Search found 31 matches

by unklegrumpknee
Apr 03 2019 8:55pm
Forum: Alternative Energy
Topic: Energy storage
Replies: 12
Views: 979

Re: Energy storage

The latent heat of water is 144 BTU/lb
1 degree F raise in temp requires 1 BTU
A lot of the PCM'S are about half.
So that one pound melting is equal in storage to 72 lbs of water changing one degree,
by unklegrumpknee
Apr 03 2019 8:43pm
Forum: Alternative Energy
Topic: Energy storage
Replies: 12
Views: 979

Re: Energy storage

Exactly Amberwolf thermal mass. Constant temperature thermal mass. Which is even better.
by unklegrumpknee
Apr 03 2019 5:52am
Forum: Alternative Energy
Topic: Energy storage
Replies: 12
Views: 979

Re: Energy storage

B. Said Not for A/C systems. They need a more significant temperature difference for effective cooling. It is not being used for cooling, it is used to store the cold. Like industrial freezer packs The greater the temperature difference between your storage (thermal mass) and the useage temperature,...
by unklegrumpknee
Apr 02 2019 7:35pm
Forum: Alternative Energy
Topic: Energy storage
Replies: 12
Views: 979

Re: Energy storage

B. Said Not for A/C systems. They need a more significant temperature difference for effective cooling. It is not being used for cooling, it is used to store the cold. Like industrial freezer packs The greater the temperature difference between your storage (thermal mass) and the useage temperature,...
by unklegrumpknee
Mar 15 2019 12:42pm
Forum: Alternative Energy
Topic: Energy storage
Replies: 12
Views: 979

Re: Energy storage

Thanks Bill What they offer is not new technology. The use of ice has been practiced for a long time. That's where the term ton of air conditioning started. A ton of ice a day. A very dense storage system. But think, doesn't it make more sense to store the energy at a temp closest to it's use. No ad...
by unklegrumpknee
Mar 14 2019 8:29am
Forum: Alternative Energy
Topic: Energy storage
Replies: 12
Views: 979

Energy storage

It doesn't have to be a battery!!!! Phase change material. Better yet Bio PCM. Look at phasechange.com Using this system one can use off peak power for air conditioning at a time when the outside temperature is less getting more " Cold for the buck" Virtually unlimited cycle life. The company has in...
by unklegrumpknee
Feb 16 2019 7:09pm
Forum: Alternative Energy
Topic: Help converting an RV house battery to lithium
Replies: 11
Views: 1391

Re: Help converting an RV house battery to lithium

Has anyone considered using 3s lithium with a large diode and charged separately. Connected to a lead acid battery?
Under a large load the lithium could support the sla reducing the Peukert effect?
by unklegrumpknee
Feb 16 2019 9:38am
Forum: Items for Sale - Used
Topic: Chevy Volt individual Cells FOR SALE. 10C 15Ah
Replies: 47
Views: 3847

Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Just wondering. If you test a 3p cluster as a single battery and it acts like it is three times the capacity of the single cell, wouldn't that mean all cells are okay?

I am interested in some for both my ebike and more importantly an off grid camp.

Thanks
by unklegrumpknee
Feb 15 2019 4:01pm
Forum: Alternative Energy
Topic: Help converting an RV house battery to lithium
Replies: 11
Views: 1391

Re: Help converting an RV house battery to lithium

Thanks for the info. I am also wanting to upgrade my Pv system in a little camp. This is good info.
by unklegrumpknee
Aug 12 2018 10:52am
Forum: Alternative Energy
Topic: solar battery advice needed.
Replies: 28
Views: 2426

Re: solar battery advice needed.

jimmy

brilliant idea about upping mining.
Or diversify on a third computer.
by unklegrumpknee
Aug 11 2018 9:28pm
Forum: Battery Technology
Topic: SLA Maintenance - Science vs BS?
Replies: 14
Views: 628

Re: SLA Maintenance - Science vs BS?

they are ten years old and were even run quite dry. Never equalized. I'm running on a wheelchair battery now used when I got it. Either you maintain them or not only kinda extends capacity life and not Chronological life. I chose to go with a high capacity and milk them down. Maybe I should just go ...
by unklegrumpknee
Aug 10 2018 7:19am
Forum: Battery Technology
Topic: SLA Maintenance - Science vs BS?
Replies: 14
Views: 628

Re: SLA Maintenance - Science vs BS?

I used the" get a really big battery and small solar cell and just use them up" method. Lasted 8 years. 4 trojan T-105's and a 60 watt solar cell through a 20 amp controller. I would really appreciate any info on lithium replacement. Need 200 amp peak C to power purchased used 1000w full sine wave i...
by unklegrumpknee
Aug 03 2018 8:57am
Forum: E-Bike General Discussion
Topic: What do you all think about Croudfunding?
Replies: 7
Views: 660

Re: What do you all think about Croudfunding?

Just a thought rattling in this old head. What if you tried a design for a driver and 1 or2 passenger transporter. If it could be kept under 100 pounds it would be legal in a lot of this country. 750 Watt motor. Is it possible? A good market maybe exists for this. Fair goers, nursing home transporta...
by unklegrumpknee
Jul 25 2018 4:59am
Forum: Alternative Energy
Topic: increase static solar panel efficiency/output?
Replies: 16
Views: 1373

Re: increase static solar panel efficiency/output?

Out of the box.

Might you possibly invest time money and effort in more energy efficient appliances?
Reducing consumption is equivalent, no slightly above I feel, to augmenting generation.
by unklegrumpknee
Jul 25 2018 4:47am
Forum: Large EV General Discussion
Topic: Existing build and want to change battery chemistry
Replies: 3
Views: 1185

Re: Existing build and want to change battery chemistry

Excellent project. A couple reasons come to mind. Because of the Puekert sp effect, you can expect longer range from the exact same kilowatt hr of capacity if the weight were the same. It be much lighter extending the range even further. You should have enough room, that you can get even more capaci...
by unklegrumpknee
May 16 2018 7:11am
Forum: Alternative Energy
Topic: 6960 watts going down the road
Replies: 7
Views: 1535

Re: 6960 watts going down the road

Ben Franklin is credited with saying "a penny saved is a penny earned". No longer true. A penny saved is about 2 pennies earned!!! Income taxes, cost to earn money and all sorts of other things get you that second penny. And in your case maybe even a nickel. Congrats and thanks for sharing.h
by unklegrumpknee
Nov 05 2017 6:53am
Forum: E-Bike General Discussion
Topic: Cobalt processing plant, major part of our batteries
Replies: 1
Views: 413

Re: Cobalt processing plant, major part of our batteries

Thanks for the post. It does give one a great feeling to first be aware of this connection, then to be able to be the highest value contractor. Good luck.
Being the highest value contractor, you can save them money which will keep them in business at a price that will keep you in business as well.
by unklegrumpknee
Feb 11 2015 9:43am
Forum: Alternative Energy
Topic: wind generator for heat, no electric
Replies: 19
Views: 3256

Re: wind generator for heat, no electric

As far as energy storage goes water is good but I have been looking into phase change mediums. PCM for short. Here one is storing energy in the latent heat of melting. Storage vessel Size can be much reduced. The collector can be run at much lower temperature which would signifigantly increase effic...
by unklegrumpknee
Jan 09 2015 1:06pm
Forum: E-Vehicles General Discussion
Topic: Toyota Mirai - the fuel cell vehicle goes into production
Replies: 57
Views: 4724

Re: Toyota Mirai - the fuel cell vehicle goes into productio

Luke Converting natural gas, methane, to hydrogen is called reformation. Not stripping. It is an endothermic reaction ( absorbs energy ) If the energy required for this reaction could be supplied by solar thermal then the process can be very energy efficient. ICE efficiency is about 18 percent. Fuel...
by unklegrumpknee
May 16 2014 8:40am
Forum: Alternative Energy
Topic: What's the most efficient way to turn wood into electricity?
Replies: 31
Views: 8040

Re: What's the most efficient way to turn wood into electric

Make wood into methanol. Use methanol to power fuel cell. That, in my humble opinion, would be the most efficient way. Espesially if solar distillation is used. Excess methanol could be used to power an ICE.
by unklegrumpknee
Mar 09 2014 1:24pm
Forum: Alternative Energy
Topic: DC Rated Consumer unit's?
Replies: 4
Views: 1142

Re: DC Rated Consumer unit's?

Square D Qc breakers are rated for DC up to 50 volts. (As well as AC).
by unklegrumpknee
Dec 17 2013 12:40am
Forum: Alternative Energy
Topic: What a mess and it's going to be expensive to all of us
Replies: 27
Views: 6772

Re: What a mess and it's going to be expensive to all of us

One solution at least on a physical chemistry standpoint is fuel cell coupled solar reformation. Use the energy of the sun to change methane to hydrogen, this ie called reformation. CO2 is still a byproduct but the energy available is almost half again that of using the natural gas in any other way....
by unklegrumpknee
Dec 05 2012 6:26am
Forum: Alternative Energy
Topic: BMS as solar panel charge controller ?
Replies: 32
Views: 8242

Re: BMS as solar panel charge controller ?

I've been trying to figure out charging scenarios with solar myself. I'm not an electrical enngineer, my degree is in chemical engineering, but as quoted elswhere "nothing gets invented until someone changes disciplines" gives me courage to post. Here's what I come up with. Use a 9 cell or so pv pan...