Posted by RamRod Sword of Baal on February 25, 2007, 3:18 am
> Hi RamRodl;
> > For instance a 2 Hp motor uses around 1500 watts of power,
> Ok, A unit of power.
> > that is over 4500 BTUs
> But of course, this is not a unit of power.
> Please be more careful.
> Duane
If you wish to be pedantic, then a horsepower is 746 watts, and a watt is
equal to 3.142 BTUs
The power (watts) are used in the electric motor inside the sealed unit
compressor, and heat (BTUs) are given off in the process, which in turn is
picked up by the refrigerant and has to be eliminated.
The numbers are theoretical, and I have not included any losses, so shoot
me..............
Posted by Joe Fischer on February 25, 2007, 5:25 am
On Sun, 25 Feb 2007 03:18:03 GMT, "RamRod Sword of Baal"
>If you wish to be pedantic, then a horsepower is 746 watts, and a watt is
>equal to 3.142 BTUs
He meant that it should be BTUs / hour to equal watts,
but then watt hours can also equal BTUs.
The hours just need to be in the right place.
Joe Fischer
Posted by Mauried on February 25, 2007, 2:27 am
On 24 Feb 2007 12:15:16 -0800, markzoom@digiverse.net wrote:
>> On 23 Feb 2007 16:34:24 -0800, markz...@digiverse.net wrote:
>>
>> >BTW.: I also suspect any standard heatpump compressor can be used at
>> >variable speeds if the restrictor orifice is pressure regulated. A
>> >sprung needle valve might do that job.
>>
>> This is really kinda funny.
>Glad you're having fun.
>> You lack the refrigeration knowledge to
>> realize that the device you describe is the common thermostatic
>> expansion valve (TXV)
>That's why I asked for "experts" to comment.
>> and yet you argue against the sound advice given
>> by many of us who DO know HVAC.
>I weigh up the comments made.
>The bottom line is that a wind generator driven heat pump WILL give
>more heat output than an electrically driven one, with the added bonus
>of providing refrigeration and needing FAR FEWER COMPONENTS than an
>expensive electricity generating turbine driving an expensive electric
>air conditioning unit.
It may do, but at what cost.
I just recently bought a 1HP reverse cycle AC to heat and cool my
study.
It cost me $50.
Will your wind driven system with its turbine , mast to hold the
turbine , installation costs of the tower and foundations plus all the
pipes and air exchangers cost $50 or less.
Somehow I dont think so.
People get far to obsessed with efficiency and lose sight of reality.
Posted by markzoom on February 25, 2007, 7:32 pm
On 25 Feb, 04:27, maur...@tpg.com.au (Mauried) wrote:
> On 24 Feb 2007 12:15:16 -0800, markz...@digiverse.net wrote:
> >> On 23 Feb 2007 16:34:24 -0800, markz...@digiverse.net wrote:
> >> >BTW.: I also suspect any standard heatpump compressor can be used at
> >> >variable speeds if the restrictor orifice is pressure regulated. A
> >> >sprung needle valve might do that job.
> >> This is really kinda funny.
> >Glad you're having fun.
> >> You lack the refrigeration knowledge to
> >> realize that the device you describe is the common thermostatic
> >> expansion valve (TXV)
> >That's why I asked for "experts" to comment.
> >> and yet you argue against the sound advice given
> >> by many of us who DO know HVAC.
> >I weigh up the comments made.
> >The bottom line is that a wind generator driven heat pump WILL give
> >more heat output than an electrically driven one, with the added bonus
> >of providing refrigeration and needing FAR FEWER COMPONENTS than an
> >expensive electricity generating turbine driving an expensive electric
> >air conditioning unit.
> It may do, but at what cost.
> I just recently bought a 1HP reverse cycle AC to heat and cool my
> study.
> It cost me $50.
You forgot to add the electricity bills for the life of your unit.
> Will your wind driven system with its turbine , mast to hold the
> turbine , installation costs of the tower and foundations plus all the
> pipes and air exchangers cost $50 or less.
> Somehow I dont think so.
> People get far to obsessed with efficiency and lose sight of reality.
You lost sight of your electricity bill.
Posted by gfretwell on February 26, 2007, 12:04 am
On 25 Feb 2007 11:32:13 -0800, markzoom@digiverse.net wrote:
>On 25 Feb, 04:27, maur...@tpg.com.au (Mauried) wrote:
>> On 24 Feb 2007 12:15:16 -0800, markz...@digiverse.net wrote:
>>
>>
>>
>> >> On 23 Feb 2007 16:34:24 -0800, markz...@digiverse.net wrote:
>>
>> >> >BTW.: I also suspect any standard heatpump compressor can be used at
>> >> >variable speeds if the restrictor orifice is pressure regulated. A
>> >> >sprung needle valve might do that job.
>>
>> >> This is really kinda funny.
>>
>> >Glad you're having fun.
>>
>> >> You lack the refrigeration knowledge to
>> >> realize that the device you describe is the common thermostatic
>> >> expansion valve (TXV)
>>
>> >That's why I asked for "experts" to comment.
>>
>> >> and yet you argue against the sound advice given
>> >> by many of us who DO know HVAC.
>>
>> >I weigh up the comments made.
>> >The bottom line is that a wind generator driven heat pump WILL give
>> >more heat output than an electrically driven one, with the added bonus
>> >of providing refrigeration and needing FAR FEWER COMPONENTS than an
>> >expensive electricity generating turbine driving an expensive electric
>> >air conditioning unit.
>>
>> It may do, but at what cost.
>> I just recently bought a 1HP reverse cycle AC to heat and cool my
>> study.
>> It cost me $50.
>You forgot to add the electricity bills for the life of your unit.
>> Will your wind driven system with its turbine , mast to hold the
>> turbine , installation costs of the tower and foundations plus all the
>> pipes and air exchangers cost $50 or less.
>> Somehow I dont think so.
>> People get far to obsessed with efficiency and lose sight of reality.
>You lost sight of your electricity bill.
I think his point is you can get "free" energy from the environmernt
but, by the time you amortize your capital expense and maintain the
system it will be the most expensive way to heat/cool your home. That
is why I suggested using junk car parts or other "damn near free"
stuff for your expiriments, to prove the concept and have some fun
without breaking the bank.
It will never be cost effective, the only question is how much do you
want to spend to prove that. Actually if you can make a somewhat
effective system for a few hundred bucks you might actually cool/heat
a small space for (almost) free.
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> > For instance a 2 Hp motor uses around 1500 watts of power,
> Ok, A unit of power.
> > that is over 4500 BTUs
> But of course, this is not a unit of power.
> Please be more careful.
> Duane