IBPSA1999

This paper is focused on the development of measuring equipment of Effective Leakage Area (ELA) by AC pressurization method. The formula to design the measuring system is derived according to the governing equation of the leakage, e.g. in terms of flow rate through the leakage, volume changing, sinusoidal pressurization, etc.

Optimization of thermal storage tank operation is one of the major areas for energy conservation in HVAC systems. In the present paper, an algorithm is developed for optimum operation of thermal storage tank, by minimizing non-linear cost function. Results are validated under stationary and random load conditions. It is concluded that the present algorithm is quite robust and provides an optimal scheme of operation.

For effective energy use and level off electricity demand throughout the day, thermal energy storage system is getting popular in HVAC systems in Japan. Load profile prediction can provide information to plan optimal operation, and now, various prediction approaches have been developed, for example, Autoregressive Integrated Moving Average (ARIMA) model, Topological Case Based Modeling (TCBM), Artificial Neural Network (ANN), and other approaches.

An optimal operational planning system with a userfriendly interface using an object-oriented framework is developed for the purpose of determining operational strategies of energy supply plants in a simple and rational manner on personal computers.

This paper explains the development of a dedicated configuration tool for the HVACSIM+ simulation environment. This computer-based tool eases configuration by exploiting a visual metaphor of a simulation subject. This paper also explains the configuration tool's method of development, its functionality, and suggests some potential applications which could benefit from an object-oriented development. The tool was developed with object-oriented technology in 1994.

It is required that the urban air temperature is estimated on the average and macroscopically for studying the urban thermal environmental problems in summer. The diurnal variations of urban air temperature and heat budget components are investigated using one dimensional heat budget model. The evaporative efficiency and the anthropogenic heat were estimated by means of inverse operation using the observed air temperature. Good coincidence was obtained with the observed air temperature and the calculated.

The objective of the work presented in this paper is to develop a building performance assessment tool that will assist the design process rather than be aimed at giving endorsement to a completed design. he paper discusses the concepts behind the ongoing development of this new assessment tool. To effectively place it into the designer’s hand, this tool is self-contained – the simulation programs are directly linked to the assessment modules.

A building simulation program has been developed and a model of a standard Swedish single family house has been built up. The model uses an explicit finite-difference method to calculate the temperatures of the next time step. The main output from the programme is energy consumption values and temperatures. The simulation program can either be run as a real time simulation tool (SPsim) or as a pure simulation tool (SPber). The paper is describing the general concept of the models used. It also gives examples of results obtained by using the program.

Addressing the complexity underlying design questions does not appear to be sufficient reason for simulation to be widely deployed in design practice. Useful insights must be delivered within the context of the time and resource constraints of the design process. This paper reports on recent work which addresses this issue through a computer-based project management environment.

This paper presents the process followed for defining the features of the next-generation HOT2000 simulator, and the conclusions drawn at the workshops, concerning the most appropriate modelling approaches. It also summarizes the survey of existing programs, and presents the rational for the selection of the starting point for the HOT2000 simulator