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Now showing items 11-20 of 34
The Persistence of Retro-commissioning Savings in Ten University Buildings
(2012-07-16)
This study evaluated how well energy savings persisted over time in ten university buildings that had undergone retro-commissioning in 1996. The savings achieved immediately following retro-commissioning and in three ...
Thermodynamic Modeling of HVAC Plant Cooling Equipment for Quantification of Energy Savings Through Continuous Commissioning Measures
(2012-02-14)
The Continuous Commissioning (CC) process is applied to existing buildings in order to reduce energy consumption by optimizing HVAC system operation and improving occupant comfort. The CC process consists of implementing ...
An Assessment of Aspergillis Fungi Bypass for a Small Commercial HVAC Unit
(2018-05-08)
Aspergillus is a commonly found fungus in both indoor and outdoor environments. A common, not so harmful fungi for most people, this fungus can lead to aspergillosis in persons with suppressed immunological systems. This ...
Cascaded Control for Improved Building HVAC Performance
(2018-11-16)
As of 2011 buildings consumed 41% of all primary energy in the U.S. and can represent
more than 70% of peak demand on the electrical grid. Usage by this sector has
grown almost 50% since the 1980s and projections foresee ...
Decentralized Model Predictive Control of a Multiple Evaporator HVAC System
(2009-05-15)
Vapor compression cooling systems are the primary method used for
refrigeration and air conditioning, and as such are a major component of household and
commercial building energy consumption. Application of advanced control ...
Small Residence Multizone Modeling with Partial Conditioning for Energy Effieiency in Hot and Humid Climates
(2013-07-30)
The purpose of this study is to reduce the energy cost of the low-income households in the hot and humid climates of the U.S. and thereby to help them afford comfortable homes. In this perspective, a new HVAC energy saving ...
A Quasi-Dynamic HVAC and Building Simulation Methodology
(2012-07-16)
This thesis introduces a quasi-dynamic building simulation methodology which complements existing building simulators by allowing transient models of HVAC (heating, ventilating and air-conditioning) systems to be created ...
Measure Whole-Building HVAC System Energy Efficiency
(2015-07-29)
Usually, the chiller and boiler efficiencies are the primary measures that are considered with respect to building HVAC systems efficiency. However, during operation, several other components consume energy as part of the ...
A Comparison of Fault Detection Methods For a Transcritical Refrigeration System
(2012-10-19)
When released into the atmosphere, traditional refrigerants contribute to climate change several orders of magnitude more than a corresponding amount of carbon dioxide. For that reason, an increasing amount of interest has ...
Dynamic Modeling and Wavelet-Based Multi-Parametric Tuning and Validation for HVAC Systems
(2014-07-10)
Dynamic Heating, Ventilation, and Air-Conditioning (HVAC) system models are used for the purpose of control design, fault detection and diagnosis, system analysis, design and optimization. Therefore, ensuring the accuracy ...