Browsing Texas A&M Engineering Experiment Station by Title

Now showing items 4085-4104 of 8496

    • Impacts of Optimized Cold & Hot Deck Reset Schedules on Dual Duct VAV Systems - Theory and Model Simulation 
      Liu, M.; Claridge, D. E. (Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu), 1998)
      Optimal hot and cold deck reset schedules can decrease simultaneous heating and cooling in VAV AHUs comparing with constant cold deck temperature operation. In this paper, optimization models are developed. The energy impacts ...
    • Impacts of Soil and Pipe Thermal Conductivity on Performance of Horizontal Pipe in a Ground-source Heat Pump 
      Song, Y.; Yao, Y.; Na, W. (Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu), 2006)
      In this paper the composition and thermal property of soil are discussed. The main factors that impact the soil thermal conductivity and several commonly-used pipe materials are studied. A model of heat exchanger with ...
    • Impacts of Some Building Design Parameters on Heat Pump Applications 
      Erdim, B.; Manioglu, G. (Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu), 2011)
      One of the most important properties of a sustainable building is to provide thermal comfort conditions for users with a minimum heating and cooling energy consumption. Therefore, primary design parameters of building ...
    • Impacts of Static Pressure Reset on VAV System Air Leakage, Fan Power and Thermal Energy - Part 2: Case Demonstration for a Typical Climate System 
      Liu, M.; Zheng, K.; Wu, L.; Wang, Z.; Johnson, C. (Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu), 2007)
      In Part 1 of this paper, the theoretical models, integrating the fan airflow, fan head, air leakage factors, are developed to analyze the impacts of the static pressure reset on both pressure dependent and pressure independent ...
    • Impacts of Static Pressure Reset on VAV System Air Leakage, Fan Power and Thermal Energy - Part I: Theoretical Model and Simulation 
      Liu, M.; Feng, J.; Wang, Z.; Wu, L.; Zheng, K.; Pang, W. (Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu), 2007)
      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 ...
    • Impacts of Static Pressure Set Level on the HVAC Energy Consumption and Indoor Conditions 
      Liu, M.; Zhu, Y.; Claridge, D. E.; White, E. (Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu), 1996)
      Air static pressure must be maintained at a certain level leaving the air-handing unit (AHU) to force a suitable amount of air through the terminal boxes. However, an excessive static pressure level is often used due to ( ...
    • The Impacts of Utility-Sponsored Demand-Side Management Programs on Industrial Electricity Consumers 
      Rosenblum, J. I. (Energy Systems Laboratory (http://esl.tamu.edu), 1994-04)
      One of the most pressing issues in electric utility regulation today is the extent to which demand-side management (DSM) programs should be promoted by utilities. DSM refers to energy-efficiency or conservation measures, ...
    • Impacts of Water Loop Management on Simultaneous Heating and Cooling in Coupled Control Air Handling Units 
      Guan, W.; Liu, M.; Wang, J. (Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu), 1998)
      The impacts of the water loop management on the heating and cooling energy consumption are investigated by using model simulation. The simulation results show that the total thermal energy consumption can be increased by ...
    • An Impeller Dynamic Risk Assessment Toolkit. 
      Schiffer, Donal M.; Syed, Asadullah (Texas A&M University. Turbomachinery Laboratories, 2006)
      A standardized and cost-effective risk assessment toolkit is described in this paper to comprehensively analyze centrifugal compressor impellers under steady and dynamic loads. The first step in this process occurs in the ...
    • Impeller High cycle fatigue failure on a Natural Gas Pipeline Compressor Following Choked Flow Operation 
      Moyroud, Francois; Alas, Pascal; Libeyre, Francois (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      The impeller of a natural gas pipeline compressor failed at the junction between the blade trailing edge and the hub. A root cause analysis showed the machine had been operated beyond the compressor map right limit during ...
    • IMPELLER MANUFACTURING – UNDERSTANDING THE METHODS & THEIR IMPACT ON PERFORMANCE 
      Frier, Sean; Sorokes, James M.; Burkardt, Nicholas (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station; Texas A & M University. Libraries; Texas A & M University. Libraries, 2021)
      This tutorial provides an overview of the manufacturing processes used to build centrifugal compressor impellers and how the various processes can impact the performance of these critically important components. Comments ...
    • IMPELLER MANUFACTURING – UNDERSTANDING THE METHODS & THEIR IMPACT ON PERFORMANCE 
      Frier, Sean; Sorokes, James M.; Burkardt, Nicholas (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station; Texas A & M University. Libraries; Texas A & M University. Libraries, 2020)
      This tutorial provides an overview of the manufacturing processes used to build centrifugal compressor impellers and how the various processes can impact the performance of these critically important components. Comments ...
    • Impeller Repair Techniques For Centrifugal Compressors. 
      Clayton, Charles R. (Russ); Klein, Darwin; Emerick, Mark F. (Texas A&M University. Turbomachinery Laboratories, 1994)
      Successfully repairing centrifugal compressor impellers requires careful consideration and planning. The selection of techniques for inspection, material, and welding procedures are determined by numerous factors. Original ...
    • Impeller Rerate To Reduce Hydraulically Generated Vibration 
      Dyson, Gary (Texas A&M University. Turbomachinery Laboratories, 2005)
      The vibration of centrifugal pumps, running at both best efficiency point (BEP) and at low flow, is of interest to both pump designers and users. This vibration is responsible for the poor seal and bearing life and reduced ...
    • Impeller Stall Induced by Reverse Propagation of Non-Uniform Flow 
      Iwamoto, Shinji; Shoji, Yoshiaki; Yoneda, Keizo; Nakaniwa, Akihiro; Barrington, Bryan (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      In the case of centrifugal compressors, minor non-uniform flow upstream of the impeller is induced by an asymmetrical configuration in the circumferential direction at the compressor suction casing. This non-uniform flow ...
    • Impeller Stall Induced By Reverse Propagation Of Non-Uniform Flow Generated At Return Channel 
      Iwamoto, Shinji; Yoneda, Keizo; Tokuyama, Shinichiro; Higuchi, Hirofumi; Nakaniwa, Akihiro; Barrington, Bryan (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      In the case of centrifugal compressors, minor non-uniform flow upstream of the impeller is induced by an asymmetrical configuration in the circumferential direction at the compressor suction casing. This non-uniform flow ...
    • Implementation And Long-Step Sensorless Control Of Permanent Magnet Synchronous Machines (PMSM) For Subsea Applications 
      Ifrim, Costin (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2013)
      By design, the operation of a large 3MW permanent magnet motor-driven pump system has the potential to improve system efficiency and reliability to lower operator costs. Subsea electrical system design and motor performance ...
    • Implementation of a Corporate Energy Accounting and Forecasting Model 
      Kympton, H. W.; Bowman, B. M. (Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu), 1981)
      The development and implementation of a Frito-Lay computer based energy consumption reporting and modeling program is discussed. The system has been designed to relate actual plant energy consumption to a standard consumption ...
    • Implementation of an Integrated Energy Information System in a Large University Campus 
      McBride, J. R.; Schuster, L.; Rickey, D. (Energy Systems Laboratory (http://esl.tamu.edu), 2003-05)
      This paper describes the design, installation and implementation of an integrated energy information system at the central plant, auxiliary utility plants, and selected buildings at the University of New Mexico in Albuquerque. ...
    • Implementation of Boiler Best Practices 
      Blake, N. R. (Energy Systems Laboratory (http://esl.tamu.edu), 2000-04)
      Boilers are an essential part of any industrial plant, and their efficient, economical operation can significantly affect the reliability and profitability of the entire plant. Best Practices for Boilers include tools to ...