Monday, September 12, 2016: 4:00 PM-5:30 PM
Chair:
Wouter Borsboom, TNO
1 Developing a Test Method for Kitchen Range Hood Capture Efficiency
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Iain Walker, Ph.D., Lawrence Berkeley National Laboratory |
Cooking has a major impact on IAQ and is a significant source of pollutants in a home, including odors, moisture and pollutants with health impacts, such as particles, CO and NOx. This session discusses the development of a new laboratory-based capture efficiency testing standard and look in detail at the experimental data used in the creation of the standard. Key parameters effecting capture efficiency will be examined that have impacts on the design, use and installation of range hoods.
2 Case History: Visual Feedback Reduces Marital Stress and Allows IAQ Improvement
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Lew Harriman, Mason Grant |
After three decades of the zero exhaust effectiveness of two microwave-range exhaust hoods, the author installed a range hood that has an industry-leading noise rating, and also removes particulate effectively. But that did not mean the chef would use it. The noise was new, and very unwelcome. Aromas from cooking are an essential element in the superb results that this chef achieves. But real-time quantitative visual feedback showed the magnitude of particulate removal from the breathing zone, prompting a change in cooking habits in spite of the still-highly-objectionable 3 sone noise rating of the hood.
3 Exposure on Particulate Matter in Real Cooking Situations, and Can We Reduce It?
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Wouter Borsboom, TNO |
Presenters have measured the exposure of particulate matter of 10 dwellings during a week, and monitored typical cooker configurations, range hoods and exhaust flows. In a lab situation they built two kitchen configurations, making use of the results of the field study, to represent cooking on gas and induction. Capture efficiency was measured with tracer gas in both kitchens. With this data the presenters validated a CFD model for gas and induction cooking. These models are used to explore new range hood concepts with high efficiency.
4 Capture Efficiency of Range Hoods, an Industrial Perspective
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Daniel Forest, Venmar |
While the development of a standardized capture efficiency metric for rating the performance of residential kitchen exhaust systems has received slightly less media coverage than this year’s US presidential race, it will arguably have a greater long-term effect on our species’ quality of life. This presentation provides an overview of a ventilation product manufacturer’s experience with conducting capture efficiency tests using two methods, shadowgraph and tracer gas, under various conditions and will highlight lessons learned along the way.
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