The aim of this work is the realization of a design tool, which is a multiple model software called « CODYRUN », suitable for professionnals and usable by researchers. The original aspect of this software is that the designer has at his disposal a wide pa

It is well-known that there exist indoor temperature distributions. To have more precise predictions of indoor thermal comfort and better control of indoor thermal conditions, a both detailed and fast model of the dynamic indoor temperature distributions is needed. Unfortunately, very few papers studied such models due to the complexity of fluid (air) flows. CFD can be used as a detailed model. But it is too time consuming. This paper discusses two models in this respect, the fixed-flow-field model and air-zonal model. Both models are validated with experimental results.

The research we develop consists of evaluating "radiative comfort" during no heating periods in office buildings.The expression "radiative comfort" is used to characterise the thermal and visual component of the feeling of people set in indoor environments submitted to sky and sun irradiation by bay windows. Two numerical models, one for the visual behaviour and the other for the thermal aspect, have been adjusted We carried out simulations in the case of offices which is the main scope of our study.

A computational model for the detailed design of finned-tube heat exchangers is presented. Coils are discretised into tube elements for which the governing equations are solved using local values of temperature, pressure, physical properties and heat transfer coefficients. Single phase, condenser and evaporator cases can be treated using water, R22, R134a, and various refrigerant mixtures based on R32, R125, and R134a.

NEXT 21 is the experimental residential building ,completed in October 1993 at Osaka. Main theme of this project is to create comfortable housing for early 21th century life without the increase of stress to urban environment. For this purpose many experimental design ,such as, earth covered roof , ecological garden, greenery for wild birds and many efficient mechanical systems were applied to this building.

In this paper, a part of the results of a study realised in Chambéry to develop the use of solar energy in small and medium European cities is presented. This analysis is based on the evaluation of the solar potential of the city, then a balance of saved

Tests were conducted on two instrumented air-cooled water chillers (15 kW and 30 kW cooling capacity). Refrigerants evaluated included R22 as the baseline fluid, R407C and R410B. When testing with R407C, the retrofit procedure did not involve any major hardware change. The results with the first chiller equipped with a counter-current plate evaporator showed that both capacity and EER are maintained within 5%. The second chiller, which was not equipped with a counter-current evaporator showed poorer results.

An approach to the steady-state simulation of heat pumps and refrigerating equipment is presented. Novel features of the proposed model are the strategy and formalism adopted in the programme development. Individual mathematical models for component design are linked to enable the simulation of a basic vapour compression cycle. This paper introduces some of the component modules, which can be used for pure as well as mixed refrigerants.

Researchers involved in studying problems concerning the built-up environment face an objective complexity, of easy instrumental evaluation, and a subjective complexity which is psycho-physiological concerning human beings with different individual reactions to the same exposure conditions.

On the way to the solution of our energy-problems, the conditioning of buildings is the most importantsector. We have to create new buildings, that produce more energy than they need in the course of ayear, so called plus-energy buildings and we have to perform large-scale retrofitting of existing buildings. Priority must be given to increasing energy-efficiency. Having fulfilled this, the implementation of renewable energy has to be undertaken.