ASHRAE Research Project 1480 Report - Food Service Technology ...

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Figure 23. Smoke Manifold for Three Charbroilers and Combination Appliance Line Figure 24. Smoke Manifold for Three Charbroilers during Test Conditions – Front and Rear Edge 2-23 RP-<strong>1480</strong>
The repeatability of capture and containment measurements at the CKV laboratory was investigated and the error was found to be below 14% with a typical error of about 7%. Repeatability of the visualization systems was adversely affected as the ambient air and thermal plumes approached similar temperatures. This occurred with the presence of dilution air, when thermal plume was relatively weak, or when the ambient conditions were above the normal operating range of 75 to 78 degrees Fahrenheit. Exhaust Air Flow to Supply Air Flow Comparison The CKV laboratory was designed to be airtight and was equipped with airflow metrology on the supply system. This configuration provided precise airflow rates to supply a kitchen system and provided the data necessary to calculate airflow rates. With airflow rates calculated to standard conditions, the airtight room provided measurable airflow for not only the supply system, but also for the exhaust system. To indirectly measure the exhaust airflow rate for each hood installation, the supply and exhaust systems were operated without cooking appliances turned on. The primary air supply system for the laboratory was set manually and the exhaust system automatically adjusted to maintain a 0 ± 0.002 inches of water pressure differential with respect to the air outside of the laboratory. The fan speeds and airflow data were recorded for up to ten airflow rates and then the motor speed of the exhaust fan was correlated with supply airflow rates. This relationship was incorporated into the laboratory control program, and allowed the operator to set an exhaust airflow rate by referencing the motor speed of the exhaust fan. While airflow rates are simple to correlate with appliances off, the actual supply and exhaust flow rates must change when appliances are turned on because the relatively cool air supplied to the room was heated while passing over the hot appliance. Since the room is airtight, one of the air systems must adjust to compensate for the change in air density and additional volume of air in the laboratory. For C&C testing, the laboratory operator always controlled the exhaust airflow rate and allowed the supply systems of the laboratory to modulate according to room pressure. This strategy provided a stable airflow at the hood and helped to prevent variations in hood performance that would not be present in the field. 2-24 RP-<strong>1480</strong>
Page 1 and 2: ASHRAE Research Project 1480 Island
Page 3 and 4: Table of Contents Acknowledgments..
Page 5 and 6: List of Figures Figure 1. Layout of
Page 7 and 8: Figure 69. Evaluation of Hood Side
Page 9 and 10: Preface It has been shown that the
Page 11 and 12: filter bank. That said, without a w
Page 13 and 14: Abstract The objective of this rese
Page 15 and 16: equired to achieve the reported hea
Page 17 and 18: Table 2. Makeup Air Sensitivity Tes
Page 19 and 20: Table 5. Negative Pressure Zone Tes
Page 21 and 22: Hood Specifications Island Hood Spe
Page 23 and 24: Single Island 10-Foot by 6-Foot V-B
Page 25 and 26: Double Island 10-Foot by 8-Foot Can
Page 27 and 28: Without Exhaust Collar Damper With
Page 29 and 30: Side Panel and Appliance Extension
Page 31 and 32: 4'-0" 3'-0" 3'-6" Figure 12. Side P
Page 33 and 34: Figure 14. Side Panel (84.0-inch to
Page 35 and 36: Ceiling Diffusers Both 4-way ceilin
Page 37 and 38: The discharge velocities were measu
Page 39 and 40: measured again. When the two system
Page 41: To challenge the capture performanc
Page 45 and 46: Combo (F,B,O) w/Panel #1 Front & Re
Page 47 and 48: Side Overhang For side overhang eva
Page 49 and 50: exhaust rate. However, this disadva
Page 51 and 52: Heavy-Duty (Three Broiler) Applianc
Page 53 and 54: Combination-Duty Appliance Line For
Page 55 and 56: Evaluation of Makeup Air Configurat
Page 57 and 58: Heavy-Duty (One Broiler) Appliance
Page 59 and 60: Combination-Duty Appliance Line For
Page 61 and 62: Evaluation of Dynamic Room Conditio
Page 63 and 64: Single Island V-Bank Canopy Hood, 6
Page 65 and 66: Heavy(2Broiler) 24" SOhang L&R Perf
Page 67 and 68: Side Overhang For side overhang eva
Page 69 and 70: Evaluation of Appliance Duty Evalua
Page 71 and 72: Evaluation of Side Panels The effec
Page 73 and 74: Combination-Duty Cook Line For the
Page 75 and 76: Evaluation of Makeup Air Configurat
Page 77 and 78: the hood, the air discharged from t
Page 79 and 80: Heavy-Duty (Two Broiler) Appliance
Page 81 and 82: Combination-Duty (Fryer, Broiler, O
Page 83 and 84: Evaluation of Dynamic Room Conditio
Page 85 and 86: Evaluation of Negative Pressure Are
Page 87 and 88: Comparison of Single Island Hood Pe
Page 89 and 90: Evaluation of Hood Size Relative to
Page 91 and 92: Evaluation of Hood Size Relative to
Page 93 and 94:
Evaluation of Hood Size Relative to
Page 95 and 96:
Page 97 and 98:
Double Island Canopy Hood, 8-Foot D
Page 99 and 100:
Evaluation of Hood Overhang Dimensi
Page 101 and 102:
Evaluation of Appliance Duty Sensit
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Heavy-Duty Front / Light-Duty Rear
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10000 > 9400 > 9400 8400 Exhaust Ai
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Heavy-Duty Three Broiler Front / Li
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Heavy-Duty Two Broiler Front / Ligh
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Evaluation of Negative Pressure Are
Page 113 and 114:
Evaluation of Biased Exhaust Airflo
Page 115 and 116:
Double Island Canopy Hood, 10-Foot
Page 117 and 118:
Evaluation of Hood Overhang Dimensi
Page 119 and 120:
Evaluation of Side Panels The effec
Page 121 and 122:
Displacement Ventilation The displa
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Displacement Ventilation While the
Page 125 and 126:
Having a negative pressure area nea
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With the exhaust collars completely
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Comparison of Double Island Hood Pe
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When exhaust rates were compared fo
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Page 137 and 138:
Conclusions Findings Exhaust rates
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plumes. Likewise, with up to 10,000
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Installation of a rear seal behind
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References 1. Brohard, G., D.R. Fis
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101 Displacement MUA 7'-8" 5'-8" Di
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113 Displacement MUA 5'-8" 2'-0" Si
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121 Displacement MUA 5'-8" Perforat
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125 8" 2'-10" Figure 107. Test Cond
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145 2'-10" Figure 127. Test Conditi
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153 1'-6" 2'-0" Walk-by Path Figure
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215 Displacement MUA 6'-8" 4'-8" Fr
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219 Displacement MUA 4' - 8" Front
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231 Displacement MUA 4'-8" Front Pe
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235 Displacement MUA 4'-8" Side Per
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239 Displacement MUA 4'-8" Front Pe
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243 4'-8" Displacement MUA Perforat
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255 1'-6" 1'-6" 3'-6" Figure 191. T
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259 1'-6" 1'-6" 3'-6" Figure 195. T
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267 Figure 203. Test Condition 267
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271 1'-6" 1'-6" 3'-6" Figure 207. T
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275 Exhaust Air 6'-8" 4'-8" Displac
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279 Displacement MUA 4'-8" Walk-by
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303 3'-8" Displacement MUA 5'-8" Di
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307 3'-8" Displacement MUA 5'-8" Di
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315 Displacement MUA 3' - 8" 5' - 8
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323 Displacement MUA 3' - 8" Perfor
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327 Displacement MUA 3' - 8" Perfor
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331 Displacement MUA 3' - 8" Partit
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335 Displacement MUA 3' - 8" 2'-0"
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339 Exhaust Air 3' - 8" 5' - 8" Dis
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343 Exhaust Air 3' - 8" Partition 5
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413 Displacement MUA 2' - 8" PPS MU
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417 Exhaust Air 2' - 8" Partition 4
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421 2' - 8" 4' - 8" Displacement MU
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The laboratory uses floor-standing
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. Brick outside wall Lab door Optic
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Food Service Technology Center (FST
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B-8 RP-1480
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