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[EnergyPlus_Support] Re: solar collector to sky radiator
Jeff,
I try to search it in sciencedirect but no result was found.
Ian
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Danny Bishop"
<bish.dj@...> wrote:
>
> Jeff, how can we access this paper?
> thanks
> Danny
>
> On Mon, Dec 1, 2008 at 10:28 AM, Jeff Haberl <jeffhaberl@...>wrote:
>
> > FYI:
> >
> > You might also find the following PhD Dissertation useful "An
Investigation
> > of Methods for Reducing
> > the Use of Non-Renewable Energy Resources for Housing in
Thailand",
> > Sakkara, Rasisuttha, Energy
> > Systems Lab Report No. ESL-TH-05-05-01, (May).
> >
> > In it are measurements made in College Station of a triple-effect
solar
> > collector used to collect electricity,
> > solar thermal heating and for rejecting heat a night. The
conclusions are
> > that it would be better to use
> > special-purpose collectors for each, as the glass in the PV panel
is a poor
> > conductor, and acts like an unglazed collector.
> >
> > Jeff
> >
> > 8=! 8=) :=) 8=) ;=) 8=) 8=( 8=) :=') 8=) 8=) 8=?
> > Jeff S. Haberl, Ph.D.,
> >
P.E.............................jhaberl@...<P.E.......................
......jhaberl%40esl.tamu.edu>
> >
Professor......................................................Office
Ph:
> > 979-845-6507
> > Department of Architecture.......................Lab Ph: 979-845-
6065
> > Energy Systems Laboratory.......................FAX: 979-862-2457
> > Texas A&M University..............................77843-3581
> > College Station, Texas, USA.......................URL: www-
esl.tamu.edu
> > 8=/ 8=) :=) 8=) ;=) 8=) 8=() 8=) 8=? 8=) 8=) 8=)
> >
> > ________________________________
> >
> > From: EnergyPlus_Support@xxxxxxxxxxxxxxx<EnergyPlus_Support%
40yahoogroups.com>on behalf of ian8512
> > Sent: Sun 11/30/2008 5:56 AM
> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx<EnergyPlus_Support%
40yahoogroups.com>
> > Subject: [EnergyPlus_Support] Re: solar collector to sky radiator
> >
> > Dr Li,
> > Cause I am handling with another project right now. I may upload
the
> > error file a few days later. Cos I will stuggle with it afterward.
> >
> > Ian
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx<EnergyPlus_Support%
40yahoogroups.com><mailto:
> > EnergyPlus_Support%40yahoogroups.com<EnergyPlus_Support%
2540yahoogroups.com>>
> > , Yuen Liu <yli006@>
> > wrote:
> > >
> > >
> > > Hi, Ian
> > >
> > > If you have already run the simulatin as is, you may have
noticed
> > that the capacity of the panels is about 6 kW for heating. The
night
> > time heat loss was a small fraction of this number. I may be wrong
> > in reading the result. as I have just installed the Version 3.0,
> > and some of the variables have different names.
> > >
> > > If you are still interested in knowing what is wrong with your
IDF
> > file, I suggest that you up-load the IDF file to this group. Some
> > one may have a look at it.
> > >
> > > I have students working on solar panels at the University of
> > Malaya, Kuala Lumpur, years ago (1960's). The panel temperature
was
> > not very low at night. The panel temperature follows the outdoor
> > temperature and lower by about 3 to 5 °C. The day time panel
> > temperature can reach about 80°C.
> > >
> > > Regards,
> > > Dr. Li.
> > >
> > >
> > > To: EnergyPlus_Support@: ian8512@: Fri, 28 Nov 2008 19:39:57
> > +0000Subject: [EnergyPlus_Support] Re: solar collector to sky
radiator
> > >
> > >
> > >
> > > Dr. Li, Thanks you for helpful advice on the simulation of sky
> > radiator!As i am trying to investigate the feasibilty of using sky
> > radiator, therefore, the idea of flat plated being buried
underground
> > doesn't work for me. But anyway, thanks for your reply, it has
> > inspriated me.Best RegardsIan--- In
> > EnergyPlus_Support@xxxxxxxxxxxxxxx <EnergyPlus_Support%
40yahoogroups.com><mailto:
> > EnergyPlus_Support%40yahoogroups.com<EnergyPlus_Support%
2540yahoogroups.com>>
> > , Yuen Liu <yli006@> wrote:>> > In
> > a situalation you described, I usually change the equipment
> > availability schedule and leave all the equipment as is.> > For
> > example, if you set the 'heater on' temperature below the night
> > temperature, it will not come on. I assume that the water usage
can
> > also be shut off during the day.> Do the changes one at a time and
> > study the result.> > You also need to make sure that the DesignDay
> > temperature will give you the cold period between 9 am and 6 am.>
> I
> > have not looked at the actual example file, you may have problem
> > turning off the circulation between the plate and the tank during
the
> > day. However, this problem will still be there, even if you remove
> > the heater completely.> > Your condition seems to be that when the
> > outdoor temperature is higher then the 16°C the circulation is cut
> > off. The original condition is for the sun to heat the panel to
above
> > a certian temperature and then circulate. This is the part I
think is
> > causing the problem.> > If you are thinking of using this system
to
> > collect free cold water, it may work using the ground temperature
> > which does not change very much, and can be left connected the
whole
> > day, with the flat panel buried below ground.> > Regards,> Dr.
Li> >
> > > > To: EnergyPlus_Support@: ian8512@: Fri, 28 Nov 2008 10:55:34
> > +0000Subject: [EnergyPlus_Support] solar collector to sky
radiator> >
> > > > I am going to stimulate a sky radiator using an existing
example
> > in energy plus - solar collector.In the solar collector, there
are 4
> > components, they are the flat plate, storage tank, heater and
water
> > use connections objects.I am trying to change it to 2 components,
> > falte plate and a storage tank. And the operation time will be at
> > night(21:00 to 6:00)and the set point temperature of the storage
tank
> > will be around 20 deg. celeus to 16 deg. celeus.However,
everytime,
> > there are so many errors after I attempted to change those
parameter
> > and setting.Could somebody lend a helping hand?? > > > > > >
> > __________________________________________________________>
> > >
> > >
> > >
> > >
> > >
> > > __________________________________________________________
> > >
> >
> >
> >
>
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