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Search: Posts Made By: DEnd
Forum: Geothermal & Heat Pumps 10-30-17, 05:29 AM
Replies: 96
Views: 9,308
Posted By DEnd
It'll pull heat out of the air as long as there...

It'll pull heat out of the air as long as there is heat in the house. The question is will it cause you to run your furnace more or not. Where that point is, is entirely dependent on how much stack...
Forum: Geothermal & Heat Pumps 10-29-17, 03:57 AM
Replies: 96
Views: 9,308
Posted By DEnd
You're gonna have to give somewhere to hit that. ...

You're gonna have to give somewhere to hit that. You've got days coming up where you are going to more than double the temperature difference between indoor and outdoor air temperatures. Or are you...
Forum: Renovations & New Construction 10-29-17, 03:43 AM
Replies: 13
Views: 2,291
Posted By DEnd
Using the existing ducts is the cheap way to go...

Using the existing ducts is the cheap way to go about it. but he won't be gaining any sort of performance improvement. He'll still be negatively pressurizing the house (drawing in a trapping soil...
Forum: Renovations & New Construction 10-09-17, 10:11 AM
Replies: 13
Views: 2,291
Posted By DEnd
If you can swing it financially I would not...

If you can swing it financially I would not hesitate to switch to dustless minisplits for your heat and cooling. No duct losses, energy use that matches or beats most ground source heat-pumps except...
Forum: Geothermal & Heat Pumps 09-27-17, 11:40 PM
Replies: 96
Views: 9,308
Posted By DEnd
You're missing energy flows. The unit will...

You're missing energy flows. The unit will operate at its COP regardless of outdoor temp. however in reality the added BTUs are only there if the temperature difference of outdoor air and the...
Forum: Geothermal & Heat Pumps 09-27-17, 11:13 PM
Replies: 96
Views: 9,308
Posted By DEnd
The Net gain comes from the infiltrated air temps...

The Net gain comes from the infiltrated air temps vs. The discharge air temps.

Basically the Unit brings in outdoor air at say 72F and discharges it at 32F, so basically there are 40F worth of...
Forum: Renovations & New Construction 09-25-17, 03:33 AM
Replies: 5
Views: 1,231
Posted By DEnd
Is it surface water or ground water? If it's...

Is it surface water or ground water? If it's surface water then the berms will be the cheapest alternative. If the water is enough to cause foundation damage then some metal and clay won't stop it,...
Forum: Geothermal & Heat Pumps 09-25-17, 02:58 AM
Replies: 96
Views: 9,308
Posted By DEnd
Not quite in this instance. Since the unit is...

Not quite in this instance. Since the unit is working solely indoors, it is also using heat from other sources. That outside air is first warmed before it hits the unit. It's measured COP should...
Forum: Geothermal & Heat Pumps 09-25-17, 02:49 AM
Replies: 96
Views: 9,308
Posted By DEnd
The issue is the heat doesn't stay in the house. ...

The issue is the heat doesn't stay in the house. You are basically adding energy to the air and it will move as fast as it can outside the house. A major path of this energy escape is the stack...
Forum: Geothermal & Heat Pumps 09-02-17, 08:09 AM
Replies: 30
Views: 5,050
Posted By DEnd
You still have to add heat to regenerate the...

You still have to add heat to regenerate the desiccant, and that amount of heat is equal to the amount of energy needed to drive the desired amount of phase change. With that you likely then have...
Forum: Geothermal & Heat Pumps 08-25-17, 07:09 AM
Replies: 30
Views: 5,050
Posted By DEnd
You don't even need salt for this type of system....

You don't even need salt for this type of system. Water itself will act as a desiccant as long as its temperature is below the dew point. With this type of system when you do the heat removal...
Forum: Renovations & New Construction 07-13-17, 02:12 PM
Replies: 1
Views: 1,083
Posted By DEnd
First you need to check with you county/city and...

First you need to check with you county/city and see if you need a building permit for your renovations. This protects you if you ever need to file an insurance claim, and also when the time comes...
Forum: Solar Power 06-04-17, 01:03 PM
Replies: 728
Views: 125,761
Posted By DEnd
Mega is upper case to differentiate it from milli...

Mega is upper case to differentiate it from milli (thousandth or .001). Anything Mega and up is capitalized as Peta (P), Zetta (Z), and Yotta (Y), also share lower case abbreviations with Pico (p),...
Forum: Conservation 05-24-17, 01:54 AM
Replies: 252
Views: 35,708
Posted By DEnd
While I mostly agree with you on the diesel point...

While I mostly agree with you on the diesel point (though diesel cars pay more tax to begin with, but that's federal), I completely agree with the tax on EVs. As the plan sits the EVs will only pay...
Forum: Conservation 05-22-17, 05:15 AM
Replies: 252
Views: 35,708
Posted By DEnd
pinball what's your tax going to be now? SC's EV...

pinball what's your tax going to be now? SC's EV road use tax is lower than NC's (at least I'm assuming they passed the gas tax overhaul/increase in SC, because it was sorely needed) and the last I...
Forum: Geothermal & Heat Pumps 05-22-17, 05:05 AM
Replies: 42
Views: 5,007
Posted By DEnd
You'll run out of heat storage fairly quickly. ...

You'll run out of heat storage fairly quickly. At 14k gallons you have 116,836 btu's per degree of water temp. We should assume the starting water temp will be around the average ground temp, so...
Forum: Renovations & New Construction 05-20-17, 10:19 AM
Replies: 28
Views: 3,711
Posted By DEnd
Go to a library, and look it up. O.K. you might...

Go to a library, and look it up. O.K. you might need to go to a library at a school with an architectural or structural engineering program. Failing that Google Scholar list over 3,000,000 articles...
Forum: The Billiards Room 05-20-17, 08:05 AM
Replies: 7
Views: 907
Posted By DEnd
Subsoil wood contact with concrete matters (sort...

Subsoil wood contact with concrete matters (sort of). Wood will only rot in the presence of oxygen, and the further you are in the soil the lower the oxygen content, especially when you have an...
Forum: Renovations & New Construction 05-20-17, 07:13 AM
Replies: 8
Views: 1,666
Posted By DEnd
There is no ideal room temperature. The reason...

There is no ideal room temperature. The reason is there is a huge variation on how people dress and what amount of sheets/blankets they sleep under, as well as body size and metabolism. The 65F...
Forum: Renovations & New Construction 05-20-17, 05:22 AM
Replies: 28
Views: 3,711
Posted By DEnd
Not to be a Debbie Downer but I'm confused by...

Not to be a Debbie Downer but I'm confused by what you are trying to do.

The impact resistance of concrete is well understood, and cost effective measures are already available. The issue is cost...
Forum: Conservation 05-16-17, 10:22 PM
Replies: 25
Views: 5,576
Posted By DEnd
Dang it now I'm almost jealous. I want an...

Dang it now I'm almost jealous. I want an electric truck with about a 150 mile range. Yours is so close...
Forum: Renovations & New Construction 05-16-17, 09:59 PM
Replies: 1
Views: 725
Posted By DEnd
First of all I would advise you not to build on...

First of all I would advise you not to build on top of a garage if you can avoid it. This is because attached garages are a major source of pollution in homes. In the winter the stack effect inside...
Forum: Renovations & New Construction 05-02-17, 06:24 AM
Replies: 98
Views: 12,092
Posted By DEnd
Well you can just rip the siding off do some...

Well you can just rip the siding off do some airsealing and put about r-10 exterior insulation on. Then your girlfriend can enjoy the stress of remodeling since she missed out on the stress of home...
Forum: Lawn and Garden 04-26-17, 03:41 PM
Replies: 853
Views: 117,826
Posted By DEnd
Was it really full of water? I bet it wasn't. ...

Was it really full of water? I bet it wasn't.

Do this go fill up your sink and then take a cup and fill it about 3/4 full of water. Gently place it bottom down in the water. Does it still...
Forum: Conservation 04-26-17, 03:00 PM
Replies: 88
Views: 12,173
Posted By DEnd
But that will also limit it's charge rate. The...

But that will also limit it's charge rate. The one thing I am disappointed with the Bolt is that it really can't do a fast charge like the Tesla, and that basically limits it to being a city...
Showing results 1 to 25 of 117

 
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