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<div class=Section1>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I will be very gratefully for any help.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I´m a researcher in the University of Cadiz
(Spain). We´re studying how DOE-2 carry out the simulation for Fancoils and
Chillers systems. We need to know the relation between the capacities and the
air entering temperatures (wet bulb and dry bulb), and water entering
temperatures. The simulations proceed of cases that have a Chiller enough powerful
to attend the fancoils demand has been concluded. The conclusions have been
reached with different simulations and tests. All these cases, show that,
curiosity, fancoils´ total and sensible capacities are not depended of water entering
temperatures. In all these cases is easy to calculate the capacities (they are
the product between nominal capacities and air entering temperatures
functions). The fancoil power, logically, is the same that the product of the capacity
and the PLR. The outside temperatures of air and water, are calculated with
this power, and the power that the chiller gives is a bit bigger that the fancoil
power needed, and is the same that the Net hourly loop load (including thermal
losses). Every equation looks closed and logical (except the fact that the
capacity calculation, in those cases, is not function of water entering
temperatures, but the calculations and tests confirm that).<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Our problems merge when chiller is not enough
big to attend the fancoils demand, then some calculation relations change. Now
the fancoil power is not the logical product between the capacity and the PLR,
and the capacity is not the product of the nominal value and the air entering
temperatures function. Maybe now, in this cases, the water entering temperatures
will be considered in the fancoil capacities calculation in some way, but we
haven´t found any logical relation to explain how it´s working. DOE-2 have a
function that modifies the capacities in function of water entering temperature
and air wet bulb temperatures. We are trying to find a relation between this
function and the capacities calculation in this cases, but we haven´t found
anything at the moment. In addition, for Fancoil PLR minor that 1 the fancoil
power continues coinciding with the load on loop, and the chiller power is a
bit bigger that this, being the same that the Net Hourly loop load. However,
for fancoil PLR equals to 1, not even these relations are correct.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Someone could give some information about
the way in that eQuest works when the chiller is not enough big to attend the
fancoils demand?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Any help will be very useful.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Thank you very much in advance to
everybody.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>----------------------------------------------------------------------<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Paloma
Rocío Cubillas Fernández<o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Personal
Docente e Investigador</span><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Universidad
de Cádiz<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Dpto.
Máquinas y Motores Térmicos<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Escuela
Politécnica Superior de Algeciras<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Avda/Ramón
Puyol, s/n. CP. 11202. Algeciras.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Teléfono:
956-028030<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Fax:
956-028001<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>-----------------------------------------------------------------------------------------<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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