In this study, internet-controlled heating ventilating and air-conditioning (HVAC) system has been proposed with programmable sleeping time and automatic operation mode, three steps fan speed unit, adjustable fan angle, a remote control device with an LCD and a web based control unit. A low cost microcontroller (MC) to control HVAC system and a PC as an Internet server are used. The system has ...

An energy flow model of an airport terminal’s HVAC system is established in this paper. Based on energy flow model, the exergy efficiency, exergy loss and exergy cost distribution ratio of each component are calculated and analyzed by the energy flow model. Optimization method and exergy balance equations are used to calculate the lowest exergy loss of HVAC system under different operation cond...

The highest time-averaged indoor radon concentrations for a slab-on-grade structure occur when the structure experience neutral pressure conditions. Experimental evidence was provided throughout the utilization of the University of Florida Radon Research House (UFRRH) showing that semi-diurnal atmospheric pressure variations are responsible for continuous pumping of radon-rich soil gas into the...

Heating, Ventilation and Air Conditioning (HVAC) systems consume almost half of the total energy use of commercial buildings. To optimize HVAC energy usage, it is important to understand the energy consumption of individual HVAC components at fine granularities. However, buildings typically only have aggregate building level power and thermal meters. We present HVACMeter, a system which leverag...

This paper describes the implementation of a knowledge management tool to capture and reuse the lessons learned from the installation of HVAC equipment. It has been developed as an adjunct to an existing system that uses case-based reasoning to reuse previous HVAC installation specifications and designs. The system described lets engineers recall details of installation and commissioning and op...

Conventional heating, ventilating, and air conditioning (HVAC) systems have traditionally used the temperature and the humidity ratio as the quantitative indices of comfort in a room. Recently, the carbon dioxide (CO2) concentration has also been recognized as having an important contribution to room comfort. This paper presents the modeling of an augmented HVAC system including CO2 concentrati...

A new hybrid intelligent system is proposed for Heating, Ventilation and Air Conditioning (HVAC) control by integration of Multiagent System (MAS), Dynamic Ontology (DO) and Ant Colony Optimization (ACO). The relevant combination between data driven and knowledge driven methods results in significant improvement of all behavioral indexes of HVAC control system – speed, stability, internal commu...

This paper describes the concept of using simulation as a tool for performance validation and energy analysis of HVAC systems. Recent advances in control system technology, including the development of open protocols such as BACnet have made sensor and control signal information from various components and subsystems in a building more accessible. This development has created significant potent...

We study providing ancillary service to the power grid by using the flexibility of HVAC (Heating, Ventilation, Air Conditioning) systems in commercial buildings. The building HVAC system’s thermal and power consumption models are constructed and key model parameters are estimated from measure data from Pugh Hall of University of Florida. We develop a method for optimal output tracking of a time...

Building Information Modeling (BIM) is an increasingly popular method for generating and managing facility information during the life cycle of a building, ranging from facility conceptualization, through design, construction and its operational life. Organizations involved in Facility Management (FM) have the opportunity to use BIM as a knowledge repository to document evolving facility inform...