Open Source Ecology - hvacr-stuff

Is this an active channel? Is anyone against archiving this channel and restoring it if needed?

https://en.wikipedia.org/wiki/High_efficiency_glandless_circulating_pump

High efficiency glandless circulating pump

A high efficiency glandless circulating pump is a component of a heating and air conditioning system that allows the system to perform with increased efficiency while significantly reducing the system's electrical usage.

5:00 AM

https://en.wikipedia.org/wiki/Radiator_reflector

Radiator reflector

A radiator reflector is a thin sheet or foil applied to the wall behind, and closely spaced from, a domestic heating radiator. The intention is to reduce heat losses into the wall by reflecting radiant heat away from the wall. It is a form of radiant barrier and is intended to reduce energy losses and hence decrease fuel expenditure.

5:01 AM

would some metalized film like Mylar work for that underneath the hydronic floor perhaps? I need to look into the specifics of how all that works

Used metalized bubble wrap type insulation in open or crawl spaces under floors. Not sure what is used on floor on grade. Probably a closed cell urathane base maybe metalized.

Would anyone here have any recommendations for open source software for Manual J, Manual S, or Manual D calculations? They are ways of calculating HVAC loads to size the system to your needs, increasing comfort & reducing waste.

2:14 PM

http://hpc2017.org/wp-content/uploads/2017/05/O.2.2.5-Evaluation-of-combining-an-air-to-water-heat-pump-with-a-stove-with-water-pocket-for-residential-heating.pdf

Deleted User

http://hpc2017.org/wp-content/uploads/2017/05/O.2.2.5-Evaluation-of-combining-an-air-to-water-heat-pump-with-a-stove-with-water-pocket-for-residential-heating.pdf

Research Paper Comparing Multi Fuel Heating Including Wood Furnaces, which can be run as a backup with an air source heat pump. (edited)

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2:18 PM

https://www.youtube.com/c/EnertechUniversity/about

Enertech University

At Enertech University, we're continuously working to advance our training program to give technicians and sales representatives the edge in the geothermal and solar industry. That's what it's all about; helping those in the industry do their jobs with high-efficiency products, have more satisfied customers, grow their business, and work towards...

Deleted User

https://www.youtube.com/c/EnertechUniversity/about

Great Learning resource. Also Enertech has a hvac factory in South Dakota, is the defacto US leader in Ground Source Heath Pumps (GCHP) which when properly designed is ~300% efficient when compared to a gas/electric boiler/furnace at ~96%

@Deleted User has reached level 2. GG!

https://www.arcticheatpumps.com/heat-pump-with-solar.html

Air Source Heat Pump and solar water heating combined

Arctic Heat Pumps offers high performance air source heat pump and hydronic heat pump for cold climate. Very effective in producing energy. Add to cart now!

Deleted User

https://www.arcticheatpumps.com/heat-pump-with-solar.html

Canadian company responsible for pushing the envelope with air source heat pumps in cold or colder climates & dramatically lowering the minimum temperature at which it is still possible to pull heat from below freezing outside air & put that heat inside the building envelope. Lots of great infographics. (edited)

https://youtu.be/TJNCDVAaPzg

Matt Risinger

4 Methods To Run Radiant Heat PEX Pipe

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3:22 AM

Using that grid thing in the upper right corner of the thumbnail and embedding it in concrete was a really neat method they mentioned.

3:22 AM

Granted i want to know if/when and how those hydronic radiant heating loops fail

Deleted User

Research Paper Comparing Multi Fuel Heating Including Wood Furnaces, which can be run as a backup with an air source heat pump. (edited)

I’m on mobile right now so can’t do much but i need to dive into that later, it seems really neat.

Eric Lotze

https://youtu.be/TJNCDVAaPzg

That grid system is super cool, I believe it has the lowest profile when you need insulation (for on slab on grade installation or when you don't want omi-directional energy transfer). I haven't been able to find anything that shows failure rates of pex; my take is it is a generalized fear of the unknown associated with a "new" (50+ year) technology with no way to repair if it does got bad. I would argue if it does go bad you could just use a new hydronic fan coil or radiator. Somewhere there is a standard plate for flooring that is sound proof, which is basically osb board and then 2" of concrete. Being able to make a floor your HVAC system, soundproofing, & structural load bearing seems like an amazing triple threat optimization, particularly if they manage to make the concrete an electric battery or make it out of hempcrete (hempcrete can't be loadbearing but can carbon sequester, insulate, & thermal battery) for a fourth. (edited)

@Deleted User has reached level 3. GG!

https://www.scientificamerican.com/article/concrete-buildings-could-be-turned-into-rechargeable-batteries/

Concrete Buildings Could Be Turned into Rechargeable Batteries

But for now, a square meter of the building material holds roughly the energy of two AA batteries

Deleted User

That grid system is super cool, I believe it has the lowest profile when you need insulation (for on slab on grade installation or when you don't want omi-directional energy transfer). I haven't been able to find anything that shows failure rates of pex; my take is it is a generalized fear of the unknown associated with a "new" (50+ year) technology with no way to repair if it does got bad. I would argue if it does go bad you could just use a new hydronic fan coil or radiator. Somewhere there is a standard plate for flooring that is sound proof, which is basically osb board and then 2" of concrete. Being able to make a floor your HVAC system, soundproofing, & structural load bearing seems like an amazing triple threat optimization, particularly if they manage to make the concrete an electric battery or make it out of hempcrete (hempcrete can't be loadbearing but can carbon sequester, insulate, & thermal battery) for a fourth. (edited)

On the note of Hempcrete, what about Carbon Fiber From Sustainable Rayon-Crete Reinforcement? Hemp CCS on Steroids!

10:04 PM

Thermal Batteries are Neat

10:04 PM

Have you ever worked with Ground Source Heat Pumps etc?

Eric Lotze

On the note of Hempcrete, what about Carbon Fiber From Sustainable Rayon-Crete Reinforcement? Hemp CCS on Steroids!

https://www.builderspace.com/is-hempcrete-stronger-than-concrete

BuilderSpace

Is Hempcrete Stronger Than Concrete? - BuilderSpace

Hempcrete is not stronger than concrete. It lacks the comprehensive strength associated with concrete as it’s lightweight and not dense. However, hempcrete is said to be a carbon sink, fire-resistant, pest-resistant, a strong insulator, stores, and releases moisture.

I'm thinking either carbon fiber rod rebar, or carbon fiber mesh/matting being used in a similar manner to "ferroconcrete". I think the main limit is cost.

Eric Lotze

Have you ever worked with Ground Source Heat Pumps etc?

I haven't. I have been researching GSHP on & off for the last few years. I just got access to Kavanaugh tools/research primarily GSHPCalc, which is now free ware since he retired, https://geokiss.com/free-design-software/ has more great free tools. https://www.coolcalc.com/, seems like a good Manual J calculator. https://looplinkrlc.com seems pretty good. Both sites have trials you have to click through to make it work. https://www.geoanalyst.net/ has been depreciate by a cost value replacement by Enertech but they will only give access to their middle men. Rhvac has high reviews. (edited)

admin

Free Software

GeoAnalyst

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Do you have a wiki account yet?

Yeah under the user name "Maty"

ah okay!

Everything I have read argues $1 per $1, building new or remodeling to Passive House standards is a far more effective cost value approach compared to any combination of hvac. And then after you have a Passive House building, there is little point to expensive hvac systems for a roi. From a carbon perspective the US is shooting for 2030 to have all our energy come from solar at a price of $0.02/kwh, (right now I pay $0.11/kwh for wind with nuclear & coal back up). Still, I have been thinking about being apprentice for 3 years and then buying a drilling rig & going into the GSHP business. I think over the next 100 years Passive House & GSHP will be critical to terraforming the planet while maintain a high quality life.

What does the retrofit process look like? I thought it could really only be done with new buildings due to all the house wrap / sealing needs etc?

One wall, one side of the house, or a floor at time, removing all thermal bridges & creating an air tight seal. Or all at once, a striped to studs, top down remodel, would be more efficient (edited)

https://www.leti.london/retrofit

Climate Emergency Retrofit Guide | LETI

This guide shows how we can retrofit our homes to make them fit for the future and support the UK’s Net Zero targets. We define energy use targets for existing homes and provide practical guidance on how to achieve them. The guide is useful for architects, engineers, Local Authorities, social landlords, energy professionals, contractors and cl...

I believe there is a quote that goes “95% of the US housing supply was built before 1950”

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Deleted User

I believe there is a quote that goes “95% of the US housing supply was built before 1950”

I believe it. I haven’t found a house in Detroit that wasn’t built between 70 and 100 years ago. The carpentry and craft, and also incredibly dark old growth hardwood, is mind boggling

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4:42 PM

I feel like most modern contracting or home remodeling that’s done is so easy in comparison.

https://www.fiverr.com/inbox/valuepassive

6:05 PM

They are a Ukrainian Architect living in Wales that does full Passive House design for $200. (edited)

Way to overthrow Putin with architecture ! Hardly the promised $5 tho

@learner-long-life has reached level 11. GG!

learner-long-life

Way to overthrow Putin with architecture ! Hardly the promised $5 tho

inflation ruins everything... except debt

5:35 PM

FYI Nibe own Entertech, & pretty much every other speazlized GSHP manufacture in the us https://www.nibe.com/investors/pm-news-acquisitions-other/2014---news-acquisitions-other/2014-11-07-nibe-acquires-remaining-90-of-north-american-heat-pump-firm-enertech-global-llc (edited)

NIBE acquires remaining 90% of North American heat pump firm Enerte...

5:40 PM

The nibe s1255 looks so much better than anything I am seeing in the states. They seem to prefer absconding the data, it is a nightmare trying to compare the different models for btu/h capacity, efficiency, $, & Home Assist Support.

https://www.gshp.org.uk/GSHPs_District_Heating.html

Ground Source Heat Pumps in District Heating | Heat Networks | Dist...

GSHPs in District Heating | Ground Source Energy | Ground Source Heat Pumps | GSHPA

6:58 PM

I think I am going anti decentralization on cities & instead want to double down an mass civic cooperation for city scale ground source heat pumps for district energy.

Deleted User

inflation ruins everything... except debt

Fiver must be using 1970 dollars

Deleted User

I think I am going anti decentralization on cities & instead want to double down an mass civic cooperation for city scale ground source heat pumps for district energy.

I’m all for using this massive thermal sink we live on. Who are the stakeholders in cities? How would we engage them or Mabel them to engage each other?

Deleted User

https://www.gshp.org.uk/GSHPs_District_Heating.html

Well most cities water supplies are natural massive ground source heat and cold sources, that is why the water doesn't freeze and doesn't get too hot.

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yfgame

Well most cities water supplies are natural massive ground source heat and cold sources, that is why the water doesn't freeze and doesn't get too hot.

Ya heat capacity of water is very advantageous. In upstate NY, near Beacon, we went swimming in the city reservoir once in summer, very refreshing

10:02 PM

I’m not sure it was strictly approved by city officials tho, I hope they filter that reservoir

learner-long-life

I’m not sure it was strictly approved by city officials tho, I hope they filter that reservoir

Yes they do, They process all of the water post reservoir. Since all kind of things can get in there.

yfgame

Yes they do, They process all of the water post reservoir. Since all kind of things can get in there.

Yeah, like dogs and tourists

learner-long-life

Ya heat capacity of water is very advantageous. In upstate NY, near Beacon, we went swimming in the city reservoir once in summer, very refreshing

I have been seeing a lot of very cheap Victorians in up state new york going for sub $100k

https://www.buildwithrise.com/stories/spray-on-and-liquid-vapor-barriers

Spray-On Vapor Barriers: The Next Big Thing?

Instead of going the usual route with building wrap, many are opting for closed-cell spray foam or liquid, spray-on vapor barriers. What will you do?

Let me grab a video link, they were mentioning something similar

New game in town DSHP, Dual Source Heat Pumps, a pump that will work with either / & / or / both a Air Source Heat Exchanger + Ground Source Heat Exchanger. So you could start replacing your existing system with a smooth DSHP & Air Source Heat Exchanger & then 10 years from now realize Polar Vortex are no joke & add in a Ground Source Heat Exchanger.

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https://youtu.be/D-PWbIbN0ao?t=400

Passivhaus Portugal

9ª Conferência Passivhaus Portugal 2021 - Sessão 3

3:05 AM

Came across it here:

3:05 AM

https://discord.com/channels/586676777334865928/953638593077846081/997466204656640051

https://architizer.com/projects/zero-energy-building-at-bca-academy/

Zero Energy Building at BCA Academy by DP Architects

For more than four decades, DP Architects (DPA) has been dedicated to ensuring architecture is designed and built to enrich the human experience and spirit. ...

6:51 PM

Neat content for the OBI Aesthetics page too, not just Passive Ventilation

6:51 PM

https://www.sciencedirect.com/science/article/abs/pii/S0196890413005281

Optimization design of solar enhanced natural draft dry cooling tower

This paper proposed an optimization scheme for solar enhanced natural draft dry cooling tower design, in which a detailed cost model was proposed incl…