. At least one push rod extends to a base and is coupled thereto at an opposing longitudinal end, and at least one other push rod extends to a location spaced apart from the base and is configured to receive a sample between an opposing longitudinal end of the at least one other push rod and the base. Nuclear reactors comprising such apparatuses and systems and methods of measuringmore » elongation of a material are also disclosed.« less