Now showing items 1-20 of 1004

    • An Overview of Proportional plus Integral plus Derivative Control and Suggestions for Its Successful Application and Implementation 

      Sellers, D. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      PID control loops are becoming quite common in the commercial, institutional, and industrial HVAC industry. Proper application and tuning of this control algorithm can bring many efficiency and performance benefits with ...
    • State of the Art Energy Submetering at Texas Department of Criminal Justice Industries 

      Bryant, J. A.; McBride, J.; Merka, T. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      The Texas Department of Criminal Justice Utilities and Energy Department (TDCJ-U&E) has completed the first phase of a detailed energy use submetering system that will be one of the largest such installations in the United ...
    • Commissioning to Meet Space Qualification Criteria vs. Energy Consumption Optimization Focused Commissioning 

      Sellers, D.; Irvine, L. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      In many cases, the commissioning process is driven by space quality criteria rather than by energy consumption and optimization criteria. This is especially true for the HVAC systems serving clean rooms in the semi-conductor ...
    • Technology Enablers for Next-Generation Economic Building Monitoring Systems 

      Sweeney, J., Jr.; Culp, C. (Texas A&M University (http://www.tamu.edu)Energy Systems Laboratory (http://esl.tamu.edu), 2001)
      The measurement of a building's electrical and thermal consumption provides the necessary data used to increase energy efficiency. Measurements typically range from hourly to monthly. Monthly data can be used to ...
    • Retrocommissioning's Greatest Hits 

      Haasl, T.; Potter, A.; Irvine, L. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      It is possible to save thousands of dollars in energy costs through a few low-cost operational adjustments but those opportunities are often hidden. Retrocommissioning is a systematic investigation process for improving ...
    • Using Utility Bills and Average Daily Energy Consumption to Target Commissioning Efforts and Track Building Performance 

      Sellers, D. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      This paper discusses using basic utility data that is readily available from utility bills to focus targeted retrocommissioning efforts. It also discusses how to use this information to spot emerging problems related to ...
    • Laboratory Air Handling Unit System 

      Cui, Y.; Liu, M. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      An innovative AHU system is presented in this paper. The proposed AHU system is called a Laboratory Air Handling Unit (LAHU) system since it is most suitable for the buildings where one section (laboratory) has 100% exhaust ...
    • Evaluation of Emerging Diagnostic Tools for Commercial HVAC Systems 

      Friedman, H.; Piette, M. A. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      This paper compares and evaluates the capabilities of six emerging diagnostic tools for commercial HVAC systems. We present a brief description of the diagnostic tools, and then focus on evaluating the features of the ...
    • Demand Relief and Weather Sensitivity in Large California Commercial Office Buildings 

      Kinney, S.; Piette, M. A.; Gu, L.; Haves, P. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      A great deal of research has examined the weather sensitivity of energy consumption in commercial buildings; however, the recent power crisis in California has given greater importance to peak demand. Several new ...
    • Performance Analysis of Dual-Fan, Dual-Duct Constant Volume Air-Handling Units 

      Joo, I. S.; Liu, M. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      Dual-fan, dual-duct air-handling units introduce outside air directly into the cooling duct and use two variable speed devices to independently maintain the static pressure of the hot and the cold air ducts. Analytical ...
    • Energy Management Program at Atlanta Postal Service Distribution Center 

      Brown, M.; Ansari, A. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      The US Postal Service operates more than 38,000 post offices across the country and spends $350 million annually on utilities (1). Driven by President Clinton's 1999 Executive Order that mandates a 35 percent reduction in ...
    • Monitoring and Verification Procedures Used in the Texas LoanSTAR and Rebuild America Programs 

      Farouz, S.; Baltazar-Cervantes, J. C.; Haberl, J. S.; Claridge, D. E. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      The monitoring and verification procedures that have been developed for the Texas LoanSTAR program and the ESL's Rebuild America Program have become a foundation for a number of other state and federal M&V programs, including ...
    • Accounting for the Occupancy Variable in Inverse Building Energy Baselining Models 

      Claridge, D. E. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      The occupancy factor is often underestimated in inverse modeling of building energy use, or accounted for by grouping the daily data in occupied and unoccupied groups which are modeled separately. For instance, in institutional ...
    • Cromer Cycle Air Conditioner: A Study to Confirm Target Performance 

      Cromer, C. J. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      The Cromer cycle uses a desiccant wheel operating in conjunction with a typical air conditioning system. Simulations and laboratory prototypes demonstrate that the cycle has the potential for enhanced humidity control with ...
    • ASHRAE's Proposed Guideline 14P for Measurement of Energy and Demand Savings: How to Determine What Was Really Saved by the Retrofit 

      Haberl, J. S.; Reeves, G.; Gillespie, K.; Claridge, D. E.; Cowan, J.; Culp, C.; Frazell, W.; Heinemeier, K.; Kromer, S.; Kummer, J.; Mazzucchi, R.; Reddy, A.; Schiller, S.; Sud, I.; Wolpert, J.; Wutka, T. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      ASHRAE has recently completed the development of Guideline 14 to fill a need for a standard set of energy (and demand) savings calculation procedures. Guideline 14 is intended to be a guideline that provides a minimum ...
    • Stipulations in Performance Contracting M&V: the Good, the Bad, and the Ugly 

      Stetz, M.; Webster, L.; Bradford, J. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      Performance contractors (PC) often use stipulations for part or all of their measurement & verification (M&V) efforts. The value of stipulations are low cost and easy implementation (good). Disadvantages include uncertain savings ...
    • Coordinated Control of HVAC Systems 

      Federspiel, C.; Lanning, S. D.; Li, H.; Auslander, D. M. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      This paper describes the development of new control logic for starting and stopping energy-intensive equipment in buildings such as staged air-conditioning units. The concept is to use pulse-width modulation (PWM) instead ...
    • Case Studies of Commissioning HVAC Systems 

      Browning, B. K. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      This paper discusses problems found during third party commissioning of projects where humidity control was an indicator of significant problems. Project 1 was an 8000 square foot library. Problems found included air ...
    • Obtaining and Ensuring Persistence of O&M Savings Through Resource Conservation Management 

      Miller, W. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      Resource conservation management is a management program similar to financial management in that its success requires commitment by all levels of the organization to the process as well as an accounting procedure and ...
    • Measured Energy Use Indices for 27 Office Buildings 

      Haberl, J. S.; Sreshthaputra, A.; Claridge, D. E.; Turner, W. D.; Harmon, K.; Kisselburgh, J.; Mase, R. (Energy Systems Laboratory (http://esl.tamu.edu)Texas A&M University (http://www.tamu.edu), 2001)
      Energy use indices for 27 government office buildings are presented that have been assembled from hourly monitored data as part of the Texas LoanSTAR program and other efforts at the Energy Systems Laboratory. These indices ...