The EIE 2003 SAVE ENPER EXIST project (www.enper-exist.com) aims to address the specificproblems of the existing buildings in the scope of the introduction of the Energy Performance ofBuildings Directive (EPBD).In this project a specific work package (WP4) aim to develop a long-term roadmap for definingpossible measures going beyond the EPBD allowing existing buildings to become more energyefficient.The main objectives of the task are:- To give an overview of possible legal measures for existing buildings with illustration byavailable examples and pr
Important properties of the indoor air quality are temperature and humidity. Very often in new and oldbuildings the temperature is too high or varies too strongly. A suspended ceiling with phase changematerials has a good influence to avoid too high indoor air temperatures. An additional heat exchangerat the outside of the building can increase the efficiency of the system by working in the night andcooling down the phase change material, so that after this cooling the full heat storage capacity isattainable.
The use of artificial lighting in the office buildings has significant contribution on total energyconsumption of the building. With the increase in the price of energy and public becoming moreenergy conscious, more attention has been given to the energy efficient lighting.
The aim of the Pythagoras project is the development and assessment of Greek national trainingmaterial in the sector of indoor environmental quality. The need for education in this specific sector isdictated by the significant indoor environment deterioration and associated health hazards, which arecaused by low ventilation levels, combined with the use of many modern building materials thataggravate pollutants emissions.
It is often claimed that energy is consumed, not only in everyday conversation but also in scientificdiscussions associated with energy and environmental issues. This claim conflicts with the first law ofthermodynamics stating that the total amount of energy is conserved, even though forms of energymay change from one to another.
Even if the quality and durability of active solar systems equipments are henceforth ensured, there arestill some considerable barriers to the development of their market, in particular their architectural andtechnical integration to the buildings. Our research aims at studying, designing and realizing astructural component of building ensuring in a permanent and integrated way the set of functionsnormally provided by elements of faade and by thermal liquid-cooled collectors. The product isintended to be distributed and implemented by building professionals.
This paper analyzes the indoor hygrothermal loads measured in 27 detached houses and in 13apartments. A survey was conducted during the years 2003-2006 in Estonia. The temperature andrelative humidity (RH) were continuously measured in bedrooms, living rooms, and outdoors at onehour intervals. For the hygrothermal analysis, the determined design curve of the moisture excess forhouses with low occupancy on the higher 10 % critical level was +4 g/m3 during the cold period(Tout ? +5 C) and +1.5 g/m3 during the warm period (Tout ? +15 C).
This paper summarises the work of the LowEx co-operation /1/. The aim was to promote rational use ofenergy by encouraging the use of low temperature heating systems and high temperature cooling systems ofbuildings. These systems can use a variety of fuels and renewable energy sources. Energy is used efficientlywhile providing a comfortable indoor climate. Exergy defines the quality of energy and is a concept fordesigning and assessing different heating and cooling systems. Application of exergy analysis into buildingshas not been common before.
This paper presents an analysis of the transient thermal performance of dynamic insulation. A modelbased on heat transfer through porous media is introduced, considering two types of boundaryconditions: (1) indoor temperature and outdoor temperature are constant; (2) indoor temperature isconstant while outdoor temperature changes. By solving the model numerically, it is found that for thefirst kind of boundary condition, the temperature profile in the wall will reach steady-state within onehour, when the porosity is high.
We have conducted a campaign of testing efficient lighting installations during 6months in the area of Lyon, France. 26 work places were tested, each of them with aspecific lighting scheme. The goal was to identify directions in preferred lightingschemes requiring less electrical power. Users could adjust their lighting conditionsthanks to different control systems : dimmer, daylight and occupancy sensors,separate ambient/task luminaires.