1. HVAC Building & Floor Cooling System
Blanco 4m Telescope
HVAC
Building & Floor Cooling System
E. Figueroa
Oct. 01, 2010

2. Floor Cooling System
2” Dia. Pipe
Building Cooling System
3” Dia. pipe
Chiller 1
Chiller 2

3. 2” Dia. Pipe
3” Dia. Pipe
Chiller 2
10 T. R.
Chiller 1
30 T. R.

4. 4M Blanco Building Cooling Coil Schedule (BCS)
UNIT
CFM
ENT. AIR TEMP. ° F
LVG. AIR TEMP. ° F
SENS. CAP
TOTAL CAP.
CHILLED GLYCOL
GPM
PRESS
N° OF
REMARKS
LOCATION
STATUS N°
D.B.
W.B.
BTU/HR
ENT. TEMP.
LVG.TEMP
DROP H2O
ROWS
ROOM N°
C-1
300
90.0
72.0
56.0
54.5
8,450
16,200
45°F
7.22°C
3.0
12.8 4
TRANE HIGH CAPACITY "C" COIL OR EQUAL
117
Vestibule(visitors access)
WORKING
C-2
180
83.1
66.1 5
6,420
54.4°F
12.44°C
1.5
4.3
109
Elevator N° 1
C-3
160
83.0
3,600
5,540
57.1°F
13.94°C
1.0
3.4
114
Computer room
C-3A
UNKNOWN
Computer room 114
GORUND FLOOR
C-4
350
76.5
61.9
51.0
49.4
7,100
11,400
53.3°F
11.83°C
15.3
Console Room
C-5
600
83.2
66.4
13,500
21,000
56.5°F
4.0
4.9 3
116
Nights lounge Main access
C-6
13.61°C
Visitors Room
C-7
83.3
6,800
10,700
52.8°F
11.55°C
213
Storage Plate
NOT WORKING
C-8
4,050
205
N. Assits Office
C-9
209
Observers Office
C-10
7,850
12,350
58.5°F
2.0
7.9
208
2ND FLOOR
C-11
650
74.8
61.2
12,800
20,000
53.5°F
11.94°C
5.0
6.4
210
Laboratory (Ex Elect Lab.)
C-12
55.4°F
13°C
9.1
211
Laboratory (Ex Elect Lab)
C-13
306
Pump Relay
NOT INSTALLED
C-14
3100
73.4
60.2
57,600
86,000
20.0
10.0 8
TRANE 18"X 25", SERIES 18 IV / TURBULATORS
400.00
Hammerhead
PUMP RELAY
C-15
76.3
62.3
12,600
20,350
56.1°F
13.38°C 2
515
Main Floor
C-16
73.5
5,600
8,300
54.1°F
12.27°C
8.0
506
DARK ROOM 2
MAIN FLOOR
C-17
504
DARK ROOM 1
C-18
605
STAIR
C-19
603
Dark Room 4
REMOVED
C-20
602
Dark Room 3
C-21
450
76.9
62.9
9,650
15,900
53.7°F
12.05°C
MEZZANINE
BTU
339,790
106,630
Ton
28.32
8.89
Kilowatt-hour
99.587
31.251

5. 44M BLANCO TELESCOPE FLOOR COIL SCHEDULE
LOCATION
AREA
GPM
REMARKS N°
SQ.FT 1
MAIN FLR
250
2.2
Between piers 3 & 4 (outside) East Side Stair
Working 2
155
1.4
Between piers 3 & 4 (Inside) East Side Stair 3 50
5.0
Between pier 1 & 3 (inside) East side
Not working or not connected 5 4
100
1.0
Between Pier 1 & 10 (inside) 90
0.9
Between piers 4 & 5 (inside) East Side Stair 6
195
1.7
Between pier 5 & 6 center after hatch 7 45
0.5
Hatch 8 9
140
1.2
Removed from Hatch (out of service)
4.1 10 11 12 13
Between pier 6 & 7(inside) west side 14
Between pier 6 & 7 (inside) 15
215
1.9
Between pier 6 & 7 (center)
working 16
280
2.5
Between pier 6 & 7 (outside) 17 80
0.7
Between piers 5 & 6 (outside near pier 6 18
Between piers 5 & 6 (outside center) 19
1.8
Between piers 5 & 6 (outside near pier 5) 20
Between piers 4 & 5 (outside) East Side Visitors Gallery 21
Between piers 4 & 5 (center) East Side Visitors Gallery E NA
Between pier 1 & 2 inside H
COUDE Between pier 1 & 2 inside J
COUDE Between pier 1 & 2 center K
COUDE Between pier 1 & 2 outside L
COUDE Between pier 7 & 8 center M
COUDE Between pier 7 & 8 outside N
COUDE Between pier 8 & 9 center O
COUDE Between pier 8 & 9 inside P
COUDE Between pier 8 & 9 outside 22
CONSOLE FLR
235
2.1
Between pier 2 & 3 (South side) 23
Between pier 2 & 3 (center side) 24 95
0.8
Between pier 1 & 2 (North Side) 25
between pier 10 & 1 (North side) 26
210
Between pier 9 & 10 (Rigth Side near 10) 27
Between pier 9 & 10 inside
All floor working 28 85
Between pier 9 & 10 center side 29
220
Between pier 9 & 10 outside 30
300
2.7
Between pier 98& 9 center side 31
320
2.8
Between pier 8 & 9 outside 32
230
2.0
Between pier 7 & 8 inside 33
265
2.3
Between pier 7 & 8 outside A
Hammerhead FLR
Center B C
Future installation D F
Between Pier 8 & 10 G
Gpm
50.4
17.4

6. Current Thermal Load
Building Cooling System (BCS) Capacity 30 T. R.
In use ~ 24 TON REF
Available ~ TON REF
Floor Cooling System (FCS) Capacity 10 T. R.
In use on floor ~ (65.5%) 6.5 TON REF
In use in oil cooling ??
Available~ ??
Total for both systems in use ~ TON REF

7. Thermal Requirements Future Demands
47.34 KW TON REF
32.61 KW TON REF
35.17 KW TON REF
KW TON REF ??
NEWFIRM & DECam Operation
Clean Room and DECAM
Computer & Console Room
Sub Total
Mirror cooling system
Total Current & Future demands ~ TON REF

8. Proposal to the Blanco 4m cooling capacity
Replace the 10 TON REF FCS unit by a 40 or 50 TON REF unit
(depending on the pipe diameter to be used to reduce glycol pressure drop
and high travel velocity in the glycol system
Replace the 2” Dia. Pipe of current 10 TON REF circuit to allow
larger cooling capacity unit (TBD)
Leave the new system only for FCS and telescope instrumentation
Replace the 30 TON REF analog control system for a new digital control unit
Leave the Console & Comp. Room cooling units in BCS circuit