English

Ventilation system is being recommended as an effective tool to improve indoor air quality(IAQ) in apartment houses. Recently, in Korea, apartment house suppliers are required by lawto establish ventilation systems in apartment houses. In this study, improvement of IAQ byestablishing mechanical ventilation system in apartment houses was investigated through mock-up tests. Seven apartment houses were arranged for the test and concentrations of VOCs and Formaldehyde were examined under various conditions of ventilation rates and duct works.

Improving ventilation performance both for energy and IAQ creates a trend of installing moreheat recovery supply and exhaust systems in new buildings and controlling better the airflows.Many studies have shown the impact of improved ventilation system on achieved performance but information about the market status and the difficulties in installing for instance supply ducts in collective dwellings are still lacking.

Food odor dispersion from residential unit to core is one of problems in high-rise residentialbuilding. In this study, it was analyzed in terms of stack effect, and the method how optimal air inflow of core was estimated and how the location of air in/outlet were decided were suggested to solve it. A combined CFD(Computational Fluid Dynamics) and CONTAMW analysis was used for stack effect of building, dispersion of food odor, optimal air inflow of core, and the location of air in/outlet in the method.

Air pressure conditions in typical Finnish residences are analyzed using data from fieldmeasurements and computer simulations. Field measurements were conducted in a two-storeydetached house and in a five-storey apartment building. The effects of airtightness, ventilationrate, air leakage distributions, and outdoor environmental conditions on air pressure conditions in a detached house were simulated on a multi-zone simulation model using the IDA ICE simulation program.

The objective of the paper is to evaluate the long term performance of the HVAC system in alaboratory building equipped with an advanced fume cupboard technology and a buildingautomation system. The exhaust airflow of the fume cupboard was controlled in terms of sashposition and a control unit. In addition, selected fume cupboards were equipped with presencesensors. The air supply and exhaust flow rates of the laboratory rooms were monitored during two years in normal operation conditions.

Personalized ventilation aims for supplying clean air to the breathing zone of each occupant.The impact of the direction of the personalized flow on the inhaled air quality was studied.Experiments were performed in a full scale room. Personalized ventilation in conjunction with mixing ventilation was used. Breathing thermal manikin resembled person seated at a desk. Tracer gas, mixed with room air was used to simulate pollution.

In a marine temperate climate historic buildings that are equipped with thermostat-controlledheating systems show very low relative humidities (RH) during the heating season. This maylead to mechanical damage due to drying of hygroscopic materials like e.g. wood. Humidistatcontrolled systems are investigated using two different cases. Two top monuments of theNetherlands serve for the case study: Hunting Lodge St. Hubertus and Muiden Castle.The effectiveness of a humidistat-controlled heating system is investigated, both by simulation and by experiment.

DCV is one of the main issues in the near future due to the large potential of energy savings,the importance of maintaining a good IAQ with an adequate ventilation rate and the optimisation of system sizing. Nevertheless the technology or sensor used must adequately follow the actual demand. The study shows on site results on two different technologies.The first site is a collective dwelling installed with natural ventilation system situated in Nangis, near Paris (France) which has been renovated with hybrid ventilation and humidity controlled outlets and inlets.

Ventilation systems with variable airflow rates (VAV) can be used to decrease the amount ofenergy used to heat and cool the supply air and move the supply and exhaust air. Additionally,the occupancy detection system can work together with the heating and cooling system anddecrease other energy uses by changing the indoor climate demands when building is not occupied. However, a VAV system has higher installation and maintenance costs than a system with constant airflow rate (CAV).

This paper describes an ongoing demonstration project on the use of personalized ventilationin practice. Several designs of air supply devices for PV were developed, tested and optimisedbased on the efficiency of clean air supply to occupants breathing zone, control functionality,aesthetic, etc. Pilot installation of the PV system in a number of offices was used to gather better experience on the interaction between occupants and the PV system.