Modeling And Control In Air Conditioning Systems
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Modeling And Control In Air Conditioning Systems
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Author : Ye Yao
language : en
Publisher: Springer
Release Date : 2016-10-01
Modeling And Control In Air Conditioning Systems written by Ye Yao and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-01 with Technology & Engineering categories.
This book investigates the latest modeling and control technologies in the context of air-conditioning systems. Firstly, it introduces the state-space method for developing dynamic models of all components in a central air-conditioning system. The models are primarily nonlinear and based on the fundamental principle of energy and mass conservation, and are transformed into state-space form through linearization. The book goes on to describe and discuss the state-space models with the help of graph theory and the structure-matrix theory. Subsequently, virtual sensor calibration and virtual sensing methods (which are very useful for real system control) are illustrated together with a case study. Model-based predictive control and state-space feedback control are applied to air-conditioning systems to yield better local control, while the air-side synergic control scheme and a global optimization strategy based on the decomposition-coordination method are developed so as to achieve energy conservation in the central air-conditioning system. Lastly, control strategies for VAV systems including total air volume control and trim & response static pressure control are investigated in practice.
Hvac Control Systems
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Author : Chris P. Underwood
language : en
Publisher: Routledge
Release Date : 2002-09-11
Hvac Control Systems written by Chris P. Underwood and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-09-11 with Architecture categories.
This important new book bridges the gap between works on classical control and process control, and those dealing with HVAC control at a more elementary level, which generally adopt a qualitative and descriptive control. Both advanced level students and specialist practitioners will welcome the in-depth analytical treatment of the subject presented in this volume. Of particular significance are the current developments in adaptive control, robust control, artificial neural networks and fuzzy logic systems, all of which are given a thorough analytical treatment in the book. First book to provide an analytical treatment of subject Covers all new developments in HVAC control systems Looks at systems both in the UK and abroad
Dynamic Modeling And Advanced Control Of Air Conditioning And Refrigeration Systems
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Author : Bryan Philip Rasmussen
language : en
Publisher:
Release Date : 2005
Dynamic Modeling And Advanced Control Of Air Conditioning And Refrigeration Systems written by Bryan Philip Rasmussen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Dynamic Modeling Simulation And Control Of Transportation Hvac Systems
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Author :
language : en
Publisher:
Release Date : 2013
Dynamic Modeling Simulation And Control Of Transportation Hvac Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Modeling Design And Control Of Partial Ice Storage Air Conditioning Systems
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Author : Mark Stanley Cummings
language : en
Publisher:
Release Date : 1989
Modeling Design And Control Of Partial Ice Storage Air Conditioning Systems written by Mark Stanley Cummings and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
Modeling And Fault Tolerant Control Developed For Hvac Systems
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Author : Raad Z. Homod
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2014-07-23
Modeling And Fault Tolerant Control Developed For Hvac Systems written by Raad Z. Homod and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-23 with categories.
The main objective of this book is to control indoor temperature and reject faults tolerant like sensor deterioration, noise, disturbance and depreciation of the plant in building air conditioning system; we propose a fault tolerant controller system (FTCS) strategy for temperature control of air-conditioning system. The set-point response controller in the FTCS is designed in terms of insusceptible with noise, failure sensor, disturbance and parameter variation with optimal performance specification. The output of system was predicted through indoor, outdoor disturbance, at last based on the mathematical model of air-conditioning space. According to the system operation requirement for faults rejection, a closed-loop for rejecting faults signals is configured. It is found that the set-point response, the disturbance rejection, the noise rejection, the robust, rejection of failure sensor and the performance of the designed FTCS are better. Therefore the residual signal can now be used to monitor faults in the system while the proposed method ensures correctness of operation. Furthermore, FTCS has achieved the desired indoor temperature, superior performance, adaptation, robustness.
Modelling And Control Of An Air Conditioning System With An Emphasis On Cooling Coil Behaviour
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Author : Shi-Ming Deng
language : en
Publisher:
Release Date : 1991
Modelling And Control Of An Air Conditioning System With An Emphasis On Cooling Coil Behaviour written by Shi-Ming Deng and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Air conditioning categories.
Return Fan Control Modeling For Heating Ventilating And Air Conditioning Systems
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Author : James Robert Vens
language : en
Publisher:
Release Date : 1986
Return Fan Control Modeling For Heating Ventilating And Air Conditioning Systems written by James Robert Vens and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Modeling And Construction Of A Computer Controlled Air Conditioning System
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Author :
language : en
Publisher:
Release Date : 2007
Modeling And Construction Of A Computer Controlled Air Conditioning System written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
As energy efficient devices become more necessary, it is desired to increase the efficiency of air conditioning systems. Current systems use on/off control, where the unit primarily operates in the long lasting start up transients. A proposed solution is an air conditioning unit that runs continuously with active computer control implemented to maximize efficiency. The objective of this thesis is to develop a mathematical model for a specific air conditioning unit and to compare this model to measurements made on the specific unit. This model can then be used to develop a multi-input multi-output control law in the future. In this thesis, a linearized moving interface lumped parameter model is presented, and the derivation verified with great detail. The model predicts transient perturbations from a steady state operating point. The air conditioner tested in this work required several modifications including the addition of sensors and controllers. A description of the system is provided. Methods used to determine all of the parameters for the model are given with explanation. The model is simulated with computer software and compared with experimental data. Simulations predict the final value of superheat and pressures in the evaporator and condenser well for step changes in the compressor speed and expansion valve opening.
Modeling And Control Of A Three Evaporator Air Conditioning Teac System With An Emphasis On Improved Indoor Humidity Control
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Author : Huaxia Yan
language : en
Publisher:
Release Date : 2016
Modeling And Control Of A Three Evaporator Air Conditioning Teac System With An Emphasis On Improved Indoor Humidity Control written by Huaxia Yan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Air conditioning categories.
Secondly, the thesis presents the results of two Sets of specifically designed experiments on the operating characteristics of the experimental TEAC system. In the first Set, changes in the operating parameters in one of the three IUs/ ISs were introduced, but that in two of the three IUs/ ISs in the second. Similar coupling effects of mutual influences reported in previous dual-evaporator air conditioning (DEAC) systems may also be observed in the first Set. However, when the operating parameters in two of the three IUs/ ISs were varied, the coupling effects became more complicated, with mutual influences being more remarkable than that in the first Set with even less variation magnitude. Furthermore, the operating characteristics on both the refrigerant side and air side of each IU/ IS in the experimental TEAC system were also studied, which is the first of its kind in the open literature. Thirdly, the development of a dynamic mathematical model for the experimental TEAC system is presented. The model was built based on the sub-models of major system components in the TEAC system, including a variable speed compressor, an air-cooled condenser, three electronic expansion valves, three IUs and ISs. Unlike all other reported TEAC models, both sensible and latent heat balances on the air side of all IUs were specifically taken into account in the TEAC model developed. The model was experimentally validated using the experimental TEAC system. Model predictions were found to be within ℗ł6% of the measured values, suggesting that the model developed was capable of simulating both the steady state and dynamic operation of a TEAC system with an acceptable accuracy. Finally, the development of a novel capacity controller for the experimental TEAC system for improved indoor humidity control is reported. The novel controller was developed by integrating two previously developed control algorithms, one for a DEAC system for temperature control and the other for an SEAC system for improved indoor humidity control. Both simulative and experimental controllability tests were carried out, using the validated TEAC model and the experimental TEAC system, respectively. The controllability test results showed that, with the novel controller, improved control over indoor air humidity and better energy efficiency for the TEAC system could be obtained, as compared to the use of traditional On-Off controllers extensively used in MEAC systems.