English

General models for heat and mass transfer components have been developed for use in TRNSYS [1] thermal system simulations. These components remove some of the idealizations and detailed specifications that are required in existing TRNSYS component models. In these new component formulations, a set of parameters characterizing the performance of the component are fit using catalog data. This paper presents a technique for parameter estimation that can be used with realistic models to accurately represent equipment performance.

This is the second of two papers that describe the development of simulation methods for optimally controlled central plant equipment in IBLAST (Integrated Building Loads Analysis and System Thermodynamics). In Part II, the development and implementation of methods for simulating optimally controlled cold thermal storage in a building energy analysis program are described. The goal of optimising a thermal storage system is to minimise the daily energy cost of operating the system.

This is the first of two papers that describe the development of simulation methods for optimally controlled central plant equipment which have been implemented in the IBLAST (Integrated Building Loads Analysis and System Thermodynamics) building energy analysis program.

This paper is concerned with the optimisation of some design criteria for water based active solar space heating systems intended for residential applications in Cyprus.

The paper deals with the CFD (computational fluid dynamics) application to the comfort optimization of some complex architectural projects in which the physical interaction effects between the building and its environment affect strongly the building’s comfort conditions and the HVAC system behaviour. The author reports on his practical experience of modelling aerodynamic and thermodynamic interaction effects between internal and external air flows.

A dynamic simulation of the HVAC system is being paid attention because of the development of the computer technology. Authors examined the reproducibility of HVACSIM+(J). As current program could not calculate the object system, it was the new component model corresponding to a model system was developed. As the result, it was shown that HVACSIM+(J) have enough reproducibility and possibility to generate the database for the fault detection and diagnosis, FDD, by comparing the simulated results and the measurements.

Despite the obvious importance of thermal comfort in the design of indoor environment, it has not been effectively integrated with design decision support tools. The reasons can be attributed in part to an absence of modular and flexible software architecture that facilitates dynamic data transfer between energy performance, lighting simulation, and thermal comfort modules.

This paper presents an investigation of the energy performance in an office building in Daejeon, Korea. The office building has a south-facing glazed double envelope and a rectangular atrium. During the preliminary design of the building, a study was conducted by the research team in order to achieve the annual energy consumption per unit area of the building under 240 Mcal/m2-yr. A number of building designs and HVAC system variables were analyzed in terms of energy performance.

We first developed an actual HVAC experimental chamber including an air distribution system, an air handling unit, fan coil units, and control systems. This experimental chamber is a real size model of a typical office and has a floor area of 61.44m2.