Quantcast Heating,Ventilation, and Cooling

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OUTSIDE DESIGN TEMPERATURE
Air Condi -
Degree
Winter
Degree
Air Condi -
tioning
Days
Design
Days
tioning
DOD
Design Data
Cooling
Data
Heating
Criteria Data
Design
D. Bulb  W. Bulb  Energy
SITES IN N.C. D. Bulb/MCWB**
D. Bulb
93F 80F  73F 67F Budget
(2 1/2%)
(97 1/2%)
(HOURS) (HOURS) Region
Cape Hatteras
86/77
1550
27
2731
0  832 1521 2771
4
Cherry Point
90/78
1922
24
2832
23 1055 1342 2760
4
Camp Lejeune
90/79
1810
23
2901
30 1020 1481 2870
4
** MCWB - Mean Coincident Wet Bulb Temp @ 2 1/2% DBT
(3) The sequence of operation for the automatic temperature control system
should be shown on the drawings.
b. Heating
(1) Comfort Heating - The heating inside design temperature for personnel
comfort should be 68oF [20oC] for administrative and living areas, 55 oF [12.8oC] for
working areas, and 40 oF [4.4oC] for storage areas for the prevention of freezing.
(2) Describe the source of thermal energy that will be used, such as extens io n of
central high -pressure steam with meter, hot water with meter, or independent heating
facility with the type of fuel to be utilized. Also explain why this source was selected in
lieu of other available sources. Where there is a possibility of more than one type being
economical or where it is large enough to qualify under Energy Conservation, a
computerized analysis shall be included to justify the selection. Resistance electricity is
not allowed for space comfort heating except in unusual situatio ns. Contact Cherry
Point's Mechanical Engineering Branch, telephone 252 -466-4706, for guidance
concerning allowable fuel sources.
(3) Briefly describe and/or show on the drawings the type and routing of the
system proposed to convey the heat source, if applicable; for example, 100 psig low
level, aboveground steam and condensation lines on concrete support, interconnecting to
the existing system at manhole no. 150 and traveling due north into the mechanical
equipment room. State if condensate return sy stem is to be utilized. If condensate is to
be wasted, heat reclaim should be considered. Wasted condensate should go to the
sanitary sewer system. If wasted to sanitary sewer within 100 feet of lift station,
condensate should be cooled to 110oF otherwise use cooling well for one hour of
retention (unless specifically instructed otherwise). Indicate the maximum hourly
production of condensate so Cherry Point may make a study of the storm or sanitary
system adequacy and determine if there are any permit requirements. Include this in the
civil basis of design section.
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