IBPSA1997

An extensive experimental program on single sided natural ventilation was  carried  out  within the frame of PASCOOL EC research project. Within the frame of these activities, four single sided natural ventilation experiments were carried out in a test cell, a full scale outdoor  facility. Experimental data were used as  input  for numerical simulations that  were  carried  out using air flow calculation tools based on network modeling as well as computational fluid dynamics (CFD). Finally, fuzzy logic techniques were used to predict the air velocity profile in the middle of the opening.

This paper describes a series of tests that were performed to determine whether a neural-network model could outperform a correlation-based model in representing foundation heat losses. The two models were trained with data generated by BASECALC, a finite-element-based program for modelling foundation heat losses.

Modelling and simulation play a number of roles in engineering design studies. For Gaz de France, these studies must satisfy exacting criteria of quality and rapidity. Studies are even more effective if models developed on previous occasions can be stored and reused and if the company is able to share models with its partners. The development of model exchanges is therefore a key factor determining the future scope of modelling/simulation activities. The Modelica design group was set up to design of a new language for physical modelling.

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.

The paper presents the results from a numerical and experimental investigation of the velocity distribution in a ventilated industrial hall in the nuclear power plant in Bulgaria. The room with a complex geometry and irregular boundary conditions was calculated using the finite volume discretisation of the Reynolds-averaged Navier-Stokes equations closed by the standard k-e turbulence model. The numerical results are compared with the experimental data in representative cross-sections which shows a satisfactory agreement.

The paper presents an interactive on-line package for calculation of energy and cost demands for residential infiltration and ventilation, with input and output data entry through a web browser. This is a unique tool. It represents a new kind of approach to developing software employing user (client) and server (package provider) computers. The main program, servicing “intelligent” CGI (Common Gateway Interface) calls, resides on the server and dynamically handles the whole package performance and the procedure of calculations.