Experimental investigation on filtration and cooling effect of kitchen hood ventilation system from water-mist recirculation spray: water mist spray cycle
A Water-mist spray system in several heavy-duty kitchen hood canopies is installed to efficiently control the high heat loads and grease emissions produced from the cooking process and for safety purposes. The main purpose of this study is to reduce water consumption by introducing the water-m...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Akademia Baru
2022
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/6907/ http://eprints.uthm.edu.my/6907/1/J13961_84cc800e88a040373c6f15c583a6f0a6.pdf |
| Summary: | A Water-mist spray system in several heavy-duty kitchen hood canopies is installed to
efficiently control the high heat loads and grease emissions produced from the cooking
process and for safety purposes. The main purpose of this study is to reduce water
consumption by introducing the water-mist recirculation system to replace the current
method water-mist system since it is working as water loss. A standard ASTM 2519 and
UL 1046 full-scaled experiment is developed in the laboratory. An existing Halton
Europe/Asian water-mist operating system is adopted in this study. Twelve (12) cycles (at
24 hours of water-mist activation) have been studied to determine the maximum water�mist activation cycle. The data are collected at two (2) hours water-mist activation at
every water-mist recirculation cycle. The water-mist spray fluids viscosity is 0.7 cP from
fresh water until the 4th cycle (8 hours water-mist spray) and increase 14.29% (0.8 cP) at
the 5th cycle to the 12th cycle. On average, the difference in gas emissions percentage for
CO concentration between fresh water until the 4th cycle is 10.81 – 18.92% while the CO2
concentration is 12.33 – 18.22%. On average, the difference in cooling effects percentage
for ducting temperature between fresh water until the 4th cycle is 5.55% while the hood
temperature is 2.33%. From the study, the water-mist recirculation system could save up
to 611,667 litres per year and 466,798.5 litres per year water for all U.S, European, and
Asian kitchen hood designs per hood length. By adopting the new water-mist recirculation
system to the current water-mist kitchen hood, the water operational cost for water
successfully reduced to RM 4,889.63 per year and RM 6,977.86 per year for U.S design
and European or Asian design per hood length respectively. The water-mist recirculation
system has great potential to improve the current water-mist system for the commercial
kitchen hood. |
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