4.40 DHWLOOPSEG

DHWLOOPSEG constructs one or more objects representing a segment of the preceeding DHWLOOP. A DHWLOOP can have any number of DHWLOOPSEGs to represent the segments of the loop with possibly differing sizes, insulation, or surrounding conditions.

wgName

Optional name of segment; give after the word “DHWLOOPSEG” if desired.

Units	Legal Range	Default	Required	Variability
	63 characters	none	No	constant

wgTy=choice

Specifies the type of segment. RETURN segments, if any, must follow SUPPLY segments.

SUPPLY	Indicates a supply segment (flow is sum of circulation and draw flow, child DHWLOOPBRANCHs permitted).
RETURN	Indicates a return segment (flow is only due to circulation, child DHWLOOPBRANCHs not allowed)

Units	Legal Range	Default	Required	Variability
		none	Yes	constant

wgLength=float

Length of segment.

Units	Legal Range	Default	Required	Variability
ft	x \(\ge\) 0	0	No	constant

wgSize=float

Nominal size of pipe. CSE assumes the pipe outside diameter = size + 0.125 in.

Units	Legal Range	Default	Required	Variability
in	x \(>\) 0	1	Yes	constant

wgInsulK=float

Pipe insulation conductivity

Units	Legal Range	Default	Required	**Variability
Btuh-ft/ft2-oF	x \(>\) 0	0.02167	No	constant

wgInsulThk=float

Pipe insulation thickness

Units	Legal Range	Default	Required	Variability
in	x \(\ge\) 0	1	No	constant

wgExH=float

Combined radiant/convective exterior surface conductance between insulation (or pipe if no insulation) and surround.

Units	Legal Range	Default	Required	Variability
Btuh/ft2-oF	x \(>\) 0	1.5	No	hourly

wgExT=float

Surrounding equivalent temperature.

Units	Legal Range	Default	Required	Variability
oF	x \(>\) 0	70	No	hourly

wgFNoDraw=float

Fraction of hour when no draw occurs.

Units	Legal Range	Default	Required	Variability
oF	x \(>\) 0	70	No	hourly

endDHWLoopSeg

Optionally indicates the end of the DHWLOOPSEG definition.

Units	Legal Range	Default	Required	Variability
		none	No

Related Probes:

• @DHWLoopSeg