Proceedings right light 2nd european conference on energy-efficient lighting. Availability of daylight in Europe and design of an European daylighting atlas. European Conference on Energy Efficient Lighting [2, 26-29 Set. 1993, Arnhem].

Page, John ...[et al.].

1993

530
CIENA

This paper firstly reports action on the Joule 1 dayligting measurenment programme which has been iniciated and partly funded by DGXII of the CEC under their Joule 1 programme. The programme of observations is complete and full report is now being prepared on the whole project. Measurements of considerable complexity have been completed in five very different climates, Nantes and Lisbon on or near to the Atlantic coast, BRE Garston north of London, Vaulx-en-Velin close to Lyon. Data for one Mediterranean site has been obtained from Athens, which has a fairly polluted daylight climate. A systematic set of luminance data has been archived for the BRE site. These data have been used to evaluate the accuracy of different daylighting luminance models under different amounts of cloudiness. An important aim of the programme has been to try to understand the climatic factors which influence daylighting climate rather than simple to assemble measurements data. Considerable attention has been given to testing daylight prediction algorithms which use the luminous efficacies of sunlight and skylight to derive daylight data from observed solar radiation data. Such validated models will be used in the further development of the CEC work on daylighting climatology, using the widely availabale standard observations of irradiation. The paper secondly reviews the aims and objectives of the recently started CEC DGXII Joule 2 daylighting programme. This again has been initiated and partly founded by the CEC DGXII. The main goal of this second project is to publish a daylighting design atlas covering the present European community countries, but measurements are also ongoing of 4 of the 5 sites used in Joule 1 to extend the existing daylighting data series in time. AVAILABILITY OF DAYLIGHT IN EUROPE AND DESIGN OF A EUROPEAN DAYLIGHT ATLAS. INTRODUCTION. MEASURING SITES AND OBSERVATIONS MADE. STRUCTURE OF THE ATLAS. THE PROPOSED FORM OF THE DAYLIGHTING ATLAS. DATA PROCESSING AND EXCHANGE. LUMINOUS EFFICACY STUDIES. VERTICAL SURFACE MEASUREMENTS. LUMINANCE OBSERVATIONS AND MODELLING. RELATIVE LUMINANCE ALGORITHMS. INTERMEDIATE SKIES RELATIVE LUMINANCE ALGORITHMS. FREQUENCY DISTRIBUTION ANALYSIS. WITH SUNSHINE AND WITHOUT SUNSHINE ANALYSIS. SCALE MODEL STUDIES. DATA PRESENTATION CONCLUSIONS. REFERENCES.

Presenta gráfs.

EUROPA; ILUMINACION NATURAL; ATLAS; CLIMATOLOGIA; PROGRAMA JOULE 1; PROGRAMA JOULE 2;