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Author Topic: Energy Efficiency: The “First Fuel”  (Read 40704 times)

Sigmetnow

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Re: Energy Efficiency: The “First Fuel”
« Reply #200 on: September 23, 2018, 09:45:02 PM »
“This seems to do everything the other smart thermostats like "Nest" do plus a whole lot more.”

Smart air vents!  That makes a lot of sense.  Room-level temperature control, without wiring up additional thermostats.  I bet this or something like it will soon be industry standard.
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jacksmith4tx

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Re: Energy Efficiency: The “First Fuel”
« Reply #201 on: September 23, 2018, 10:20:23 PM »
Amazing number of sensors in this system. We should stuff one into a cube-sat!
<Insert joke here> ;D

Let's not overlook this is <almost> the ultimate surveillance device too. Thermal/audio/air quality/humidity/air pressure/?? If the right kind of thermal sensors are used then it can 'see' in IR so it's even a camera too.
I might want to wait till you can be sure your data is protected and can't be shared.
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TerryM

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Re: Energy Efficiency: The “First Fuel”
« Reply #202 on: September 23, 2018, 10:36:25 PM »
“This seems to do everything the other smart thermostats like "Nest" do plus a whole lot more.”

Smart air vents!  That makes a lot of sense.  Room-level temperature control, without wiring up additional thermostats.  I bet this or something like it will soon be industry standard.


Remember that the return air side of the system is as important as the vents controlling where the conditioned air goes. What goes out, must be returned.
Installations are designed to balance the air flow between the outflowing ducts and the return grill/duct. If the air flow is restricted in either direction freeze ups in the summer and excessive energy use during winter will occur.


Unless the ducting is far larger than optimum, restricting the ducting/vents without modifying the return air system will not improve efficiency, and will put additional strain on the system, particularly during the cooling season.


Please get advice from a trusted HVAC contractor before doing any DIY modifications, especially if warantees are involved.
Terry

Sigmetnow

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Re: Energy Efficiency: The “First Fuel”
« Reply #203 on: September 24, 2018, 02:05:07 PM »
“This seems to do everything the other smart thermostats like "Nest" do plus a whole lot more.”

Smart air vents!  That makes a lot of sense.  Room-level temperature control, without wiring up additional thermostats.  I bet this or something like it will soon be industry standard.


Remember that the return air side of the system is as important as the vents controlling where the conditioned air goes. What goes out, must be returned.
Installations are designed to balance the air flow between the outflowing ducts and the return grill/duct. If the air flow is restricted in either direction freeze ups in the summer and excessive energy use during winter will occur.


Unless the ducting is far larger than optimum, restricting the ducting/vents without modifying the return air system will not improve efficiency, and will put additional strain on the system, particularly during the cooling season.


Please get advice from a trusted HVAC contractor before doing any DIY modifications, especially if warantees are involved.
Terry

Good points.  Although given the $100+ cost, it’s not likely you’ll be slapping them into every vent in every room any time soon. ;)


Quote
Let's not overlook this is <almost> the ultimate surveillance device too.
The location service in a cell phone or tablet is already accurate enough to use to determine when someone moves to a different part of their house, so we gave up that kind of privacy a long time ago.  But yes, improving the security of the Internet of Things is long overdue.
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SteveMDFP

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Re: Energy Efficiency: The “First Fuel”
« Reply #204 on: September 28, 2018, 05:57:10 PM »
This item is effectively a potential form of energy efficiency, by keeping buildings cooler in warm weather with zero energy cost:

Cool polymer paint saves on air conditioning
https://physicsworld.com/a/cool-polymer-paint-saves-on-air-conditioning/

"Air conditioning accounts for 10% of global energy consumption. Now researchers at Columbia University and Argonne National Laboratory in the US have produced a polymer “paint” capable of cooling surfaces to around 6 °C below ambient temperatures without using any energy at all. Used in combination with conventional air conditioning, it could allow significant reductions in the time these units are switched on, as well as providing some cooling relief in areas where air conditioning is not so widely available."
--------------------------------------------------------------------------

In usage, it's a simple transparent polymer paint, with nanoparticles of ordinary water.  After application, the water slowly evaporates, creating microscopic air voids.  By "tuning" the air voids, the dried paint becomes reflective of visible light and near-infrared, while being a black body for longer-wave heat radiation.

They say that adding some pigments has minimal effect on performance.  One could paint southern-facing walls and roofs, keeping the building significantly cooler.

If cheap enough, I could envision painting roads and sidewalks, to reduce urban heat island effects.

etienne

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Re: Energy Efficiency: The “First Fuel”
« Reply #205 on: September 28, 2018, 06:20:16 PM »
This cooling paint is interesting, but what about the winter ? This is always the problem in many areas. I have on my windows a filter to keep infrared radiation inside, in offices, it is used to keep the infrared outside. All these systems without energy are difficult to manage.

sidd

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Sigmetnow

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Re: Energy Efficiency: The “First Fuel”
« Reply #207 on: December 11, 2018, 06:10:11 PM »
From the grid’s point of view, choosing to NOT use energy from the grid at a particular point in time... is the same as feeding energy into the grid and simultaneously consuming it.

How the Humble Home Water Heater Could Play a Big Role in Energy Storage
Quote
One concept that often trips people up when thinking about using water heaters as batteries is that water heaters are not, in fact, batteries. An electric vehicle has a battery, so it’s easy to see how an EV could be used to take, and give back, energy to the grid. Scale that up to millions of vehicles, and now you have a very large battery to charge up, or discharge, at opportune times.

But how does this work with a humble appliance, like a water heater? Moreover, in the PGE-BPA study, the majority of the 600 test events consisted of a signal sent to customer water heaters to simply not start heating. “Don’t heat now!”—says the signal (by the way, we’’ll heat you up a bit later). To most, this may sound minor. After all, the water heater is not, in fact, putting energy back into the grid. But, it might as well be.

“You see, this has the exact same effect as an actual battery,” Eustis said. “I mean, what do you do with a battery? You choose when you put energy in, and you choose when you take it out. So simply choosing not to use as much energy is equivalent to taking energy out of a battery. The heater goes cold. Later, when we have that cold water at hand, we can choose to put excess energy back in from the grid, from solar for instance, to heat it up. From the viewpoint of the grid, it’s identical to a battery.” In other words, a fleet of water heaters can be used as a virtual battery. ...
https://www.routefifty.com/smart-cities/2018/12/water-heaters-power-grid-storage/153391/
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etienne

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Re: Energy Efficiency: The “First Fuel”
« Reply #208 on: December 12, 2018, 09:18:44 PM »
From the grid’s point of view, choosing to NOT use energy from the grid at a particular point in time... is the same as feeding energy into the grid and simultaneously consuming it.

How the Humble Home Water Heater Could Play a Big Role in Energy Storage
Quote
One concept that often trips people up when thinking about using water heaters as batteries is that water heaters are not, in fact, batteries. An electric vehicle has a battery, so it’s easy to see how an EV could be used to take, and give back, energy to the grid. Scale that up to millions of vehicles, and now you have a very large battery to charge up, or discharge, at opportune times.

But how does this work with a humble appliance, like a water heater? Moreover, in the PGE-BPA study, the majority of the 600 test events consisted of a signal sent to customer water heaters to simply not start heating. “Don’t heat now!”—says the signal (by the way, we’’ll heat you up a bit later). To most, this may sound minor. After all, the water heater is not, in fact, putting energy back into the grid. But, it might as well be.

“You see, this has the exact same effect as an actual battery,” Eustis said. “I mean, what do you do with a battery? You choose when you put energy in, and you choose when you take it out. So simply choosing not to use as much energy is equivalent to taking energy out of a battery. The heater goes cold. Later, when we have that cold water at hand, we can choose to put excess energy back in from the grid, from solar for instance, to heat it up. From the viewpoint of the grid, it’s identical to a battery.” In other words, a fleet of water heaters can be used as a virtual battery. ...
https://www.routefifty.com/smart-cities/2018/12/water-heaters-power-grid-storage/153391/
Ok if you use it that way. But you should not overheat the water heater because insulation has been calculated for a specific temperature, and when you are above that temperature, losses get too high.

Sigmetnow

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Re: Energy Efficiency: The “First Fuel”
« Reply #209 on: December 18, 2018, 06:05:30 PM »
The European Union has a target of making all new buildings zero-energy by 2020, but in Norway, carbon neutrality isn’t enough.  A consortium in Oslo made up of architects, engineers, environmentalists, and designers is creating energy-positive buildings in a country with some of the coldest and darkest winters on Earth. “If you can make it in Norway, you can make it anywhere.”

Norway Is Fighting Climate Change With Architecture
Quote
In 2019, the collective’s biggest project to date will be opened to the public: Powerhouse Brattørkaia, in the central Norwegian city of Trondheim.

Brattørkaia is an eight-story office building that will produce 485,000 kWh annually. For reference, the average Norwegian home uses about 20,000 kWh of power a year. (In the U.S., the yearly household average is 10,399 kWh). Brattørkaia will, in effect, become a mini-power plant that can supply electricity to Norway’s publicly owned grid.

Its surplus energy will also compensate for the power used to produce its building materials. That, says Snøhetta architect Jette Hopp, is unique; prevailing definitions for energy-positive buildings don’t include materials’ embodied energy.

Hopp says accounting for that energy makes for a more complex development process. Recycled materials are favored above all. New materials are diligently traced. The design process is front-loaded with engineering expertise. Alliance members work together to make sure every design choice has a dual purpose. “Nothing is by coincidence,” says Hopp.

“We try to give things multiple functions, and that directly leads to less embodied energy since we don’t have to double or triple up systems. That’s in the smart thinking—but you need to have the knowledge of all the different layers of infrastructure works in order to find synergies.”  ...
https://www.citylab.com/environment/2018/12/norway-energy-positive-building-powerhouse-snohetta/577918/
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vox_mundi

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Re: Energy Efficiency: The “First Fuel”
« Reply #210 on: December 19, 2018, 08:47:28 PM »
One of those unanticipated consequences of energy efficiency ...

Missouri Woman's Tiny House Reported Stolen, Then Found Days Later 30 Miles Away
https://www.nbcnews.com/news/us-news/missouri-woman-s-tiny-house-was-reported-stolen-then-found-n949866


https://twitter.com/SheriffMarshak/status/1075420947677671424

... maybe could use some PV panels on the roof.

-----------------------------

Driving to the South Pole in a Solar Powered Electric Vehicle Made of 3D Printed Garbage
https://www.wired.com/story/3d-printed-solar-powered-snow-rover/

Quote
... The electric vehicle is powered by 10 solar panels, which eke out enough energy to propel it forward at up to 5 mph. The plan is for the Ter Veldes to take turns driving their plastic contraption 24 hours a day, sleeping in shifts. With no heating elements inside the rover—all the solar energy goes to forward locomotion—temperatures may plummet well below zero. That’s part of the experience. “There is joy in the discomfort,” Edwin says. If all goes well, the plastic pirates will complete their journey in early January.
Quote
Update: Solar Voyager forced to abandon mission ... despite it being Antarctica’s summer, unexpected heavy snow has meant progress has been slow, and now the team have had to turn around.
https://www.bbc.com/news/video_and_audio/headlines/46614102/weather-stops-plastic-waste-car-reaching-south-pole



Solar Voyager forced to abandon mission? - That wouldn't cut it on Mars ...


The Martian - 2015
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Sigmetnow

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Re: Energy Efficiency: The “First Fuel”
« Reply #211 on: December 29, 2018, 07:48:56 PM »
Quote
it took 1000s of years to get the amount of work to create light down to trivial amounts so everyone could use it

it took just 10 years to fuck it up and need a few megawatts of servers to turn one bulb on from the couch
https://twitter.com/internetofshit/status/1078428201104408576
Comments at the link: ::)
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