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© 2002,
Architectural Energy Corporation.
All Rights Reserved.
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 Funded
by California Energy Commission's Public Interest Energy
Research (PIER) Program
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P1. Demand-Controlled Ventilation
Assessment > Approach
Objectives:
- Assess the potential for energy and cost
savings associated
with the application
of
CO2-based demand
controlled ventilation
(DCV)
strategies in California
for small commercial
and institutional
buildings.
- Identify key drivers determining the cost-effectiveness
of DCV, such as
micro-climates
and utility
rates.
- Provide design requirements and guidance
to deploy DCV strategies.
Approach:
The project plan
included:
- Review the state-of-art for DCV technology
and applications.
- Collect DVC data from twelve demonstration
sites. Similar buildings were to be used for side-by-side comparisons of demand-controlled and fixed minimum ventilation strategies. Each site would have one or two packaged HVAC units.
- Perform DCV energy simulations. These included a number of occupancy types and climate zones to evaluate
energy costs for alternative ventilation strategies.
- Perform detailed simulations of indoor air-contaminant
concentrations
for specific test sites.
- Verify the simulation results with the field data.
- Estimate cooling and heating energy impacts of DCV in occupancy types and
climate zones that did not have demonstration sites.
- Prepare design requirements and guidance
for DCV applications with the results of
the simulations and field studies. The best combinations for indoor air quality
and economizer strategies were to be identified,
and changes to incorporate DCV design requirements
and guidance in ASHRAE Standard 62 were to
be suggested.
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