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Our work deals with creating information assistance for commissioning (Cx) low-energy buildings throughout their life-cycle. We call this Embedded Commissioning in reference to the integration of persistent and reliable Cx information. We have developed digital models of the Cx process and products. Currently, we are testing system inspection and functional performance ....

By A. Akcamete,J. Garrett,B. Akinci,O. Akin,K. J. Lee--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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The Continuous Commissioning Leading Project (CCLEP) process is an ongoing process to apply Continuous Commissioning (CC) system optimization theory and advanced technologies in commercial retrofit projects. The CCLEP process was applied to a luxury shopping mall and office building from May 2006 to February 2007. The CCLEP process integrates the Air-Handling Unit (AHU)....

By L. Wu,X. Pang,M. Liu,J. Wang,T. G. Lewis--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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Natural ventilation airflow rate is generally calculated using indoor and outdoor temperature difference without consideration of thermal interaction between the ventilated air and the room in simple analytical method based on pressure balance. However, room air temperature is influenced by natural ventilation airflow rate, and airflow rate is influenced by room air tem....

By S. Pan,M. Zheng,H. Yoshida--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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The “New House of the Region of Hannover“ is the first building in Germany that has been built according to the Standard „EnOB - Energieoptimiertes Bauen“ („Energy optimized building“) as defined by the German Ministry of Economics and Technology within a Public Private Partnership. This paper - elaborated in a research project on commissioning, operation a....

By S. Plesser,M. N. Fisch--Texas A&M University (http://www.tamu.edu):Energy Systems Laboratory (http://esl.tamu.edu)--2007-12-01
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Commissioning (Cx) consists in specifying building system performance requirements set by the owner, auditing different judgments and actions performed by the Cx related parties in order to achieve the performance, writing necessary and sufficient documentation, and verifying that the system enables proper operation and maintenance through functional performance testing....

By N. Couillaud,M. Jandon,B. Viaud,B. Clemoncon--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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This article investigates the potentials of energy-saving and mitigation of green-house gas (GHG) emission offered by implementation of building energy efficiency policies in China. An overview of existing literature regarding long-term energy demand and CO2 emission forecast scenarios is presented, it is found that the building sector will account for about one third o....

By J. Li--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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Recently Texas Legislature required adding 5,880 MW of generating capacity from renewable energy technologies by 2015, and 500 MW from non-wind renewables. This legislation also required the Public Utility Commission (PUC) to establish a target of 10,000 MW of installed renewable capacity by 2025, and required Texas Commission on Environmental Quality (TCEQ) to develop....

By J. C. Baltazar-Cervantes,B. Yazdani,C. Culp,K. Subbarao,Z. Liu,J. S. Haber--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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Four areas in Texas, involving 16 counties, have been designated by the United States Environmental Protection Agency (EPA) as non-attainment areas because ozone levels exceed the National Ambient Air Quality Standard (NAAQS) maximum allowable limits. These areas face severe sanctions if attainment is not reached by 2009. Four additional areas in the state, involving 25....

By J. C. Baltazar,J. S. Haberl,C. Culp,B. Yazdani,D. Gilman--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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Enthalpy economizer can theoretically save more energy than temperature based economizer. However, the requirement of outdoor air humidity measurement in the traditional enthalpy economizer control made it impossible. A novel control sequence using mixed air enthalpy is developed in the paper. Both theoretical and experimental investigation shows that humidity measureme....

By J. Feng,M. Liu,W. Pang--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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Since terminal boxes do not have a modulation damper in constant volume (CV) air handling unit (AHU) systems, zone reheat coils have to be modulated to maintain the space temperature with constant supply airflow. This conventional control sequence causes a significant amount of reheat and constant fan power under partial load conditions. Variable Frequency Drives (VFDs)....

By Y. Cho,G. Wang,M. Liu--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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Most air handling units (AHUs) in commercial buildings have an air economizer cycle for free cooling under certain outside air conditions. During the economizer cycle, the outside air and return air dampers are modulated to seek mixing air temperature at supply air temperature setpoint. Mechanical cooling is always required when outside air temperature is higher than th....

By G. Wang,Z. Wang,K. Xu,M Liu--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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As for a variable air volume (VAV) system, the air duct static pressure is a typical control variable maintained by modulating supply fan speed. The static pressure equals to the summation of the duct pressure loss downstream of the sensor to the terminal box and box inlet static pressure. Typically, the air duct static pressure is set as a constant set point based on t....

By M. Liu,J. Feng,Z. Wang,L. Wu,K. Zheng,W. Pang--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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