Based on 3 short time performance measurements, 4 visits together with user-interviews, 3 involvements in Ventilative Cooling (VC)-building-design, 2 long-term case studies and 11 expert interviews the paper presents a list of key performance-indicators of successful Ventilative-Cooling solutions as well as challenges together with examples of their successful overcoming.
Information has been collected from projects located in Austria, using Ventilative Cooling, both natural and mechanical ventilation, in both residential and office buildings, mainly in urban surroundings.
The list of key-performance indicators is:
- Design for very low pressure drop in the VC-system.
- Design for significant air change rates in the VC-system.
- Limit the operating time of automated VC to periods that physically make sense.
- Keep the VC-System free from Influences from AC-Components.
- Enhance VC-effects by heat transmission from adjacent rooms
- Design the VC-system for summer comfort at elevated air temperatures
- Strictly emphasise Operability and Reliability of VC Components because the challenges hide behind details:
- Safety & security aspects dealing with injury, burglary and vandalism
- Thermal Performance limitations
- Comfort aspects dealing with noise, dust and humidity
- Operational aspects dealing with (mis)adjustments in the control systems
- Economic aspects dealing with investment and maintenance