نتایج جستجو برای: hvac system

تعداد نتایج: 2231969  

Journal: :IOP Conference Series: Materials Science and Engineering 2017

Journal: :E3S web of conferences 2021

With the rapid development of modern society, measurement and control requirements key variables air conditioning test technology are also increasing. When parameters HVAC system measured controlled, there a large number sensors instruments used. sensor failure or error distortion occurs, cannot operate normally automatically. At same time, some in be directly collected by sensor. In order to s...

Journal: :Majalah Ilmiah Pengkajian Industri 2021

2011
Momoh-Jimoh E. Salami

Intelligent Building Automation System (IBAS) is one of the heaviest researched areas motivated by the continuous high demand on economically-effective systems that are designed to provide a desirable controlled space for various organizations. IBAS has been developed along with the rapid sophistication of the information and control technologies in this study. The main objective of the continu...

2014
Evangelos Vrettos Frauke Oldewurtel Fengtian Zhu Göran Andersson

Active participation of demand-side resources in power system control tasks, i.e., demand response, is expected to facilitate the integration of renewable energy sources in the grid. In this paper, we present a novel hierarchical control scheme to enable provision of frequency control reserves by a pool of office buildings managed by an aggregator. The reserves are provided by controlling the c...

2011
Andrew Kusiak Guanglin Xu Fan Tang

A data-driven approach for the optimization of a heating, ventilation, and air conditioning (HVAC) system in an office building is presented. A neural network (NN) algorithm is used to build a predictive model since it outperformed five other algorithms investigated in this paper. The NN-derived predictive model is then optimized with a strength multi-objective particle-swarm optimization (S-MO...

2017
SNEJANA YORDANOVA

The indoor human comfort, working efficiency and health are dependent on the control of the quality of air in a heating-ventilation and air-conditioning (HVAC) system. The aim of present paper is to improve this control considering the most important variables – the air temperature, relative humidity and concentration of carbon dioxide by applying fuzzy logic and genetic algorithms (GAs) for co...

2012
F. J. Wang T. B. Chang C. M. Lai Z. Y. Liu

The HVAC systems for operating rooms are energy-intensive and sophisticated in that they operate 24 hours per day year-round and use large amount of fresh air to deal with infectious problems and to dilute microorganisms. However, little quantitative information has been investigated about trade-off between energy-efficient HVAC system and indoor environment quality especially when the operatin...

2013
Daniel Urieli Peter Stone

Heating, Ventilation and Air Conditioning (HVAC) systems are one of the biggest energy consumers around the world. With the efforts of moving to sustainable energy consumption, heat-pump based HVAC systems have gained popularity due to their high efficiency and due to the fact that they are powered by electricity rather than by gas or oil. One drawback of heat-pump systems is that their efficie...

2011
Diana Hintea James Brusey Elena I. Gaura Neil Beloe David Bridge

Car cabins are transient, non-uniform thermal environments, both with respect to time and space. Identifying representative locations for the Heating, Ventilation and Air Conditioning (HVAC) system sensors is an open research problem. Common sensor positioning approaches are driven by considerations such as cost or aesthetics, which may impact on the performance/outputs of the HVAC system and t...

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