Search results

water temp change per pound per Btu gas 212f to 212f gas = 970.4 btu liquid 32 f to 212f =1 btu liquid to solid 32 to 32 = 144 btu solid below 32f = 1/2 btu

Your only partially correct , the newer units measure the fan speed (load) to determine the defrost cycle . This way it includes all the air temp and the humidity levels . The evaporator temp goes sub zero F degrees . My addition would put another heat ( water) exchanger between the compressor...

A 250 amp at should only use 40 to 50 amp at full power at 230 V single phase. It sound like those batteries have a lot of useful life left in them . You have a choice to sell and buy a smaller bank or invest the extra in equipment for the experience with them and might only last a couple...

Great find , you need a 250 amp min fork lift charger. You should be able to pick up one reasonably . And they are recyclable.

You are correct on regular AC units m But heat pumps are designed to go below freezing to get the heat out of the sub 32F air. As long as you don't change what Freon the compressor was came with, It will work. Modifying the unit will void the warranty any how, but I did not specify the...

Your looking at this like a refrigerator freezer , water expands 10% in the process . In the freezer you're freezing the water from the outside in . if you freeze the the water from the inside to the outside , no isn't any outside wall expansion pressure , other than the water itself . As for...

1btu per pound degree F ---- 32 water to 212 144 btu's per pound -- 32F liquid to 32 F frozen 1/2 btu per pound --- 32F frozen and below A 2000 pound chunk of ice (250 gallons ) if used for 8 hours , that would be equivalent to a 3 ton unit. A RV wouldn't have a weight problem , but a space...

Unless you have a clear area already , Those trees around you provide a lot of cooling effect and wind damping in the winter . They will provide more kw's of savings , those panels ever will and their free. A panel on the roof for a backup battery power would charge up the backup in a week...

Just dropping this here for clarification. https://www.bluesea.com/resources/108/Electrical_Conductivity_of_Materials

There is only one stupid question ---- One that you do not ask . The quickest acquirement of knowledge is ask a lot questions.

I got even with mine and the rest of the bugs around my house and animals with diatomaceous earth. Works on everything , termites , ants and ear mite and fleas and is cheap and safer than most. JimJr

The 15a circuit is a continuous 15a( @1800 watts ) , a 1/2hp motor continuous draw is @ 375 watts of the total 880 watts , but 5 x 375 =1875 watts during the start up cycle 1875 + ( 880 - 375 =505 ) = 2380 start up watts . Most HF inverters won't handle that being 1000w rated capacity .

The voltage regulator on the outboard has a chance of malfunctioning but you can use a 9a DC to DC to charge the LTO's also. Once the LTO is charge up from the alternator it should be 14.4v and no more will flow or voltage rise if the regulator is working properly.

The acid based silicon sealer works for 40 years+ , how ever do not use on live circuits until it has cured for 24hrs. Acid conducts electricity until has cured . The only thing that it cannot handle is gasoline . It eats the bond to what ever you stuck it to.

How about cement board

Aluminum melts at @ 1100 to1200 F , steel a lot hotter . Both will conduct heat very well to burn anything burnable around them. use 1" of drywall for 1 hr fire rating (350F) Jim Jr

(not to be argumentative ) You provided a more technical answer than me , but the old farts before us got the job done with a limited amount of power also, whether it comes from grid tie or inverter , 1.5hp pump is still @ 1140 running watts , well within the 4kw inverter . Its just a matter...

Starting AC motors is the same as starting DC motors, they need the power now. A 3000F capacitor has @ 3watts capacity , a ac capacitor 45uf to 100uf less that. But on line voltage it has a lot of punch to melt a 16 penny nail . Back before most of you were a twinkle in your fathers eye ...

Check also before discharging , the volts between cells. Did you have the equalizer installed or not. You can use 12 other for extra capacity for the lights since at 6s1p at 40ah there is only @ 500 usable watts Also nice looking van. :)

Add a clock :) ?

They like the lto's for the high response time and quicker charge time , the Lifepo4s can't match the performance . A capacitor bank has great input and output , unless you spend 10k plus, they don't store many watts. 3000F = @ 3 watts . Pushing the watts they do , caps fade quickly. Nothing...

Just watch out for the charge curve goes up quick after 2.5v , measure each cell . Good luck

Sounds like most of the kw is needed for air conditioning . Check out insulating more and heat reflective roof coatings and if you have a enough water source to use water cooled heat exchangers . Also more trees to shade the house from the sun.

Hold off on using the loctite until after testing , and polish the aluminum with scotchbrite to take off the thin film of al oxide between the connections and use your mg compound to prevent oxidation . High amperage charging and high discharge are real picky on the resistance of the...

Here's the 18ah Lishen 1C discharge curve JimJr

Yes I have, I use the one's with the higher resistor count for the 2k to 3k farads at 2.5v. I mainly use the for a motor stator setup, without a voltage regulator . I also use a BMS with a start function on the smaller 3-10ah batteries . The larger ones 20 to 45ah+ , I use a equalizer only...

6S2p using 40ah (80ah battery) yinlongs with 1/8 copper bar connectors should give you @3200 CCA . Since you are probably using 2 or more group 31's. You need a proper connection with the starter , My son was working on a 7.3L with fuel issue , cranked it for about 10 min until the lead...

Is it 12 or 24v starter ?

Not disagreeing with your numbers . But at max load on the rest of the assembly will have problems long before that 2/0 cable will . The 2awg battery wire should be connected to the buss directly for each battery . #2 is only rated for @200a . With 3 batteries set paralleled together ( not...

In my opinion I agree the bus bars need to be replaced , but the 2/0 wire should be ok . the lugs appear to be the thinner wall ones , they are ok for momentary high loads only. Also use washers to to spread out the clamping force more evenly . ( copper sticks to the bolt) The fuse is assemble...

6S2P should be fine @ 500 watts at 36ah , I had a set of 6S1P 30ah grade B-C Yinlongs get @1100 CCA and they started a 8L tractor at -15F Jimjr

What are you trying to start ?

I have had the 30-40ah batteries on anywhere from a 35a to 150a alternators and 5 to 24 year old ones . Haven't burned one out yet . They had enough ventilation . ex cars , trucks , tractors

Most of the people out there do not have a Bridgeport mill to use a 1/4 end mill to drill holes . Drill presses wobble a lot and need a vise. And apparently you haven't used a split point drill bit. I can drill 1/4 holes, 1.5" deep in aluminum at 4000rpm at 100." per min an be within .0005"...

Use split point drill bits , they don't walk around and drill easier and less heat . Heat will cause a lot of burrs . https://www.mcmaster.com/screw-machine-drill-bits/short-length-drill-bits/ I have used these for years and they are cheaper than the rest , and drill faster. When Burton Snow...