IDEA University
and College
Conference
February 6-9, 2012
University of Maryland, College Park Site Tours
John Vucci
University of Maryland
Chiller Plant Tour
• The University of Maryland to progress towards a
more sustainable campus controlling energy
consumption and global reduction of carbon has
began a program of measurement, verification and
control of chiller plant energy consumption.
• To accommodate this change principles of M&V
identified within ASHRAE Guideline 22 are being
implemented in a pragmatic program by the HVAC
Systems group
• Bottom line in order to control energy an owner
must measure the energy.
University of Maryland
Chiller Plant Tour
• Implementation of this M&V to be followed by
control of Satellite Central Utility Plants (SCUB’s)as
well as other phased existing Plants will occur.
• To demonstrate this Program several examples of
various sites have been identified.
• The use of energy efficient technologies along with
M&V are to be emphasized to tour attendees.
• Samples of data acquisition and plant schematics
taken from several plant are presented.
Fundamental Principles
Primary Secondary Chiller Plant Concept
Showing sensor and input points for energy
efficiency and BTUH consumption Monitoring
and Comparison for Chiller Plant
Oakland Hall SCUB
plant start up April 2011
800 Ton
Electric VFD
Drive
3ft. clearance
1,000 Ton
Variable, Auto
Start Steam
Turbine Drive
6 Ft. Clearance
Ultimate Build out 3,800 Tons. Present capacity firm 1- 800 TR VFD
Electric, 1- 1,000 TR Variable Steam Drive and 1 – 2,000 TR Future
Electric VFD Drive. Plant design Concept is Variable Primary – Variable
Secondary matching flow requirements of Plant Production and
Distribution.
Oakland Hall SCUB
CHW System
01/15/12 Plant OFF – No
Cooling Load in present
four connected buildings
Oakland Hall SCUB
CW System
Energy Data not
graphically available
Similar to the design – build issues identified with physical installation for the SCUB plant the ATC
infrastructure was installed however the D/B engineer and contractor did not grasp the
University concept for M&V information identified in the Technical Program Narrative. The
information is not consolidated and displayed for baseline measurement and owner use.
Presently the University, having accepted ownership is modifying the data acquisition to
provide trending baseline measurement of SCUB Plant performance
Tawes SCUB V Chilled Water Plant
Quantity 2, 675 Ton Centrifugal Chillers with
factory packaged VFD’s and Hot gas Bypass.
Plant includes a remote 350 Ton Centrifugal
Chiller with VFD drive for shoulder and
winter operation. Plant Design Concept is
Constant Primary – Variable Secondary.
Tawes SCUB V
CHW System – OFF
0 TR @ 0 KW
Plant Firm Chiller Capacity @
Qty. 2- 375 TR VFD Driven
Chillers w/ Remote 350 TR
Chiller at Benjamin Hall
01/15/12 Main Plant . O
ATC auto Changeover
Benjamin Hall Chiller
Tawes SCUB V CHW
Remote Chiller – 350 TR
Benjamin Hall
(45.1-40.8) oF x 905 GPM =162.15 Tons
24
Tawes SCUB V
CW System - OFF
Hot Gas
Bypass
Chiller 1
CSS Wing 2.0 Chiller Plant –
Qty. 2 375 Ton Chillers each
with VFDs and Controlled Hot
Gas Bypass
CSS Wing 2.0 Chiller
Plant – Qty. 2 375 Ton
Chillers each with
VFDs and Controlled
Hot Gas Bypass
2010 Retrofit upgrade from original 1964 CHW plant of 2- 150 Ton
Screw chillers @ nominal .9 KW/TR to 2 – 375 Ton R-134a VFD
centrifugal chillers serving multiple facilities initially 3 building
wings (@ est. 350 Tons) with N+1. Each chiller designed at .35 KW/TR
IPLV. Plant Design is Constant Primary – Variable Secondary Flow.
CSS W 2.0 CHW System
01/15/12 Plant Operation providing 130 TR t
center . Remaining load provided primarily
Laser & research labs.
Present Plant has firm capacity of qty. 2 – 375 Ton chillers each with electric VFD
drives. Present Plant is connected to new CSS SCUB Plant upgrade to consist of qt
5 800 Ton chillers . Wing 2.0 plant to cycle automatically to provide low load winte
CHW to connected buildings and research process loads when complete.
CSS W 2.0 CW System
(45.9-41) oF x 750 GPM =153.13 Tons
24
69 KW
.45 KW/TR
153.13 TR
(66.4-62) oF x 1,125 GPM =206.25 Tons
24
206.25 Tons CW
153.13 TR CHW =
TR Heat Rejection
Marie Mount Hall SCUB
ATC Upgrade Under Construction
Bill of Materials
Chilled Water Loop System Flow
Sheet Notes:
1
Prim. CH1 Iso. VLV Status (ES-CHW-ISO1)
137
0-1-DI07
CONFIRM MIN, MAX AND OPERATING PRESSURE PRIOR
TO ORDERING PRESSURE SENSOR.
Prim. CHWS Temp (TT-PCHWS)
0-1-AI02
9
127
9
DID
CS-V06
DPT-S01
REL-V1
DESCRIPTION
CURRENT SWITCH 3-135 SPLIT CORE
WET DP 4-20 MA TRANSMITTER WITH 5 VALVE BYPASS ASM.
SPDT ENCLOSED RELAY 10-30VAC / DC, 120VAC
MANUFACTURER
VERIS IND.
SETRA
VERIS
PART NUMBER
H-908
M230-025PD-C-BVA
V100
QTY
7 ea
2 ea
4 ea
VA-X
WS-B08
WS-B11
2 SPDT MECH. END SWITCHES 10A AT 125/250 VAC
10K IMMERSION THERMISTER SENSOR 4IN. BAPI BOX2
TWP PART SS WELL 4IN.
DEZURIK
BAPI
BAPI
ACC*SEH90
BA/10K-2-I-4-BB2
BA/4IN.
3 ea
9 ea
9 ea
Wired To Primary CHW BTU Meter
SEE CHW
FLOW
VA-X
York
...--.-.
Interface
-..--|-.:
:::|-||--.
Sec. CHWS Temp (TT-SCHWS1)
0-1-AI12
SEE CHW
FLOW
CH-1
147
9
Wired To Main CHW BTU Meter
PCHWP-4
Sec. Main CHWS Temp (TT-SCHWS2)
151
0-1-AI14
A
F
Sec. Main CHWP-4 Status (CS-P4)
159
0-2-DI02
CS-V06
9
VFD
C
REL-V1
To Chiller-2
PCHWP-1
A
CS-V06
Prim. CHWP-1 Status (CS-P1)
131
0-1-DI04
9
Prim. CH2 Iso. VLV Status (ES-CHW-ISO2)
139
0-1-DI08
9
VA-X
PCHWP-2
Prim. CHWP-2 Status (CS-P2)
133
0-1-DI05
9
A
D
F
York
...--.-.
Interface
-..--|-.:
:::|-||--.
Sec. Main CHWP-5 Status (CS-P5)
161
0-2-DI03
CS-V06
157
Sec. Main CHW DP (DPT-MAIN-SCUB)
0-2-AI01
1
9
VFD
C
SEE CHW
FLOW
REL-V1
Sec. Main CHWP-5 S/S (CS-P5)
322
0-1-DO06
Sec. Main CHWP-5 Speed (CS-P5)
324
0-1-AO05
9
Starter
9
SECONDARY LOOP OF REMOTE BUILDING
A
DPT-S01
WS-B11
WS-B08
D
CH-2
CS-V06
9
9
PCHWP-5
WS-B11
WS-B08
SEE CHW
FLOW
Sec. Main CHWP-4 S/S (CS-P4)
326
0-1-DO04
Sec. Main CHWP-4 Speed (CS-P4)
328
0-1-AO03
See VFD Integration Riser
Starter
Wired To CH-1
HI
D
From LGR 250
9
See VFD Integration Riser
Wired To MM CHW BTU Meter
PCHWP-1
From Chiller-1
Sec. MM CHWS Temp (TT-SCHWS3)
163
0-2-AI04
Wired To CH-2
To Chiller-3
Prim. CH3 Iso. VLV Status (ES-CHW-ISO3)
0-1-DI09
141
A
F
9
Sec. MM CHWP1 Status (CS-P1)
0-2-DI07
CS-V06
169
9
9
WS-B11
WS-B08
VFD
PCHWP-3
D
HI
C
REL-V1
A
CS-V06
Prim. CHWP-3 Status (CS-P3)
135
0-1-DI06
9
SEE CHW
FLOW
Starter
VA-X
Sec. MM CHWP1 S/S (CS-P1)
318
0-1-DO08
Sec. MM CHWP1 Speed (CS-P1)
0-1-AO07
See VFD Integration Riser
York
...--.-.
Interface
-..--|-.:
:::|-||--.
DPT-S01
9
A
F
9
145
9
9
PCHWP-2
SEE CHW
FLOW
CH-3
319
CS-V06
Sec. MM CHWP2 Status (CS-P2)
0-2-DI08
VFD
CHW Bypass Flow (FM-BYPASS)
0-1-AI11
9
165
167
171
Sec. MM CHW DP (DPT-MM-SCUB)
0-2-AI06
1
9
Sec. MM CHWR Temp (TT-SCHWR3)
0-2-AI05
046 MARIE MOUNT
Wired To CH-3
9
WS-B11
WS-B08
C
Sec. MM CHWP2 S/S (CS-P2)
338
0-2-DO02
WS-B11
WS-B08
9
143
Sec. MM CHWP2 Speed (CS-P2)
0-2-AO01
Prim. CHWR Bypass Temp (TT-BYPASS)
0-1-AI10
340
9
9
WS-B11
WS-B08
D
See VFD Integration Riser
D
LO
LO
Prim. CHWR Temp (TT-PCHWR)
0-1-AI03
129
9
9
Sec. CHWR Temp (TT-SCHWR1)
0-1-AI13
WS-B11
WS-B08
D
WS-B11
WS-B08
D
153
149
UMCP Marie Mount SCUB
Sec. Main CHWR Temp (TT-SCHWR2)
0-1-AI15
College Park, Maryland
9
Chilled Water Loop System Flow
WS-B11
WS-B08
D
REV: 0
Submittal
11/23/2011
JOB NO: J11116
PM: JF
E.M.S. Technologies Inc.
2134 Espey Court Suite # 9
Crofton, Maryland 21114
Eng: HA
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