Impact of Heating Control Strategy and Occupant Behavior on the Energy Consumption in a Building with Natural Ventilation in Poland

This study aims to provide an experimental assessment of energy consumption in an existing public building in Poland, in order to analyze the impact of occupant behavior on that consumption. The building is naturally ventilated and the occupants have the freedom to change the temperature set point and open or close the windows. The energy consumption is calculated and the calculation results are compared with the experimental data. An analysis of occupants’ behavior has revealed that they choose temperature set points in a wide range recognized as thermal comfort, and window opening is accidental and difficult to predict. The implemented heating control algorithms take into account the strong influence of individual occupant preferences on the feeling of comfort. The energy consumption assessment has revealed that the lowering of temperature set point by 1 °C results in an energy saving of about 5%. Comparisons of energy consumption with heating control and without any controls showed that the potential for energy reduction due to heating control reached approximately 10%. The use of windows control, which allows to turn off the heating after opening the window and its impact on energy savings have been discussed as well

Lighting Control Including Daylight and Energy Efficiency Improvements Analysis

Energy used for lighting is one of the major components of total energy consumption in buildings. Nowadays, buildings have a great potential to reduce their energy consumption, but to achieve this purpose additional efforts are indispensable. In this study, the need for energy savings evaluation before the implementation of lighting control algorithms for a specified building is highlighted. Therefore, experimental tests have been carried out in a university building with laboratories and other rooms, equipped with KNX building automation system. A dimmable control strategy has been investigated, dependent on daylight illuminance. Moreover, a relationship between external and internal daylight illuminance levels has been evaluated as well. Based on the experimental results, the authors proposed a method for the rough estimation of electrical energy savings. Since, according to the EN 15232 standard, Building Automation and Control Systems (BACS) play an important role in buildings’ energy efficiency improvements, the BACS efficiency factors from this standard have been used to verify the experimental results presented in the paper. The potential to reduce energy consumption from lighting in non-residential buildings by 28% for offices and 24% for educational buildings has been confirmed, but its dependence on specific building parameters has been discussed as well

Transferts thermiques dans un arc-jet a basse pression

Available at INIST (FR), Document Supply Service, under shelf-number : 12493, issue : a.1995 n.3 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueSIGLEFRFranc

Regime d'ecoulement de plasma cree par un arc-jet a basse pression

SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : 12493, issue : a.1995 n.2 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Modelisation des jets de plasmas dans un generateur a arc et etude des instabilites

SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : 12493, issue : a.1994 n.7 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc