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SLAC MMF PROJECT

Detailed description of the mechanical system for SLAC MMF project, including layouts, equipment, cooling and heating calculations. 8

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SLAC MMF PROJECT

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  1. SLAC MMF PROJECT MECHANICAL SYSTEM DESCRIPTION October 14, 2004 Ben Entezam SLAC MMF Mechanical System Ben.Entezam@Jacobs.com

  2. SAFETY?

  3. SLAC FLOOR LAYOUT W/ DESIGN TEMP. PARAMETERS MMF ±0.1°C CMM ±1.0°C STORAGE ± 2.5°C

  4. MECHANICAL ROOM UNIT LAYOUT AHU-3 AHU-2 AHU-1 MAU-1 AHU-1 AND MAU-1 SERVING MMF AHU-2 SERVING CMM AHU-3 SERVING LOAD DOCK

  5. ITEM NO. 1 2 3 4 5 6A 6B 7 8A 8B 9 10 11 12 13 HEAT SOURCE POWER SUPPLY MAGNET ELECTRONICS RACK COMPUTER (2) TWO ELECTRONIC RACKS LINEAR MOTOR X-Y STAGES (2) TWO ELECTRONIC RACKS LINEAR MOTOR X-Y STAGES COMPUTER COMPUTER PRINTER ELECTRONIC RACK COMPUTER (3) THREE PEOPLE TOTAL COOLING LOADS (BTU/HR) LCW WATER LCW WATER 5,115 1,705 10,230 3,410 3,410 10,230 1,783 3,410 1,705 1,705 1,705 5,115 1,705 1,023 = 52,251 1 2 3 4 6A/6B 5 5 9 7 7 8A/8B 10 12 13 MMF HEAT SOURCE LOCATION 11

  6. SUPPLY AIR TO AHU-1 OUTSIDE AIR FILTER SECTION FILTER SECTION 30% PREHEATING COIL FILTER SECTION 65% SUPPLY FAN COOLING COIL HEATING COIL HUMIDIFIER MAKE-UP AIR UNIT (MAU-1)

  7. 99,360 85,440 2,000*60*54 CFM*60*ΔG 10,000 5,000 13.5*7,000 13.5*7,000 MAKE-UP AIR UNIT (MAU-1) SUPPLY AIR 70°F 2,000 CFM OUTSIDE AIR 26°F WINTER 95°F SUMMER 2,000 CFM Q1= 1.08 * CFM * ΔT Q1 = SENSIBLE HEAT (BTU/HR) CFM = CUBIC FEET PER MINUTE ΔT = TEMPERATURE DIFFERENCE (°F) Q2= 0.68 * CFM * ΔG Q2 = LATENT HEAT (BTU/HR) CFM = CUBIC FEET PER MINUTE ΔG = GRAIN/LB DIFFERENCE (°F) PREHEATING COIL (PREHEAT) = 1.08 * 2,000 * 10 = 21,600 BTU/HR HEATING COIL = 1.08 * 2,000 * 36 = 77,760 BTU/HR COOLING COIL (Q1) = 1.08 * 2,000 * 32 = 69,120 BTU/HR (7 DEGREE MOTOR LOAD) COOLING COIL (Q2) (DEHUMIDIFICATION) = 0.68 * 2,000 * 12 = 16,320 BTU/HR (ΔG = 12) TOTAL COOLING = 69,120 + 16,320 = 85,440 BTU/HR = APPROX. 7½ TONS COOLING HUMIDIFICATION = = = 69 LBS/HR HOT WATER GPM = = 9.9 GPM ~ 10 GPM CHILLED WATER GPM = = 17 GPM

  8. AIR HANDLING UNIT (AHU-1) RETURN AIR FILTER SECTION SUPPLY FAN TEMPERED CHILLED WATER COIL TEMPERED HOT WATER COIL MAKE-UP AIR 70°F SUPPLY AIR 69.85°F

  9. 4,539 = 23,348 CFM ~ 24,000 CFM CFM = 1.08*0.18 AIR HANDLING UNIT (AHU-1) RETURN AIR 73°F 22,000 CFM MAKE-UP AIR 70°F 55%RH 2,000 CFM SUPPLY AIR 69.82°F 24,000 CFM AIR FLOW CALCULATION (INTERIOR LOADS) LIGHTING = 3,410 BTU/HR PEOPLE = 454 BTU/HR ROOF = 675 BTU/HR TOTAL = 4,539 BTU/HR SURROUNDING AREA EQUIPMENT LOADS EQUIPMENT = 52,251 BTU/HR LIGHTING = 8,000 BTU/HR ROOF = 1,000 BTU/HR TOTAL = 61,251 BTU/HR SURROUNDING AREA TEMPERATURE RISE 61,251 = 3°F ΔT = 1.08*0.7*24,000

  10. AIR HANDLING UNIT (AHU-1) CONT. RETURN AIR 73°F 22,000 CFM MAKE-UP AIR 70°F 55%RH 2,000 CFM SUPPLY AIR 69.82°F 24,000 CFM COOLING LOADS EQUIPMENT = 52,251 BTU/HR LIGHTING = 8,000 BTU/HR ROOF = 1,000 BTU/HR (0.033 * 25.1224 = 1,000 BTU/HR) FAN HEAT = 24,000 * 1.08 * 2.45 = 63,504 BTU/HR (20 HP) TOTAL = 124,755 BTU/HR / 12,000 = 10.4 TONS (TCW COIL) BTU/HR 124,755 = 83 GPM ΔT = 3°C GPM = = 500 * ΔT 1,500 HEATING LOADS REHEAT COIL = 24,000*1.08*3 = 77,760 BTU/HR (THW COIL) 77,760 ΔT=20°F GPM = = 7.7 GPM 500*20 77,760 ΔT=4°F GPM = = 38 GPM 500*4

  11. MMF FLOOR LAYOUT (DIFFUSERS)

  12. HOT WATER PUMPS TEMPERED HOT WATER PUMPS BOILER 300,000 BTU/HR CHILLEDWATER PUMPS HEAT EXCHANGER TEMPERED CHILLED WATER PUMPS CHILLER 45 TON HEAT EXCHANGER AHU-1 MAU-1 MMF FLOW DIAGRAM

  13. RETURN AIR OUTSIDE AIR FILTER SECTION 30% FILTER SECTION 65% VAV-1 VAV-2 VAV-3 VAV-4 SUPPLY FAN COOLING COIL HEATING COIL HUMIDIFIER AIR HANDLING UNIT (AHU-2) SUPPLY AIR

  14. RETURN AIR FILTER SECTION FILTER SECTION 30% FILTER SECTION 65% COOLING COIL HEATING COIL SUPPLY FAN AIR HANDLING UNIT (AHU-3) SUPPLY AIR OUTSIDE AIR

  15. AHU-3 AHU-2 HOT WATER PUMPS BOILER 300,000 BTUHR TEMPERED HOT WATER PUMPS HEAT EXCHANGER CHILLED WATER PUMPS CHILLER 45 TON TEMPERED CHILLED WATER PUMPS HEAT EXCHANGER FLOW DIAGRAM MAU-1 AHU-1

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