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Messages - cmcgugan

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Policy and solutions / Re: Batteries: Today's Energy Solution
« on: September 13, 2019, 08:09:16 PM »
Interest Is Rising in Energy Storage for Building Resiliencehttps://www.navigantresearch.com/news-and-views/interest-is-rising-in-energy-storage-for-building-resilience.
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Recent extreme weather events and natural disasters, such as hurricanes Harvey and Irma, draw attention to a new use case in commercial building retrofits for building resilience and independence. Natural disasters are only expected to grow in frequency and severity because of climate change. One of the key effects of these events are power outages, as seen in Puerto Rico. Building owners are taking note of this new threat and looking at energy storage and solar plus storage solutions for their building portfolios.
Batteries or other forms of energy storage can be used to make buildings more resilient to grid outages especially when combined with renewable energy generation such as PV. In the building design and operation fields there is a growing awareness that while "Green" buildings can help reduce energy use and CO2 production, we also need to prepare buildings for a more extreme climate.

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Science / Re: A list of missing feedbacks
« on: August 27, 2019, 05:28:12 PM »
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The optimal ambient operating temperature for a human body in a low activity state is about 20C-24C. Hotter than that, the body has to redirect resources to cool the body, impairing higher cognitive functions.

I'm thinking about our African origins and don't understand the above stated optimal temperature range.
Thermal comfort for humans is based on environmental factors including air temperature, humidity, air movement and radiation from hot and cold surfaces plus body conditions including metabolic rate (how much heat you are generating) and clothing level.  A good tool for predicting comfort can be found at https://cbe.berkeley.edu/project/thermal-comfort-tool/ . In general, the more control people have over their environment, the greater temperature range they will tolerate.  People in sealed buildings expect conditions to be controlled close to setpoints.  People in buildings with operable windows are happy with a wider range of conditions.

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Consequences / Re: Decline in insect populations
« on: September 04, 2018, 07:17:18 PM »
Monarch Butterflies (Danaus plexippus ) are migrating south along the east shore of Lake Huron in Ontario Canada. For the last few years the migration here seemed to be single butterflies, about 1 per minute at peak.  On a positive note this year there are groups of two to five butterflies travelling together.  We have had a warm wet late summer, so that may be helping them along. They have a long trip to Mexico ahead of them.

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Policy and solutions / Re: Renewable Energy
« on: July 18, 2018, 04:55:44 AM »
Landfill gas contains siloxanes which are used in cosmetics.
"Siloxanes are a group of man-made organic compounds that can differ in composition. They are frequently found in cosmetic and personal hygiene products, health care, food ingredients, plastics and other industrial products.
Increased usage leads to increased presence in landfill and wastewater processing facilities. When biogas containing siloxanes is combusted, i.e. in a boiler, turbine, generator, or CHP unit, silicone dioxide (SiO2) particles – essentially sand – are created and contaminate engine and exhaust components downstream. " Source: http://www.dcl-inc.com/pdf/siloxane-cleanup/DCLA-Siloxane_Removal_Technology.pdf

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Consequences / Re: Climate change, the ocean, agriculture, and FOOD
« on: June 15, 2018, 02:33:42 PM »
Looks like tractors will probably go the hybrid route first before going fully electric https://www.country-guide.ca/2018/02/14/are-electric-drive-tractors-ready-to-move-past-the-concept-stage/52584/. The hybrid could be partially run on biodiesel for sustainability.

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