Unlocking Energy Efficient Ventilative Cooling Through Emerging CEN & ISO Standards
Chair(s): Christoffer Plesner (VELUX A/S, Denmark), Jannick Roth (WindowMaster International A/S, Denmark)
Join us for an insightful session as we delve into the latest insights for overheating mitigation using design guidance of ventilative cooling systems (free cooling) in combination with supplementary or mechanical cooling to reach acceptable thermal comfort and further how to unlock and leverage this content from emerging CEN & ISO standards into potential national legislations. In this dynamic session, experts from various disciplines will converge to explore the content and usability of the applied methods in the upcoming standards, discussing insights of the long writing process, while also leaving good time for discussions in the latter part of the session.
The purpose of this session is to:
1) Give an overview of how ventilative cooling (free cooling), either alone or in combination with e.g. mechanical cooling fits in the standardisation world through new emerging CEN & ISO standards for design of ventilative cooling systems
2) What are the gaps in current international standards and how ventilative cooling can fit into current and future standards (e.g. EN and ISO standards)
3) Give examples on how ventilative cooling has been implemented into USA buildings and how the new developed ventilative cooling potential method compares against dynamic simulations.
4) Highlight the revised CIBSE AM10 (UK guidance document) and its ability to take Ventilative Cooling into account as well as its influence on documents like ASHRAE.
5) Discuss insights and discussions from the developing process in the upcoming CEN & ISO standards on ventilative cooling
6) Have an interactive discussion on the design paths to secure an optimal ventilative cooling design and receive input from the audience on subjects to be included in these design paths and how to implement these standards at national level.
Presentations of the Workshop
Introduction and why Ventilative cooling
Christoffer Plesner1, Jannick Roth2
1VELUX A/S, Denmark, 2WindowMaster International A/S, Denmark
An introduction of the topical session whereby the importance of proper design standards for (free cooling) system in order to reach set thermal comfort criteria from standards or legislation. Further insight into why ventilative cooling is relevant for low carbon buildings in terms of overheating mitigation and how this plays out in standards.
Case Studies from USA and Ireland - Ventilative Cooling as part of an Integrated Efficient Design solution
Jannick Roth1, Paul O'Sullivan2
1WindowMaster International A/S, Denmark, 2Munster Technological University, Ireland
Discover how natural ventilative cooling has been successfully combined with mechanical cooling in actual U.S. building projects. The potential of natural ventilative cooling varies from project to project and depends on factors like the external environment and the thermal comfort criteria.
A new tool has been developed to assess the potential of ventilative cooling in the early design phase including the use of mechanical cooling. The ventilative cooling potential tool (VC tool) aims at assessing the potential effectiveness of ventilative cooling strategies by taking into account also building envelope thermal properties, occupancy patterns, internal gains and ventilation needs. The VC tool has been compared with detailed IES-VE simulations (dynamic simulation tool) including a Monte Carlo simulation-based sensitivity analysis providing building designers with useful information about the possibilities of ventilative cooling as well as the need for mechanical cooling.
Overview and Insights from the Developing Process of “final” new emerging CEN and ISO Standards on ventilative cooling
Christoffer Plesner1, Jannick Roth2
1VELUX A/S, Denmark, 2WindowMaster International A/S, Denmark
Ventilative cooling technical documents are being developed at CEN and ISO level. These documents are currently being drafted and will soon be finalized. We will give insight of why ventilative cooling design standards are necessary and why they play a key role in evaluating criteria standards or legislation on international level. Further information on the connection among CEN, ISO and ASHRAE standards could be discussed.
Effect Of Revised CIBSE AM10 (Natural Ventilation Guidance Document) on Technical Documents like ASHRAE (e.g. including elevated air flows and adaptive comfort approach)
Benjamin Jones
University of Nottingham, UK
Get an insight into the recently amended, CIBSE AM10 "Natural Ventilation in Non-Domestic Buildings" that offers updated guidance on the design and application of natural ventilation systems. The document addresses a broad range of topics, including the fundamental principles of natural ventilation, system types, design strategies, performance evaluation, and integration with other building services.
CIBSE AM10 is intended to be used as a reference for best practices in the field of natural ventilation and is currently referenced in documents like ASHRAE 62.1. It is intended to support engineers, architects, and designers in developing buildings that enhance occupant comfort, improve energy efficiency by utilizing natural ventilation and ventilative cooling.
Ventilative cooling is implemented as a new term in the amended version of CIBSE AM10 and its performance can be evaluated through one of the fundamental methods.
It is intended to support engineers, architects, and designers in developing buildings that enhance occupant comfort, improve energy efficiency, and minimize environmental impact by utilizing natural ventilation
Practical Application of Ventilative Cooling - A 9 Key Step Design Process for good Ventilative Cooling performance
Paul O'Sullivan
Munster Technological University, Ireland
Key aspects of the Design standards are given, mainly on the CEN standard which is closest to being “finalized”, where a 9 key design step process is dwelled into showcasing a way to design a free cooling system “from scratch” and how this process could help to eliminate lock-in effects of poor design decisions early on. Lastly the “resilience” aspect of a resilient system design will be revealed and discussed.
Discussions On Future Usage of content of Emerging CEN & ISO standards e.g. Design process and methods
Christoffer Plesner1, Jannick Roth2
1VELUX A/S, Denmark, 2WindowMaster International A/S, Denmark
We invite the participants to an interactive discussion on the design paths to secure an optimal ventilative cooling design and receive input from the audience on subjects to be included in these design paths and how to implement these standards at national level. What are the learnings and key considerations needed to implement ventilative cooling solutions in the ISO regions and the integration with mechanical cooling.
