Dynamic Modeling, Intelligent Control and Diagnostics of Hot Water Heating Systems PDF Download
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Author: Lian Zhong Li
Publisher:
ISBN:
Category :
Languages : en
Pages : 452
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Book Description
Author: Lian Zhong Li
Publisher:
ISBN:
Category :
Languages : en
Pages : 452
Get Book Here
Book Description
Author: Lianzhong Li
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Heating, ventilating and air-conditioning (HVAC) systems have been extensively used to provide desired indoor environment in buildings. It is well acknowledged that 25-35% of the total energy use is consumed by buildings, and space heating systems account for 50-60% of the building energy consumption. Furthermore, roughly half of the energy consumed goes to operation of heating systems. In the past few years the energy use has shown rapid growth. Therefore, it is necessary to design and operate HVAC systems to reduce energy consumption and improve occupant comfort. To improve energy efficiency, HVAC systems should be optimally controlled and operated. This study focuses on developing advanced control strategies and fault tolerant control (FTC) using information from fault detection and diagnosis (FDD) for hot water heating (HWH) systems. To begin with, HWH system dynamic models are developed based on mass, momentum and energy balance principles. Then, embedded intelligent control strategies: fuzzy logic control and fuzzy logic adaptive control are designed for the overall system to achieve better performance and energy efficiency. Moreover, in designing the advanced control strategies, the parameter uncertainty and noise from measurement and process are taken into account. The extended Kalman filter (EKF) technique is utilized to handle system uncertainty and measurement noise, and to improve system control performance. After that, a supervisory control strategy for the HWH system is designed and simulated to achieve optimal operation. Finally, model-based FDD methods were developed by using fuzzy logic to detect and isolate measurement and process faults occurring in HWH systems. The FDD information was employed to design model-based FTC systems for various faults and to extend the operating range under failure situations. The contributions of this study include the development of a large scale dynamic model of a HWH system for a high-rise building; design of fuzzy logic adaptive control strategies to improve energy efficiency of heating systems and design of model-based FTC systems by using FDD information.
Author: YiTeng MA
Publisher:
ISBN:
Category :
Languages : en
Pages : 115
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A dynamic model of a hybrid hydronic heating system has been developed. Simulations of the control strategies and the model-based energy analysis for the overall system have been presented in this thesis. The hybrid hydronic system is composed of a conventional natural gas fired boiler hot water heating and a ground source heat pump system. The overall system consists of several components such as a boiler, a heat exchanger, a ground loop heat pump, a ground loop heat exchanger, baseboard heaters, and radiant floor hydraulic piping systems. The system model was described by nonlinear differential equations, which were programmed and solved using MATLAB. Two control strategies for improving the overall system performance were explored: (i) a conventional PI control, and (ii) an adaptive gain control. The simulation results subject to set-point changes showed that the performance of the adaptive controller is better than the fixed gain PI controller in disturbance rejection and stability. Energy simulations under three different operating strategies were conducted: (i) a conventional fixed set-point PI control, (ii) an outdoor air temperature reset control, and (iii) an optimal set-point PI control. It was shown that the outdoor temperature reset strategy can save 4.5% and 19.9% energy under cold day and mild day conditions compared to the conventional fixed set-point PI control strategy. In addition, the iv implementation of the optimal PI control strategy result in higher energy savings 6.6% and 22% as compared to the base case under cold and mild day conditions, respectively.
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 360
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Author:
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ISBN:
Category : Physical measurements
Languages : en
Pages : 452
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Author: National Institute of Standards and Technology (U.S.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 480
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Author:
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Category : Mechanics, Applied
Languages : en
Pages : 400
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Author: Mat Santamouris
Publisher: Earthscan
ISBN: 1849770395
Category : Architecture
Languages : en
Pages : 335
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Book Description
Experts on energy efficiency and environmental quality of buildings. Spanning a broad range of technical subjects, this is a 'must have' reference on global developments in the field, suitable for architects and building engineers, environmental engineers, industry professionals, students, teachers and researchers in building science, technical libraries and laboratories. This first volume covers double skin faï¿1⁄2ades; artificial intelligence in buildings; indoor thermal comfort and the progress of the adaptive approach; heat island research and the effect of urban microclimate; the use of techniques such as high dynamic range imaging and satellite remote sensing; and vital management and monitoring approaches such as post-occupancy evaluation.
Author: DIANE Publishing Company
Publisher: DIANE Publishing
ISBN: 9780788146237
Category :
Languages : en
Pages : 168
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Book Description
Gathers in one place descriptions of NIST's many programs, products, services, and research projects, along with contact names, phone numbers, and e-mail and World Wide Web addresses for further information. It is divided into chapters covering each of NIST's major operating units. In addition, each chapter on laboratory programs includes subheadings for NIST organizational division or subject areas. Covers: electronics and electrical engineering; manufacturing engineering; chemical science and technology; physics; materials science and engineering; building and fire research and information technology.
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 692
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Book Description
