PR2001

In this paper the experimental results of the measurements obtained after the completion of a test room realised in the laboratories of the Dipartimento di Energetica dell'Universit di Ancona and the development of the monitoring system are reported. The same authors have already discuss in others works the preliminary studies about these themes and in which it is possible to read the first data of the effectuated studies about climatization phenomena.

Air filters may be used to reduce indoor airborne concentration which is one of the main indoor air pollutants. Air filters performances have to be measured in order to be able to select the right product for a given application. But differences do exist between laboratory and field filter test results and HVAC installations have to be controlled regularly. EUROVENT 4/10 recommendation describes guidelines for the evaluation of the perpromances of HVAC air filters according to particle size in an installation.

When studying improvements on room by room air conditioning appliances (RAC), it is necessary to know for how long these appliances function and which is their effectiveness - EER - on average (or Seasonal) known as SEER. A method was developed for Europe, taking into account the cycling losses, the fouling losses and the variations due to outside temperature and humidity. Further to this the load was represented by an equivalent number of hours at full load.

The paper reviewed the supply opening models of describing inlet boundary conditions for indoor airflow simulation firstly. Then examples of isothermal free air jets from a grille are presented to validate full representation of supply openings. Some results by the simplified method called N-point supply opening model, are also shown to compare with the full representation method. Four different outlet conditions of a grille are studied. The k-e turbulence model is applied.

A potential conflict may exist between energy saving and good indoor climate. The present project is phase 2 of a 5-year research programme consisting of four phases, the objective of which was to develop energy efficient ventilation strategies that will provide both healthy and comfortable indoor climate and reduced energy consumption when compared to present standard.

Increased global warming and deterioration of the ozone layer have stimulated interest in the use of renewable energy systems. Natural ventilation is increasingly being employed in modern buildings to minimize energy consumption and the release of harmful emissions to the environment. Innovative natural ventilation techniques such as the windcatcher and solar chimney have facilitated the effective use of natural ventilation in a wide range of buildings for increasing the ventilation rate.

Energy Performance standardisation and legislation is receiving an increased interest in many countries. The paper is split up in 3 parts: An overview of the present status: which countries have such regulation in force or under preparation, what is the link with European standardisation? What are the challenges for achieving an effective EP approach? What are important on-going activities?

In this paper, measurement and simulation results are presented that demonstrate the energy performance of a recently built ecological house in Helsinki, Finland. The space heating energy consumption was measured to be 76 kWh/(m 2 a) of which 29% was provided by wood. For comparison, Finnish houses typically consume 120 kWh/(m 2 a) or nearly 60% more energy for space heating. The total energy consumption (121 kWh/(m 2 a)) and electricity consumption (28 kWh/(m 2 a)) were quite low.

In this paper, measurement and simulation results are presented that demonstrate the energy performance of a recently built ecological house in Helsinki, Finland. The space heating energy consumption was measured to be 76 kWh/(m 2 ?a) of which 29% was provided by wood. For comparison, Finnish houses typically consume 120 kWh/(m 2 ?a) or nearly 60% more energy for space heating. The total energy consumption (121 kWh/(m 2 ?a)) and electricity consumption (28 kWh/(m 2 ?a)) were quite low.

The performance of a Ventilated wall component under real weather conditions was tested, during two weather seasons, winter and summer. The component was built in a 1:1 scale, consisting of two equal area parts, a Ventilated wall with and without a radiant barrier. It was installed at the South faade of a PASSYS outdoor Test Cell at CRES. Air openings were located at the bottom and top of each wall component in order to facilitate the air movement through the air gap.