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The Killing Residence
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  1. The Killing Residence MDP presentation An analysis of health risks and air quality related to the Central Heat Recovery Ventilation System Students Mark Pepels (ST) Thijs Duisters (ST) Karel van Laarhoven (TN) Rick Vermij (ST) Stephan van Reenen (TN) Angela van der Heide (B) Clients Prof. Dr. J.E.M.H. van Bronswijk Prof. Ir. H. Leegwater Tutor I. van der Meulen Coördinator Dr. Ir. J.C. Reijenga

  2. Outline • Introduction • Project aim • Plan of approach • Hazard analysis • Experiments • Protocol • Conclusions • Recommendations • Questions

  3. Introduction Nowadays, energy is a hot topic

  4. Introduction • 2006: New regulations • EPC < 0.8 (Energie Prestatie Coëfficiënt) (energy performance coefficient)

  5. Introduction A solution: Central Heat Recovery Ventilation System (CHRV-system) • Energy efficient: 95% ( 510 m3 gas savings per year) • Comfortable indoor climate • 500.000 dwellings in the Netherlands

  6. Introduction

  7. Introduction inflow • Living room • Bedroom outflow • Bathroom • Kitchen • Toilet Installer adjusts valves and system settings: • Overall capacity • Distribution different rooms

  8. Introduction System settings:

  9. Introduction Amersfoort Vathorst: new residential buildings with CHRV-systems installed. • Health complaints from 36 residences • Media attention • Research by Ministry of VROM and J.E. StorkAir So far no standard method has been developed to assess the quality of ventilation in residences.

  10. Project aim Standard protocol for lay persons to assess the functioning of the Central Heat Recovery Ventilation System related to air quality

  11. Outline • Introduction • Project aim • Plan of approach • Hazard analysis • Experiments • Protocol • Conclusions • Recommendations • Questions

  12. Plan of approach Hazard Analysis of Critical Control Points (HACCP): systematic analysis of health risks in a production chain • Production chain: ventilation system • Product: indoor air quality

  13. Plan of approachHazard Analysis of Critical Control Points • Hazard analysis • Identification of Critical Control Points • Development of standards and monitoring procedures • Development of a standard measurement protocol (aim)

  14. Hazard analysis Main hazard: insufficient ventilation capacity Critical Control Points • Filter cleaning/replacement • System settings • Valve settings/cleaning Other Critical Points • Outdoor air quality • Wrong valve placing • Installation (ducts/door slits)

  15. Hazard analysis Valve placing simulations

  16. Hazard analysis Valve placing simulations

  17. Hazard analysis Main hazard: insufficient ventilation capacity Critical Control Points • Filter cleaning/replacement • System settings • Valve settings/cleaning Other Critical Points • Outdoor air quality • Wrong valve placing • Installation (ducts/door slits)

  18. Hazard analysis Duct system

  19. Hazard analysis Main hazard: insufficient ventilation capacity Critical Control Points • Filter cleaning/replacement • System settings • Valve settings/cleaning Other Critical Points • Outdoor air quality • Wrong valve placing • Installation (ducts/door slits)

  20. Hazard analysis Measurements to verify Critical Control Points Indicators of system performance • Airflow • Determination of overall ventilation capacity • Determination of air distribution • Air temperature • Performance heat exchanger • Indicates plugging of heat exchanger • CO2 • Overall high CO2 concentration = insufficient ventilation • Dead areas

  21. Outline • Introduction • Project aim • Plan of approach • Hazard analysis • Experiments • Protocol • Conclusions • Recommendations • Questions

  22. Experiments Airflow measurements • Flowfinder (amount of air per second) • At each valve (inlets and outlets)

  23. Experiments Temperature measurements • Temperature sensor • At each valve (inlets and outlets)

  24. Experiments CO2 measurements • Gas analyzer can be used • Only in living room at different positions

  25. Experiments in Eindhoven Measurements only in living room and kitchen Required airflow: 0.9 * Arealivingroom and kitchen This room: Area = 49 m2 Airflowreq = 44.1 dm3/s

  26. Experiments in Eindhoven

  27. Outline • Introduction • Project aim • Plan of approach • Hazard analysis • Experiments • Protocol • Conclusions • Recommendations • Questions

  28. Measurement Protocol

  29. Measurement Protocol

  30. Conclusions • As a result of a HACCP analysis, a protocol has been set up to determine the health risks and air quality in dwellings, related to the CHRV system. • Bad installation seems to be the biggest problem of the system. • Laws and regulations have not yet been adequately adapted to the implementation of the CHRV system in dwellings.

  31. Recommendations • The protocol should be tested by a lay person • Sound measurements should be developed further when regulations on this subject have been applied. • More research on accurate threshold values. • More specified equipment selection. • Laws and regulations on different matters should be developed (e.g. CO2 levels, noise, system calibration) and existing regulations should be more clear. • Improvement of instructions and information for the user.

  32. Acknowledgements • Annelies van Bronswijk • Henk Leegwater • Jetse Reijenga • Inge van der Meulen • Rick Bruins

  33. Questions