HVAC systems are significant consumers of energy, however building management systems do not typically operate them in accordance with occupant movements. Due to the delayed response of HVAC systems, prediction of occupant locations is necessary to maximize energy efficiency. In this paper we present an approach to occupant location prediction based on association rule mining, which allows pred...

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...

ENSC 461 (S 11) Gas Vapor Mixtures and HVAC 1 Gas Vapor Mixtures and HVAC Atmospheric air normally contains some water vapor (moisture). The dry-air contains no water. Although the amount of water vapor in the air is small, it plays a major role in human comfort and thus in air-conditioning applications. The temperature of air in air-conditioning applications ranges from about -10 to 50°C. In t...

the purpose of this study is to identify parameters influence on the particle deposition within fin and tube heat exchanger of air-conditioning systems by cfd analysis. first the basic sketch of periodic geometry drawn and meshing operation including boundary conditions was performed. then the gas side properties and flow parameters were solved by ansys fluent 14.5 software. lagrangian equation...

This paper reports the findings of an evaluation study of the 2006-2007 Sacramento Municipal Utility District (SMUD) Residential HVAC Retrofit program. The program’s savings calculations assumed that 96 percent of non-participant retrofits in their territory are not complying with California’s ambitious 2005 energy code to some degree. The evaluation study included comprehensive performance tes...

An adaptive approach to control a cooling coil chilled water valve operation, called adaptive fuzzy logic control (AFLC), is developed and validated in this study. The AFLC calculates the error between the supply air temperature and supply air temperature set point for air in an air handling unit (AHU) of a heating, ventilating, and air conditioning (HVAC) system and determines optimal fuzzy lo...