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Fred,<br>
Type557 has a built-in assumption of a cylindrical bore-field
configuration. It might be possible to fake the thermal properties in
order to model a single line of bores but I am not sure I'd know how to
suggest that you accomplish that. There are a few models out there for
borefields that allow you to place the bores wherever you want but I've
not used any of them. <br>
<br>
As for the run-outs (between the bore field and the heat exchanger),
I'd use the simplified buried pipe that is in the TESS Library
(basically Type31 but with an embedded ground temperature model)
because its quick. Type556, while a more detailed model of the run-out
is slower. Both models account for the thermal capacitance of the fluid
in the pipe.<br>
Kind Regards,<br>
David<br>
<br>
<br>
Fred Betz wrote:
<blockquote cite="mid:4A893413.D36D.0005.0@aeieng.com" type="cite">
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<div>Is there a way of deciding a specific layout of the bore field
using type 557a?</div>
<div> </div>
<div>I have one vertical u-tube field type that is around the
perimeter of a building, essentially all the pipes in a single row. </div>
<div> </div>
<div>The second is a typical vertical u-tube with the bore holes
evenly spaced in an array. However that array is not symmetrical. </div>
<div> </div>
<div>Also, should I use a type 556 buried horizontal pipe between the
bore field and the heat exchanger or a normal type 31 pipe? Is type556
meant to be used as a pipe or as another heat exchange method like
type557a? Will the model take into account the volume of the pipe in
the calculations so the simulation converges?</div>
<div> </div>
<div>Thanks,</div>
<div> </div>
<div>Fred</div>
<div> </div>
<div> </div>
<div> </div>
<div>Fred Betz, PhD., LEED AP</div>
<div>Senior Sustainable Design Consultant</div>
<div>Affiliated Engineers, Inc.</div>
<div>608-236-1175</div>
<div>608-444-4857 (c)</div>
<div><a moz-do-not-send="true" href="mailto:fbetz@aeieng.com">fbetz@aeieng.com</a></div>
<div><a moz-do-not-send="true" href="http://www.aeieng.com/">www.aeieng.com</a></div>
<div> </div>
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