Posted by Paul on September 28, 2005, 2:15 am
>> You ask "Where is the commercial activity ? "
>>
>> I am looking into converting some of my hot water heating needs for a
>> laundromat to solar. I have received information on a system
>> manufactored by Sunda Technologies. Anyone have any information on the
>> company? Also, this would be the first of our mats that we are looking
>> to convert (natural gas prices are not getting cheaper if you have
>> noticed)...Any helpful guidelines would be appreciated.
>>
>> Thanks,
>> aust1648@gmail.com
>>
> A laundromat.. That is a GREAT application for solar water heating !
> Where are you located physically ?
> I do not know Sunda. But found that they sell evacuated tube collectors
> from China. They sell in the US via Sun Spot Solar
> (http://www.sssolar.com/ )
> Now, evacuated tube should be more efficient than plat-panel collectors,
> but they are also a lot more expensive (per sq ft of collector area).
> Evacuated tube collectors make sense if you need really hot water (for
> example, to minimize the hot-water-storage tank size),
> and/or install the system in a relatively cold climate. You might want to
> get a qoute from some other vendor
> with a flat-panel system and see which one best meets your requirements.
> Rob
As a personal rule of thumb, on prices I looked for in the past,
flat plates were going for $00-$000 for a 4' x 8' (29 sq. ft. active)
and evacuated tubes were running over $000 for under 20 square feet of
active area.
Flat plates can be under 15% efficient with very hot water in very cold
climates.
Evacuated tube collectors can be over 30% efficient under the same
conditions.
These are just rough estimates, but you may be able to tell from this if
these are
cost effective for your application. Just preheating the water with flat
plates
before you heat it with natural gas can still save lots of money in the long
run.
http://www.sunearthinc.com/
http://www.thermomax.com/tec_index.htm
Posted by Rob Dekker on September 28, 2005, 8:40 pm
[....]
> As a personal rule of thumb, on prices I looked for in the past,
> flat plates were going for $00-$000 for a 4' x 8' (29 sq. ft. active)
> and evacuated tubes were running over $000 for under 20 square feet of active
area.
Elsewhere in this thread, we found a couple of manufacturers of water-heating
flat-panels
that sell in the range of $50 - $00 /m^2 for the larger panels.
European manufacturers are also in that range.
This US producer here has decent 4'x8' panels for about $00.
Larger panets are cheaper (per sqft).
http://www.sunraysolar.com/pricelist.html
Of course, you would need to include installation, and water-storage-tank(s),
and a bit for a pump and stuff.
[....]
Posted by Paul on September 29, 2005, 3:26 am
>>
> [....]
>> As a personal rule of thumb, on prices I looked for in the past,
>> flat plates were going for $00-$000 for a 4' x 8' (29 sq. ft. active)
>> and evacuated tubes were running over $000 for under 20 square feet of
>> active area.
> Elsewhere in this thread, we found a couple of manufacturers of
> water-heating flat-panels
> that sell in the range of $50 - $00 /m^2 for the larger panels.
> European manufacturers are also in that range.
> This US producer here has decent 4'x8' panels for about $00.
> Larger panets are cheaper (per sqft).
> http://www.sunraysolar.com/pricelist.html
> Of course, you would need to include installation, and
> water-storage-tank(s),
> and a bit for a pump and stuff.
> [....]
Sunray has some nice looking stuff. I was going from the SunEarth pricing.
They start at about $95 and go up beyond $95 I believe. Depends on
double pane, selective coating and such. If he elected to go flat plate for
preheating and was in a cold climate, the double pane might be called for.
Posted by Q on October 31, 2005, 1:33 am
>
>>
>>>
>> [....]
>>> As a personal rule of thumb, on prices I looked for in the past,
>>> flat plates were going for $00-$000 for a 4' x 8' (29 sq. ft.
>>> active) and evacuated tubes were running over $000 for under 20
>>> square feet of active area.
>>
>> Elsewhere in this thread, we found a couple of manufacturers of
>> water-heating flat-panels
>> that sell in the range of $50 - $00 /m^2 for the larger panels.
>> European manufacturers are also in that range.
>>
>> This US producer here has decent 4'x8' panels for about $00.
>> Larger panets are cheaper (per sqft).
>> http://www.sunraysolar.com/pricelist.html
>>
>> Of course, you would need to include installation, and
>> water-storage-tank(s),
>> and a bit for a pump and stuff.
>>
>>
>> [....]
>>
> Sunray has some nice looking stuff. I was going from the SunEarth
> pricing.
> They start at about $95 and go up beyond $95 I believe. Depends on
> double pane, selective coating and such. If he elected to go flat
> plate for preheating and was in a cold climate, the double pane might
> be called for.
>
>
AET in Jacksonville, Florida, has well-designed and built 4'x8' flat-
plate panels for under $US 500. These will work well for just about
anywhere in the continental US. No need to get fancy with vacuum tubes
in most cases.
We are selling and installing commercial systems to hotel laundries that
produce 100 GPD of 140 deg F HW for under $US 25,000. The recently
signed Energy Policy Act of 2005 provides for $US 0.60/sq ft of
additional depreciation for commercial buildings that use solar hot
water. That is a pretty good incentive!
Mark
Gulf Coast Solar
www.gulfcoastsolarinc.com
Posted by Q on October 31, 2005, 1:46 am
216.77.188.18:
>
>>
>>>
>>>>
>>> [....]
>>>> As a personal rule of thumb, on prices I looked for in the past,
>>>> flat plates were going for $00-$000 for a 4' x 8' (29 sq. ft.
>>>> active) and evacuated tubes were running over $000 for under 20
>>>> square feet of active area.
>>>
>>> Elsewhere in this thread, we found a couple of manufacturers of
>>> water-heating flat-panels
>>> that sell in the range of $50 - $00 /m^2 for the larger panels.
>>> European manufacturers are also in that range.
>>>
>>> This US producer here has decent 4'x8' panels for about $00.
>>> Larger panets are cheaper (per sqft).
>>> http://www.sunraysolar.com/pricelist.html
>>>
>>> Of course, you would need to include installation, and
>>> water-storage-tank(s),
>>> and a bit for a pump and stuff.
>>>
>>>
>>> [....]
>>>
>> Sunray has some nice looking stuff. I was going from the SunEarth
>> pricing.
>> They start at about $95 and go up beyond $95 I believe. Depends on
>> double pane, selective coating and such. If he elected to go flat
>> plate for preheating and was in a cold climate, the double pane might
>> be called for.
>>
>>
>
> AET in Jacksonville, Florida, has well-designed and built 4'x8' flat-
> plate panels for under $US 500. These will work well for just about
> anywhere in the continental US. No need to get fancy with vacuum tubes
> in most cases.
>
> We are selling and installing commercial systems to hotel laundries
that
> produce 100 GPD
Correction: 1000 GPD
X of 140 deg F HW for under $US 25,000. The recently
> signed Energy Policy Act of 2005 provides for $US 0.60/sq ft of
> additional depreciation for commercial buildings that use solar hot
> water. That is a pretty good incentive!
>
> Mark
> Gulf Coast Solar
> www.gulfcoastsolarinc.com
>
XML site map
>>
>> I am looking into converting some of my hot water heating needs for a
>> laundromat to solar. I have received information on a system
>> manufactored by Sunda Technologies. Anyone have any information on the
>> company? Also, this would be the first of our mats that we are looking
>> to convert (natural gas prices are not getting cheaper if you have
>> noticed)...Any helpful guidelines would be appreciated.
>>
>> Thanks,
>> aust1648@gmail.com
>>
> A laundromat.. That is a GREAT application for solar water heating !
> Where are you located physically ?
> I do not know Sunda. But found that they sell evacuated tube collectors
> from China. They sell in the US via Sun Spot Solar
> (http://www.sssolar.com/ )
> Now, evacuated tube should be more efficient than plat-panel collectors,
> but they are also a lot more expensive (per sq ft of collector area).
> Evacuated tube collectors make sense if you need really hot water (for
> example, to minimize the hot-water-storage tank size),
> and/or install the system in a relatively cold climate. You might want to
> get a qoute from some other vendor
> with a flat-panel system and see which one best meets your requirements.
> Rob