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Mobile QR Code QR CODE : Korean Journal of Air-Conditioning and Refrigeration Engineering

  1. ์ธ์ฒœ๋Œ€ํ•™๊ต ๊ธฐ๊ณ„์‹œ์Šคํ…œ๊ณตํ•™๋ถ€ (Division of Mechanical System Engineering, Incheon National University, Incheon 22012, Korea)



์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ(Premixed Burner), ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ(Cylindrical Premixed Burner), ์ผ์‚ฐํ™”ํƒ„์†Œ(CO), ์งˆ์†Œ์‚ฐํ™”๋ฌผ(NOx), ์—ดํšจ์œจ(Thermal Efficiency)

๊ธฐํ˜ธ์„ค๋ช…

ฯ†๏ผš๋‹น๋Ÿ‰๋น„
ฮท๏ผš์—ดํšจ์œจ

1. ์„œ๋ก 

ํ™”์„์—ฐ๋ฃŒ๋Š” ์‚ฐ์—…ํ˜๋ช… ์ดํ›„ ์˜ค๋žœ ์‹œ๊ฐ„๋™์•ˆ ์‚ฐ์—…๋ฐœ์ „์˜ ์›๋™๋ ฅ์œผ๋กœ ์‚ฌ์šฉ๋˜๊ณ  ์žˆ๋‹ค. ์ตœ๊ทผ ๋“ค์–ด ํ™”์„์—ฐ๋ฃŒ์˜ ์—ฐ์†Œ๊ณผ์ •์—์„œ ๋ฐœ์ƒ๋˜๋Š” ๋‹ค์–‘ํ•œ ๋ฐฐ๊ธฐ๊ฐ€์Šค์— ๋Œ€ํ•œ ๋ฌธ์ œ์ ์ด ์ „ ์„ธ๊ณ„์ ์œผ๋กœ ๋Œ€๋‘๋˜๊ณ  ์žˆ๋‹ค. ์ด๋Ÿฌํ•œ ๋ฌธ์ œ์ ์„ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์—ฐ์†Œ๊ณผ์ •์—์„œ ๋ฐœ์ƒ๋˜๋Š” ์˜ค์—ผ๋ฌผ์งˆ์„ ๊ทผ๋ณธ์ ์ธ ๊ฐ์†Œ๋ฅผ ์œ„ํ•˜์—ฌ ์ €๊ณตํ•ด ์—ฐ์†Œ๊ธฐ์ˆ ์— ๋Œ€ํ•œ ๋งŽ์€ ์—ฐ๊ตฌ๋“ค์ด ์ง„ํ–‰๋˜๊ณ  ์žˆ๋‹ค.(1-3)

๋Œ€ํ‘œ์ ์ธ ๋ณด์ผ๋Ÿฌ ์„ ์ง„๊ตญ์ธ ์œ ๋Ÿฝ์—์„œ๋Š” ์ง€๊ตฌ์˜จ๋‚œํ™” ๋ฐฉ์ง€ ๋ฐ ์—๋„ˆ์ง€ ํšจ์œจ์˜ ๊ทน๋Œ€ํ™”๋ฅผ ์œ„ํ•˜์—ฌ ์‘์ถ•๋ณด์ผ๋Ÿฌ์˜ ์„ค์น˜๋ฅผ ์ ์ฐจ์ ์œผ๋กœ ์˜๋ฌดํ™”ํ•˜๊ณ  ์žˆ๋‹ค. ๋˜ํ•œ ๋ฏธ๋ž˜์˜ ๋ณด์ผ๋Ÿฌ ์ตœ๋Œ€์‹œ์žฅ์œผ๋กœ ์˜ˆ์ƒ๋˜๋Š” ์ค‘๊ตญ์—์„œ๋„ ๊ฐ€์Šค๋ณด์ผ๋Ÿฌ์˜ ๊ธฐ์ˆ  ์ˆ˜์ค€์„ EN ๊ทœ๊ฒฉ์œผ๋กœ ๊ฒฐ์ •ํ•˜์—ฌ ๊ธ€๋กœ๋ฒŒ ๊ฒฝ์Ÿ๋ ฅ์„ ๊ฐ€์ง„ ๊ณ ํšจ์œจ ์ €๊ณตํ•ด ๋ณด์ผ๋Ÿฌ์šฉ ์—ฐ์†Œ๊ธฐ์˜ ๊ฐœ๋ฐœ์ด ํ•„์š”ํ•œ ์‹œ์ ์ด๋‹ค.

๊ฐ€์ •์šฉ ๊ฐ€์Šค๋ณด์ผ๋Ÿฌ์˜ ์—ฐ์†Œ๋ฐฉ์‹์œผ๋กœ ๊ฐ€์žฅ ๋งŽ์ด ์‚ฌ์šฉ๋˜๊ณ  ์žˆ๋Š” Fig. 1๊ณผ ๊ฐ™์€ ๋ถ„์  ๋ฐฉ์‹์€ ์—ฐ์†Œํ™”์—ผ์€ ๋‹ค์ค‘ํ™”์—ผํ˜•ํƒœ๋กœ ๋…๋ฆฝ๋˜์–ด ์žˆ์–ด ์—ฐ์†Œํ™”์—ผ์˜ ์•ˆ์ •์„ฑ์ด ๋†’์€ ์žฅ์ ์„ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค. ํ•˜์ง€๋งŒ ์—ฐ์†Œํ™”์—ผ์˜ ๊ธธ์ด๊ฐ€ ๊ธธ๊ฒŒ ํ˜•์„ฑ๋˜์–ด ๋ถ€๋ ฅ์˜ ์˜ํ–ฅ์„ ๋ฐ›์•„ ์ƒํ–ฅ์‹์œผ๋กœ๋งŒ ์ ์šฉ์ด ๊ฐ€๋Šฅํ•˜๊ณ  ๊ท ์ผํ•œ ์˜จ๋„๋ถ„ํฌ๋ฅผ ์–ป๊ธฐ ์œ„ํ•ด์„œ๋Š” ๋ฒ„๋„ˆ๋กœ๋ถ€ํ„ฐ ์—ด๊ตํ™˜๊ธฐ๊นŒ์ง€ ์ถฉ๋ถ„ํ•œ ๊ฑฐ๋ฆฌ๋ฅผ ํ™•๋ณดํ•ด์•ผํ•œ๋‹ค. ๋˜ํ•œ ๋ถ„์  ํ™”์—ผ๋ฐฉ์‹์€ ๊ณผ๋† ํ˜ผํ•ฉ๋น„์—์„œ ๊ณต์—ฐ๋น„๊ฐ€ ์ •ํ•ด์ง€๋ฏ€๋กœ ํฌ๋ฐ• ์˜ˆํ˜ผํ•ฉ ์—ฐ์†Œ๋ฅผ ํ†ตํ•œ ์ € CO ๋ฐ NOx์˜ ์‹คํ˜„์— ์žˆ์–ด ์–ด๋ ค์›€์„ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค.(4-5)

Fig. 1. Flame patterns of Bunsen burner.
../../Resources/sarek/KJACR.2017.29.7.350/fig1.png

๋ถ„์  ๋ฐฉ์‹์˜ ๋ฌธ์ œ์ ์„ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์™„์ „์—ฐ์†Œ ๋ฐ ๊ท ์ผ ๊ฐ€์—ดํŠน์„ฑ์„ ํšจ๊ณผ์ ์œผ๋กœ ์–ป๊ธฐ ์œ„ํ•œ ์—ฐ์†Œ์žฅ์น˜๋กœ์„œ ๋‹ค๊ณต์„ฑ์žฌ์งˆ(Porous Media)์„ ์ ์šฉํ•˜๋Š” ์˜ˆํ˜ผํ•ฉ ์—ฐ์†Œ์‹œ์Šคํ…œ์— ๋Œ€ํ•œ ์—ฐ๊ตฌ๊ฐ€ ์ง„ํ–‰๋˜๊ณ  ์žˆ๋‹ค. ๋‹ค๊ณต์„ฑ์žฌ์งˆ์„ ์ ์šฉํ•˜๋Š” ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ๋Š” ๋‹ค๊ณต์„ฑ ์žฌ๋ฃŒ๋ฅผ ํ†ตํ•˜์—ฌ ์œ ์ž…๋˜๋Š” ์—ฐ๋ฃŒ-๊ณต๊ธฐ ์˜ˆํ˜ผํ•ฉ ๊ฐ€์Šค๊ฐ€ ๋ฐ˜์‘์˜์—ญ์„ ํ†ต๊ณผํ•˜๋ฉด์„œ ์—ฐ์†Œ๋˜๊ณ , ์—ฐ์†Œ์—ด์˜ ์ผ๋ถ€๋Š” ๋†’์€ ์—ด์ถ•์ ๋ฅ ์„ ๊ฐ–๋Š” ๋‹ค๊ณต์„ฑ์žฌ์งˆ์— ์ถ•์ ๋˜์–ด ๊ณ ์—๋„ˆ์ง€ ํ™˜๊ฒฝ์—์„œ ์—ฐ์†์—ฐ์†Œ๊ฐ€ ๊ฐ€๋Šฅํ•˜๊ฒŒ ๋˜์–ด ์™„์ „์—ฐ์†Œ๋ฅผ ์ด๋ฃฐ ์ˆ˜ ์žˆ๋‹ค๊ณ  ์•Œ๋ ค์ ธ ์žˆ๋‹ค.(6)

์ด๋Ÿฌํ•œ ๋‹ค๊ณต์„ฑ์žฌ์งˆ์€ Fig. 2์™€ ๊ฐ™์ด Metal Fiber, ์„ธ๋ผ๋ฏน ํƒ€์ผ, ๋‹ค๊ณต์ฒ ํŒ ๋“ฑ์ด ์žˆ๊ณ  ์ด๋Ÿฌํ•œ ๋‹ค๊ณต์„ฑ์žฌ์งˆ์„ ํ™œ์šฉํ•˜์—ฌ ์‘์ถ•๊ฐ€์Šค๋ณด์ผ๋Ÿฌ์šฉ ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ๋ฅผ ๊ฐœ๋ฐœํ•˜๋Š” ๋งŽ์€ ์—ฐ๊ตฌ๋“ค์ด ์ง„ํ–‰๋˜๊ณ  ์žˆ๋‹ค.(7-9)

์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์— ์ ์šฉ๋˜๋Š” ๋Œ€ํ‘œ์ ์ธ ๋‹ค๊ณต์„ฑ์žฌ์งˆ์ธ Metal-Fiber์˜ ๊ฒฝ์šฐ Fig. 2(a)์™€ ๊ฐ™์ด ๊ธˆ์†์„ฌ์œ ๋ฅผ ์ง์กฐํ•œ ํ˜•ํƒœ๋กœ ๋˜์–ด ์žˆ๊ณ  ์˜ˆํ˜ผํ•ฉ ํ‘œ๋ฉดํ™”์—ผ์„ ํ˜•์„ฑํ•˜๋Š” ๊ฐ€๋™์กฐ๊ฑด์—์„œ ๋งค์šฐ ๋†’์€ ๋ถ€ํ•˜๋น„(Turn Down Ratio)๋ฅผ ํ˜•์„ฑํ•  ์ˆ˜ ์žˆ๋Š” ์žฅ์ ์„ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค. ํ•˜์ง€๋งŒ ์—ฐ์†Œํ™”์—ผ์ด Fig. 2(a)์™€ ๊ฐ™์ด Metal-Fiber์— ์ง์ ‘ ๋‹ฟ๊ฒŒ ๋˜์–ด ์ ์—ด(Radiation)์ด ๋ฐœ์ƒ๋˜์–ด ์—ด ๊ฒฝํ™”ํ˜„์ƒ์ด ๋ฐœ์ƒํ•  ์ˆ˜ ์žˆ๊ณ  ์—ดํŒฝ์ฐฝ์œผ๋กœ ์ธํ•˜์—ฌ Metal-Fiber์˜ ์ฒ˜์ง ํ˜„์ƒ์ด ๋ฐœ์ƒ๋˜๋Š” ๋‹จ์ ์„ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค.

๋†’์€ ์—ด์  ๋‚ด๊ตฌ์„ฑ์„ ๊ฐ€์ง€๊ณ  ์žˆ์œผ๋ฉฐ ๊ฐ€๊ฒฉ์ด ์ €๋ ดํ•œ Fig. 2(b)์˜ ์„ธ๋ผ๋ฏน ํƒ€์ผ์˜ ๊ฒฝ์šฐ ์˜ˆํ˜ผํ•ฉ ํ™”์—ผ ํ˜•์„ฑ์— ์žˆ์–ด Fig. 2(b)์™€ ๊ฐ™์ด ๋งค์šฐ ์•ˆ์ •์ ์ธ ์—ฐ์†Œํ™”์—ผ์˜ ํ˜•์„ฑ๊ณผ ๋งค์šฐ ๋†’์€ ์—ดํšจ์œจ์ด ๊ฐ€๋Šฅํ•˜๋‚˜ ์ทจ์„ฑ์ด ์•ฝํ•ด ๊นจ์–ด์ง€๋Š” ๋‹จ์ ์„ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค.(10)

ํ•˜์ง€๋งŒ Fig. 2(c)์™€ ๊ฐ™์ด ๋‹ค๊ณต์ฒ ํŒ์„ ํ™œ์šฉํ•œ ์›ํ†ตํ˜• ๋ฒ„๋„ˆ ๊ฒฝ์šฐ ๊ธˆ์†์žฌ์งˆ์˜ ๋ถ„ํฌํŒ๊ณผ ์—ผ๊ณต์œผ๋กœ ์›ํ†ตํ˜• ๋ฒ„๋„ˆ๋ฅผ ๊ตฌ์„ฑํ•˜๊ธฐ ๋•Œ๋ฌธ์— ๋†’์€ ๋‚ด๊ตฌ์„ฑ, ๊ฐ•ํ•œ ์ทจ์„ฑ, ๋‚ฎ์€ ๊ฐ€๊ฒฉ์˜ ์žฅ์ ์„ ๊ฐ€์ง€๊ณ  ์žˆ๊ณ  ์•ˆ์ •์ ์ธ ์˜ˆํ˜ผํ•ฉ ์—ฐ์†Œํ™”์—ผ์„ ํ˜•์„ฑํ•  ์ˆ˜ ์žˆ๋Š” ์žฅ์ ์„ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค.(11)

Fig. 2. Comparison of Porous media and Flame patterns for premixed combustor.
../../Resources/sarek/KJACR.2017.29.7.350/fig2.png

์ด๋Ÿฌํ•œ ๋‹ค๊ณต์ฒ ํŒ์„ ์ ์šฉํ•˜์—ฌ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์—ฐ๊ตฌ์˜ ๊ฒฝ์šฐ Zhao et al.(12)์— ์˜ํ•ด์„œ ์ด์ ํ„ฐ(Ejector)๋ฅผ ์ ์šฉํ•˜๋Š” ๋ฐฉ์‹์œผ๋กœ ํ†ตํ•˜์—ฌ ์—ฐ์†Œ์•ˆ์ •์„ฑ์„ ํ™•๋ณดํ•˜๋Š” ์—ฐ๊ตฌ์™€ Lee et al.(11)์— ์˜ํ•˜์—ฌ Mesh์™€ ๋‹ค๊ณตํŒ์œผ๋กœ ํ˜•์„ฑ๋œ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ๋ฅผ ์ ์šฉํ•˜์—ฌ ๊ฐ€๋™์กฐ๊ฑด ๋ฐ ์—ฐ๋ฃŒ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ๋ฐฐ๊ธฐ๊ฐ€์Šค ๋ฐฐ์ถœ ํŠน์„ฑ ๋ฐ ์—ฐ์†Œํ™”์—ผ์˜ ์•ˆ์ •์„ฑ์„ ๋ถ„์„ํ•˜๋Š” ์—ฐ๊ตฌ๊ฐ€ ์ง„ํ–‰๋˜์—ˆ๋‹ค.

๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ์ตœ์ ํ™”๋œ ๊ธˆ์†์žฌ์งˆ์˜ ๋ถ„ํฌํŒ(Baffle Plate)๊ณผ ์—ผ๊ณต(Flame Holes)์œผ๋กœ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ๋ฅผ ๊ตฌ์„ฑํ•˜๊ณ  ๋ถ„ํฌํŒ ๋ฐ ์—ผ๊ณต๋ณ€ํ™”์— ๋”ฐ๋ฅธ ์—ฐ์†ŒํŠน์„ฑ, ๋ฐฐ๊ธฐ๊ฐ€์Šค ๋ฐฐ์ถœ ๋ฐ ์—ดํšจ์œจ ๋ถ„์„์„ ํ†ตํ•˜์—ฌ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ๊ฐ€์ •์šฉ ์‘์ถ•๋ณด์ผ๋Ÿฌ์— ์ ์šฉํ•˜๊ธฐ ์œ„ํ•œ ์—ฐ๊ตฌ๋ฅผ ์ง„ํ–‰ํ•˜์˜€๋‹ค.

2. ์‹คํ—˜์žฅ์น˜ ๋ฐ ๋ฐฉ๋ฒ•

2.1 ์—ฐ๋ฃŒ/๊ณต๊ธฐ ํ˜ผํ•ฉ์žฅ์น˜์˜ ๊ตฌ์„ฑ

์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์—ฐ๋ฃŒ/๊ณต๊ธฐ ํ˜ผํ•ฉ์žฅ์น˜์˜ ๊ฒฐ์ •์€ ์—ฐ๋ฃŒ ๋ฐ ๊ณต๊ธฐ์˜ ์˜ˆํ˜ผํ•ฉ๊ณผ ์ ์ ˆํ•œ ์••๋ ฅ๊ฐ•ํ•˜๋ฅผ ํ˜•์„ฑํ•˜๋Š”๋ฐ ๋งค์šฐ ์ค‘์š”ํ•œ ์ธ์ž๋กœ ์ž‘์šฉ๋œ๋‹ค. ๋ณธ ์—ฐ๊ตฌ์—์„œ ์—ฐ๋ฃŒ ๊ณต๊ธฐ ํ˜ผํ•ฉ์žฅ์น˜๋กœ ์‚ฌ์šฉ๋œ AGM(Air Gas Mixer)์€ ์˜ˆํ˜ผํ•ฉ Fan ํšŒ์ „ ์ค‘์‹ฌ๋ถ€์— ์—ฐ๋ฃŒ๊ณต๊ธ‰ํ•˜๊ณ  ์˜ˆํ˜ผํ•ฉ Fan์˜ ํšŒ์ „์„ ํ†ตํ•˜์—ฌ ์—ฐ๋ฃŒ/๊ณต๊ธฐ๋ฅผ ๊ฐ•์ œ ํ˜ผํ•ฉํ•˜๋Š” ๋ฐฉ์‹์œผ๋กœ AGM์˜ ๊ฐœ๋…๋„๋Š” Fig. 3๊ณผ ๊ฐ™๋‹ค.

Fig. 3. Schematic diagram of AGM(Air gas mixer).
../../Resources/sarek/KJACR.2017.29.7.350/fig3.png

์˜ˆํ˜ผํ•ฉ Fan์˜ ํšŒ์ „์ˆ˜ ์ฆ๊ฐ€๋˜๋ฉด ๊ณต๊ธ‰๋˜๋Š” ๊ณต๊ธฐ์œ ๋Ÿ‰๋„ ์ฆ๊ฐ€ํ•˜๊ฒŒ ๋˜๋ฉฐ Fig. 4์™€ ๊ฐ™์€ Air Ratio ๊ฐ€์Šค๋ฐธ๋ธŒ๋ฅผ ์ ์šฉํ•˜๊ฒŒ ๋˜๋ฉด ๋‹น๋Ÿ‰๋น„ ๊ณ ์ •์กฐ๊ฑด์—์„œ ์•ˆ์ •์ ์ธ ์˜ˆํ˜ผํ•ฉ ๊ฐ€์Šค์˜ ํ˜•์„ฑ๊ณผ ์˜ˆํ˜ผํ•ฉ Fan์˜ ํšŒ์ „์ˆ˜ ๋ณ€ํ™”์— ๋”ฐ๋ผ ์—ด์šฉ๋Ÿ‰์„ ๋ณ€ํ™”ํ•  ์ˆ˜ ์žˆ๋Š” ์žฅ์ ์„ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค.

Fig. 4. Photograph of air ratio gas valve.
../../Resources/sarek/KJACR.2017.29.7.350/fig4.png

2.2 ๋ถ„ํฌํŒ์˜ ์ข…๋ฅ˜

Fig. 5์— ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์—ผ๊ณต๊ณผ ๋ถ„ํฌํŒ์˜ ๊ฐœ๋…๋„๋ฅผ ๋„์‹œํ•˜์˜€๋‹ค. ์˜ˆํ˜ผํ•ฉ Fan์—์„œ ๊ฐ•์ œ ์˜ˆํ˜ผํ•ฉ๋œ ์˜ˆํ˜ผํ•ฉ ๊ฐ€์Šค๋Š” Manifold๋ฅผ ํ†ต๊ณผํ•˜์—ฌ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ๋ถ„ํฌํŒ์— ๊ณต๊ธ‰๋œ๋‹ค. ๋ถ„ํฌํŒ์— ๊ณต๊ธ‰๋˜๋Š” ์˜ˆํ˜ผํ•ฉ ๊ฐ€์Šค๋Š” ๋ถ„ํฌํŒ์„ ์ง€๋‚˜๋ฉด์„œ ์ผ์ •ํ•œ ์••๋ ฅ๋ถ„ํฌ๋ฅผ ํ˜•์„ฑํ•˜๊ฒŒ ๋˜๋ฉฐ ์ตœ์ข…์ ์œผ๋กœ ์—ผ๊ณต์— ๊ณต๊ธ‰๋˜์–ด ์—ฐ์†Œ๋˜๊ฒŒ ๋œ๋‹ค.

Fig. 5. Schematic diagram of premixed cylindrical burner assembly.
../../Resources/sarek/KJACR.2017.29.7.350/fig5.png

์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์— ์ ์šฉ๋˜๋Š” ๋ถ„ํฌํŒ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ์—ฐ์†ŒํŠน์„ฑ์„ ๋น„๊ตํ•˜๊ธฐ ์œ„ํ•˜์—ฌ Fig. 6๊ณผ ๊ฐ™์€ ๋ถ„ํฌํŒ์„ ์„ค๊ณ„ ๋ฐ ์ œ์ž‘ํ•˜์˜€๋‹ค. Fig. 6(a)์˜ Reference ๋ถ„ํฌํŒ์„ ์‚ดํŽด๋ณด๋ฉด ๊ธธ์ด 120 mm, ์™ธ๊ฒฝ 60 mm์˜ ์›ํ†ตํ˜• ํ˜•์ƒ์œผ๋กœ ๊ตฌ์„ฑ๋˜์–ด ์žˆ๊ณ  ๊ธธ์ด๋ฐฉํ–ฅ์œผ๋กœ ์ง๊ฒฝ 2.4, 3.0 mm์˜ ์ž‘์€ ์›ํ˜•์˜ ๊ตฌ๋ฉ์ด ํ˜•์„ฑ๋˜์–ด ์žˆ๋‹ค. Fig. 6(b)์˜ ์ฒญ๋™์†Œ๊ฒฐ ๋ถ„ํฌํŒ์˜ ๊ฒฝ์šฐ ๋ถ„ํฌํŒ ์ „๋ถ€๋ถ„์— ๊ฑธ์ณ 100 ์˜ Permeability๊ฐ€ ํ˜•์„ฑ๋˜์–ด ์žˆ๋Š” ๊ตฌ์กฐ์ด๊ณ  Fig. 6(c)๋Š” 1mm์˜ ์ง๊ฒฝ์œผ๋กœ ํƒ€๊ณต๋œ ํƒ€๊ณตํŒ์„ ๊ฐ€๊ณตํ•˜์—ฌ ์ œ์ž‘ํ•˜์˜€๊ณ  ๊ธธ์ด ๋ฐ ์ง๊ฒฝ์€ Reference ๋ถ„ํฌํŒ๊ณผ ๋™์ผํ•˜๋‹ค.

Fig. 6. Comparison of baffle plate.
../../Resources/sarek/KJACR.2017.29.7.350/fig6.png

2.3 ์—ผ๊ณต์˜ ์ข…๋ฅ˜

์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์—ผ๊ณตํ˜•์ƒ์€ ์˜ˆํ˜ผํ•ฉ ์—ฐ์†Œ์˜ ์—ฐ์†Œ์•ˆ์ •์„ฑ ๋ฐ ๋ฐฐ๊ธฐ๊ฐ€์Šค ๋ฐฐ์ถœ์— ์žˆ์–ด ์ปค๋‹ค๋ž€ ์˜ํ–ฅ์„ ๋ฏธ์น˜๋Š” ์ค‘์š”ํ•œ ์š”์†Œ์ด๋‹ค.

๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ๊ตญ๋‚ด ๋ณด์ผ๋Ÿฌ ์—…์ฒด์—์„œ ์‚ฌ์šฉํ•˜๊ณ  ์žˆ๋Š” Fig. 7(a) ์—ผ๊ณต์„ Reference๋กœ ์„ค์ •ํ•˜์˜€๊ณ  Reference ์—ผ๊ณต์˜ ์ง๊ฒฝ๊ณผ ๊ธธ์ด๋ฅผ ๊ธฐ์ค€์œผ๋กœ Fig. 7(b), (c), (d)์™€ ๊ฐ™์€ ์—ผ๊ณต์„ ์ œ์ž‘ํ•˜์—ฌ ์‹คํ—˜์— ์ ์šฉํ•˜์˜€๋‹ค. ๊ฐ๊ฐ์˜ ์—ผ๊ณต์„ ์‚ดํŽด๋ณด๋ฉด Fig. 7(a) ์—ผ๊ณต์€ 7๊ฐœ์˜ ๊ตฌ๋ฉ์œผ๋กœ ํ•˜๋‚˜์˜ ์—ฐ์†Œํ™”์—ผ์„ ํ˜•์„ฑํ•˜๊ณ  2๊ฐœ์˜ ์Šฌ๋ฆฟ์„ ํ†ตํ•˜์—ฌ ๋˜ ๋‹ค๋ฅธ ํ•˜๋‚˜์˜ ํ™”์—ผ์„ ํ˜•์„ฑํ•˜๋„๋ก ๊ตฌ์„ฑ๋˜์–ด ์žˆ๋‹ค. Fig. 7(b) ์—ผ๊ณต์€ ๋…๋ฆฝ๋œ ํ•˜๋‚˜์˜ ๊ตฌ๋ฉ์— ์Šคํ…Œ์ธ๋ฆฌ์Šค Mesh๋ฅผ ๊ฒน์น˜๋„๋ก ๊ตฌ์„ฑํ•˜์—ฌ ๋ถ€๋ถ„์ ์œผ๋กœ ์—ผ๊ณต ํฌ๊ธฐ๋ฅผ ์กฐ์ ˆํ•˜์—ฌ ๊ตฌ์„ฑํ•˜์˜€๋‹ค. Fig. 7(c) ์—ผ๊ณต์€ 1 mm์˜ ์ž‘์€ ๊ตฌ๋ฉ์ด ํŒจํ„ด ์—†์ด ์—ผ๊ณต ์ „ ์˜์—ญ์—์„œ ๋šซ๋ ค์žˆ๋Š” ๊ตฌ์กฐ์ด๋‹ค. Fig. 7(d)๋Š” Fig. 7(a) ์—ผ๊ณต๊ณผ ๋™์ผํ•˜๊ฒŒ 7๊ฐœ์˜ ๊ตฌ๋ฉ์œผ๋กœ ํ•˜๋‚˜์˜ ์—ฐ์†Œํ™”์—ผ์„ ํ˜•์„ฑํ•˜๋Š” ํ˜•์ƒ์ด์ง€๋งŒ 7๊ฐœ์˜ ๊ตฌ๋ฉ ์˜†์— ํ˜•์„ฑ๋œ ์Šฌ๋ฆฟ์ด ์ œ๊ฑฐ๋œ ํ˜•์ƒ์œผ๋กœ ๊ตฌ์„ฑํ•˜์—ฌ ์ ์šฉํ•˜์˜€๋‹ค.

Fig. 7. Comparison of flame holes.
../../Resources/sarek/KJACR.2017.29.7.350/fig7.png

2.4 ํ™”์—ผ์ง€์ง€๋Œ€

์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ๊ฒฝ์šฐ ์—ผ๊ณต์˜ ์ž…๊ตฌ๋ถ€๋ถ„๊ณผ ๋๋‹จ๋ถ€๋ถ„์—์„œ ์—ผ๊ณต์„ ํ†ต๊ณผํ•˜๋Š” ๊ณต๊ธฐ/์—ฐ๋ฃŒ ํ˜ผํ•ฉ๊ฐ€์Šค์˜ ์œ ์†์ฐจ์ด๊ฐ€ ๋ฐœ์ƒํ•˜์—ฌ ํ™”์—ผ๋‚ ๋ฆผ ํ˜„์ƒ์ด ๋ฐœ์ƒ๋˜์–ด ์ง„๋‹ค. ํ™”์—ผ๋‚ ๋ฆผ ํ˜„์ƒ์„ ๋ฐฉ์ง€ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ Fig. 8๊ณผ ๊ฐ™์€ ํ™”์—ผ์ง€์ง€๋Œ€๋ฅผ ์„ค์น˜ํ•˜์—ฌ ์‹คํ—˜์„ ์ง„ํ–‰ํ•˜์˜€๋‹ค. ํ™”์—ผ์ง€์ง€๋Œ€๋Š” ์Šคํ…Œ์ธ๋ฆฌ์Šค๋กœ ์ œ์ž‘ํ•˜์˜€์œผ๋ฉฐ ํ™”์—ผ์ง€์ง€๋Œ€์˜ ๋‚ด๊ฒฝ์„ ์›ํ†ตํ˜• ์—ผ๊ณต์˜ ์™ธ๊ฒฝ๊ณผ ๋™์ผํ•˜๊ฒŒ ์ œ์ž‘ํ•˜์—ฌ ์ (Spot) ์šฉ์ ‘์„ ํ†ตํ•˜์—ฌ ์—ผ๊ณต์— ๊ณ ์ •ํ•˜์˜€๋‹ค.

Fig. 8. Photograph of with and without flame holder.
../../Resources/sarek/KJACR.2017.29.7.350/fig8.png

2.5 ์‹คํ—˜์žฅ์น˜์˜ ๊ตฌ์„ฑ

์—ฐ์†Œ์‹คํ—˜์— ์‚ฌ์šฉ๋œ ์—ฐ๋ฃŒ๋Š” ๋„์‹œ๊ฐ€์Šค๋กœ ๊ทธ ๋Œ€ํ‘œ์ ์ธ ์„ฑ๋ถ„์€ ๋ฉ”ํƒ„(CH4)์ด๋ฉฐ ์ž์„ธํ•œ ๋„์‹œ๊ฐ€์Šค์˜ ์„ฑ๋ถ„๋น„ ๋ฐ ๋ฌผ์„ฑ์น˜๋Š” Table 1๊ณผ ๊ฐ™๋‹ค.(13)

Table 1. Properties of natural gas

Composition

CH4

89.3%

C3H6

1.5%

C2H6

8.6%

C4H10

0.6%

HHV

10,500 kcal/Nm3

Density

0.65 kg/m3

Flammability

0.46 < ฯ† < 1.64

Fig. 9๋Š” ์—ฐ์†Œ์‹คํ—˜์„ ์œ„ํ•œ ์‹คํ—˜์žฅ์น˜์˜ ๊ฐœ๋žต๋„๋ฅผ ๋ณด์—ฌ์ค€๋‹ค. ๊ณต๊ธ‰๋˜๋Š” ๋„์‹œ๊ฐ€์Šค๋Š” ์••๋ ฅ์กฐ์ ˆ๊ธฐ๋ฅผ ํ†ต๊ณผํ•˜๋ฉด์„œ 250 mmAq์˜ ์••๋ ฅ์œผ๋กœ ๊ฐ์••์‹œ์ผœ ์Šต์‹๊ฐ€์Šค ๋ฉ”ํ„ฐ(Wet Gas Meter, Sinagawa)๋กœ ๊ณต๊ธ‰๋˜์–ด์ง„๋‹ค. ์Šต์‹๊ฐ€์Šค ๋ฉ”ํ„ฐ์™€ ์˜ˆํ˜ผํ•ฉ Fan ์‚ฌ์ด์—๋Š” SIT์‚ฌ์˜ Air Ratio ๊ฐ€์Šค๋ฐธ๋ธŒ๋ฅผ ์ ์šฉํ•˜์—ฌ ๊ณต๊ธ‰๋˜๋Š” ๋„์‹œ๊ฐ€์Šค์˜ ์œ ๋Ÿ‰ ๋ฐ ๋‹น๋Ÿ‰๋น„๋ฅผ ์ •๋ฐ€ ์กฐ์ •ํ•˜์˜€์œผ๋ฉฐ ๊ฐ€์Šค๋ฐธ๋ธŒ๋ฅผ ํ†ต๊ณผํ•˜๋Š” ๋„์‹œ๊ฐ€์Šค์˜ ์œ ๋Ÿ‰์€ ์Šต์‹๊ฐ€์Šค ๋ฉ”ํ„ฐ๋ฅผ ํ†ตํ•˜์—ฌ ํ™•์ธํ•˜์—ฌ ์—ด์šฉ๋Ÿ‰์„ ํ™•์ธํ•˜์˜€๋‹ค. ๋‹น๋Ÿ‰๋น„์˜ ์กฐ์ •์€ ์˜ˆํ˜ผํ•ฉ Fan์˜ ํšŒ์ „์†๋„์™€ Air Ratio ๊ฐ€์Šค๋ฐธ๋ธŒ์˜ ์œ ๋Ÿ‰์กฐ์ ˆ ๋‚˜์‚ฌ๋ฅผ ๋ณ€๊ฒฝํ•˜์—ฌ ์กฐ์ •ํ•˜์˜€๋‹ค. ๋ฐฐ๊ธฐ๊ฐ€์Šค์˜ ์ธก์ •์€ NOx, CO, CO2, O2์˜ ์ธก์ •์ด ๊ฐ€๋Šฅํ•œ Testo-330๊ณผ Testo Easyheat Software Version 2.0์„ ์‚ฌ์šฉํ•˜์—ฌ ๋ฐฐ๊ธฐ๊ฐ€์Šค Data๋ฅผ ์ˆ˜์ง‘ํ•˜์—ฌ ๋ถ„์„ํ•˜์˜€๋‹ค. ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์—ฐ์†ŒํŠน์„ฑ์„ ํŒŒ์•…ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ (Nikon, D-80)๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๋‹น๋Ÿ‰๋น„ ๋ฐ ์—ด์šฉ๋Ÿ‰ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ํ™”์—ผ์˜ ๊ฑฐ๋™์„ ์ดฌ์˜ํ•˜์—ฌ ๊ด€์ฐฐํ•˜์˜€๋‹ค.

Fig. 9. Schematics of combustion experimental apparatus.
../../Resources/sarek/KJACR.2017.29.7.350/fig9.png

3. ์‹คํ—˜๊ฒฐ๊ณผ ๋ฐ ๊ณ ์ฐฐ

3.1 Reference ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์—ฐ์†Œ ํŠน์„ฑ

Reference ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์—ฐ์†ŒํŠน์„ฑ์„ ๋ถ„์„ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ Fig. 6(a)์™€ Fig. 7(a)์˜ ์—ผ๊ณต ๋ฐ ๋ถ„ํฌํŒ์„ ํ™œ์šฉํ•˜์—ฌ ์—ด์šฉ๋Ÿ‰ 20,000 Kcal/h ์กฐ๊ฑด์—์„œ ๋‹น๋Ÿ‰๋น„ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ์˜ˆํ˜ผํ•ฉ ํ™”์—ผ์˜ ๋ณ€ํ™”๋ฅผ ๊ด€์ฐฐํ•˜์˜€๊ณ  Fig. 10์— ๋น„๊ตํ•˜์˜€๋‹ค.

Fig. 10์„ ์‚ดํŽด๋ณด๋ฉด ๋‹น๋Ÿ‰๋น„๊ฐ€ ์ฆ๊ฐ€ํ•จ์— ๋”ฐ๋ผ ์—ฐ์†Œํ™”์—ผ์˜ ํ˜•ํƒœ๊ฐ€ ํ™”์—ผ๋‚ ๋ฆผ โ†’ ์ฒญ์ƒ‰ํ™”์—ผ โ†’ ์ ์ƒ‰ํ™”์—ผ โ†’ ๋…น์ƒ‰ํ™”์—ผ์œผ๋กœ ๋ณ€ํ™”๋˜์–ด ์˜ˆํ˜ผํ•ฉ ์—ฐ์†ŒํŠน์„ฑ ๋‚˜ํƒ€๋‚˜๊ณ  ์žˆ์Œ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. ํ•˜์ง€๋งŒ Fig. 10(b)์˜ ์ฒญ์ƒ‰ํ™”์—ผ์„ ์‚ดํŽด๋ณด๋ฉด ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์–‘ ๋๋‹จ์— ๋ถ€๋ถ„์ ์ธ ํ™”์—ผ๋‚ ๋ฆผ์ด ๋ฐœ์ƒํ•˜๊ณ  ์›ํ†ตํ˜• ๋ฒ„๋„ˆ์˜ ์ค‘์•™์—์„œ๋„ ์—ฐ์†Œํ™”์—ผ์ด ๋ถ€๋ถ„์ ์œผ๋กœ ํ”๋“ค๋ฆฌ๋Š” ํ˜„์ƒ์ด ๋ฐœ์ƒ๋˜์–ด ์•ˆ์ •์ ์ธ ์˜ˆํ˜ผํ•ฉ ํ™”์—ผ์˜ ์ƒ์„ฑ์— ์–ด๋ ค์›€์„ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค.

Fig. 10. Flame characteristic of reference cylindrical premixed burner assembly at heating load 20,000 kcal/h.
../../Resources/sarek/KJACR.2017.29.7.350/fig10.png

3.2 ๋ถ„ํฌํŒ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ์˜ˆํ˜ผํ•ฉ ํ™”์—ผ์˜ ํŠน์„ฑ

Reference ์—ผ๊ณต์— ๋ถ„ํฌํŒ์˜ ํ˜•์ƒ ๋ฐ ์žฌ์งˆ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ์˜ˆํ˜ผํ•ฉ ์—ฐ์†Œ ํŠน์„ฑ์„ ๋ถ„์„ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์—ฐ์†Œ์‹คํ—˜์„ ์ง„ํ–‰ํ•˜์˜€๋‹ค. ์—ฐ์†Œ ์‹คํ—˜์€ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์—ด์šฉ๋Ÿ‰์„ 35,200 kcal/h๋กœ ๊ณ ์ •ํ•˜์˜€๊ณ  ์—ฐ์†Œํ™”์—ผ์˜ ์•ˆ์ •์„ฑ์ด ๊ฐ€์žฅ ๋›ฐ์–ด๋‚œ ์˜์—ญ์—์„œ ์—ฐ์†Œํ™”์—ผ์˜ ๊ฑฐ๋™์„ ๊ด€์ฐฐํ•˜์—ฌ Fig. 11์— ๋น„๊ตํ•˜์˜€๋‹ค.

Reference ๋ถ„ํฌํŒ์„ ์ ์šฉํ•œ Fig. 11(a)์„ ์‚ดํŽด๋ณด๋ฉด ์—ผ๊ณต์˜ ๋๋‹จ์—์„œ์˜ ํ™”์—ผ๋‚ ๋ฆผ๊ณผ ๋ฒ„๋„ˆ ์ค‘๊ฐ„๋ถ€๋ถ„์—์„œ์˜ ํ™”์—ผ ๋–จ๋ฆผ ํ˜„์ƒ์ด ์—ด์šฉ๋Ÿ‰ 20,000 kcal/h์—์„œ์™€ ๊ฐ™์ด ๋™์ผํ•˜๊ฒŒ ๋ฐœ์ƒํ•˜์˜€๊ณ  ํ™”์—ผ๋‚ ๋ฆผ์ด ๋ฐœ์ƒํ•˜๋Š” ํฌ๊ธฐ๊ฐ€ ์ฆ๊ฐ€ํ•˜์˜€๋‹ค. ํ•˜์ง€๋งŒ ์ฒญ๋™์†Œ๊ฒฐ, ํƒ€๊ณตํŒ์„ ๋ถ„ํฌํŒ๋กœ ์‚ฌ์šฉํ•œ Fig. 11(b), Fig. 11(c)์˜ ์—ฐ์†Œํ™”์—ผ์„ ์‚ดํŽด๋ณด๋ฉด ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์ค‘๊ฐ„๋ถ€๋ถ„์— ํ™”์—ผ์ด ์‹ฌํ•˜๊ฒŒ ๋–จ๋ฆฌ๋Š” ๋ฌธ์ œ์ ์ด ๊ฐ์†Œํ•˜์˜€๊ณ  ํ™”์—ผ๋‚ ๋ฆผ ํ˜„์ƒ๋„ ๊ฐ์†Œ๋จ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. ๋ถ„ํฌํŒ์˜ ํ˜•์ƒ ๋ฐ ์žฌ์งˆ ๋ณ€ํ™”์— ๋”ฐ๋ผ ์—ฐ์†Œํ™”์—ผ์„ ๋ถ„์„ํ•œ ๊ฒฐ๊ณผ Reference ๋ถ„ํฌํŒ, ํƒ€๊ณต ๋ถ„ํฌํŒ, ์ฒญ๋™์†Œ๊ฒฐ ๋ถ„ํฌํŒ ์ˆœ์œผ๋กœ ์—ฐ์†Œํ™”์—ผ์˜ ์•ˆ์ •์„ฑ์ด ์ฆ๊ฐ€๋˜๋Š” ๊ฒฝํ–ฅ์„ ํ™•์ธํ•˜์˜€๋‹ค.

Fig. 11. Flame characteristic of reference flame holes and different baffle plate at heating load 35,200 kcal/h.
../../Resources/sarek/KJACR.2017.29.7.350/fig11.png

3.3 ์—ผ๊ณต ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ์˜ˆํ˜ผํ•ฉ ํ™”์—ผ์˜ ํŠน์„ฑ

Reference ์—ผ๊ณต๊ณผ ๋‹ค์–‘ํ•œ ์ข…๋ฅ˜์˜ ๋ถ„ํฌํŒ ์กฐํ•ฉ์„ ํ†ตํ•˜์—ฌ ์‹คํ—˜์„ ์ง„ํ–‰ํ•˜์˜€๊ณ  ํƒ€๊ณต ๋ถ„ํฌํŒ๊ณผ ์ฒญ๋™์†Œ๊ฒฐ ๋ถ„ํฌํŒ ์—์„œ ์—ฐ์†Œํ™”์—ผ์˜ ์•ˆ์ •์„ฑ์ด ์ฆ๊ฐ€๋จ์„ ํ™•์ธํ•˜์˜€๋‹ค. ์ฒญ๋™์†Œ๊ฒฐ ๋ฐ ํƒ€๊ณต ๋ถ„ํฌํŒ๊ณผ Fig. 7์˜ ์—ผ๊ณต์„ ์กฐํ•ฉํ•˜์—ฌ ์˜ˆํ˜ผํ•ฉ ์›ํ†ตํ˜• ๋ฒ„๋„ˆ๋ฅผ ๊ตฌ์„ฑํ•˜์˜€๊ณ  ์—ด์šฉ๋Ÿ‰ 35,200 kcal/h ์กฐ๊ฑด์—์„œ ์‹คํ—˜์„ ์ง„ํ–‰ํ•˜์˜€๊ณ  ์—ฐ์†Œํ™”์—ผ์˜ ์•ˆ์ •์„ฑ์ด ๋›ฐ์–ด๋‚œ ์˜์—ญ์—์„œ ์—ฐ์†Œํ™”์—ผ์„ ๊ฐ€์‹œํ™”ํ•˜์—ฌ Fig. 12์— ๋น„๊ตํ•˜์˜€๋‹ค.

์ฒญ๋™์†Œ๊ฒฐ ๋ฐ ํƒ€๊ณต ๋ถ„ํฌํŒ๊ณผ ๊ฐ๊ฐ์˜ ์—ผ๊ณต์˜ ์กฐํ•ฉ์„ ํ†ตํ•˜์—ฌ ๋น„๊ต๋œ ์—ฐ์†Œํ™”์—ผ์„ ์‚ดํŽด๋ณด๋ฉด ์ฒญ๋™์†Œ๊ฒฐ ๋ฐ ํƒ€๊ณต ๋ถ„ํฌํŒ์„ ์‚ฌ์šฉํ•œ ์—ฐ์†Œํ™”์—ผ์˜ ํ˜•ํƒœ๋Š” ํฌ๊ฒŒ ๋ฐœ์ƒ๋˜์ง€ ์•Š์Œ์„ ํ™•์ธ ํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. ๊ฐ๊ฐ์˜ ์—ฐ์†Œํ™”์—ผ์„ ์‚ดํŽด๋ณด๋ฉด Fig. 12(a), (d)์˜ ์—ฐ์†Œํ™”์—ผ์˜ ๊ฒฝ์šฐ ์—ผ๊ณต์— ํ˜•์„ฑ๋œ 7๊ฐœ์˜ ์ž‘์€ ๊ตฌ๋ฉ์—์„œ ํ•˜๋‚˜์˜ ์—ฐ์†Œํ™”์—ผ์ด ํ˜•์„ฑ๋จ์„ ํ™•์ธ ํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. ํ•˜์ง€๋งŒ Fig. 12(a)์˜ ํ˜•์„ฑ๋œ Slit์˜ ๊ฒฝ์šฐ์—๋Š” 2๊ฐœ์˜ Slit์—์„œ ๊ฐ๊ฐ ๋…๋ฆฝ๋œ ์˜ˆํ˜ผํ•ฉ ํ™”์—ผ์ด ํ˜•์„ฑ๋˜๊ณ  ์ด ๋‘ ๊ฐœ์˜ ํ™”์—ผ์ด ๋‹ค์‹œ ํ•˜๋‚˜์˜ ํ™”์—ผ์œผ๋กœ ํ•ฉ์ณ์ง€๋Š” ํ˜„์ƒ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. Fig. 12(b)์˜ ์—ฐ์†Œํ™”์—ผ์€ ์—ฐ์†Œํ™”์—ผ์„ ๋…๋ฆฝ์ ์œผ๋กœ ํ˜•์„ฑํ•  ์ˆ˜ ์žˆ๋„๋ก ์—ผ๊ณต์„ ์„ค๊ณ„ํ•˜์—ฌ ํ•˜๋‚˜์˜ ์—ผ๊ณต๊ตฌ๋ฉ์— ์—ฐ์†Œํ™”์—ผ์ด ํ•˜๋‚˜์”ฉ ๋…๋ฆฝ์ ์œผ๋กœ ํ˜•์„ฑ๋˜์—ˆ๊ณ  ์—ฐ์†Œํ™”์—ผ์˜ ๊ธธ์ด๊ฐ€ ์‹คํ—˜์กฐ๊ฑด ์ค‘ ๊ฐ€์žฅ ๊ธธ๊ฒŒ ํ˜•์„ฑ๋˜์—ˆ๋‹ค. Fig. 12(c)์˜ ์—ฐ์†Œํ™”์—ผ์„ ์‚ดํŽด๋ณด๋ฉด ์—ฐ์†Œํ™”์—ผ์ด ์—ผ๊ณต ๋ฐ”๋กœ์œ—๋ถ€๋ถ„์— Flat ํ•œ 1์ฐจ์›์˜ ์—ฐ์†Œํ™”์—ผ์˜ ํ˜•ํƒœ๋กœ ์ƒ์„ฑ๋˜๋Š” ๊ฒƒ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. ํ•˜์ง€๋งŒ Flatํ•œ 1์ฐจ์›์˜ ์—ฐ์†Œํ™”์—ผ์˜ ๊ฒฝ์šฐ ๋‹น๋Ÿ‰๋น„ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ์—ฐ์†Œํ™”์—ผ์˜ ์•ˆ์ •์„ฑ์ด ๋งค์šฐ ๋ถˆ์•ˆ์ •ํ•จ์„ ํ™•์ธํ•˜์˜€๋‹ค.

Fig. 12. Flame Characteristic of different flame hole at heating load 35,200 kcal/h.
../../Resources/sarek/KJACR.2017.29.7.350/fig12.png

๋ณธ ์‹คํ—˜๊ฒฐ๊ณผ๋ฅผ ๋ฐ”ํƒ•์œผ๋กœ ์ฒญ๋™์†Œ๊ฒฐ ๋ฐ ํƒ€๊ณต ๋ถ„ํฌํŒ์„ ์ ์šฉํ•  ๊ฒฝ์šฐ Reference ๋ฐ ํŒจํ„ด ์—ผ๊ณต์—์„œ ๊ฐ€์žฅ ์•ˆ์ •์ ์ธ ์—ฐ์†Œํ™”์—ผ์„ ํ˜•์„ฑํ•  ์ˆ˜ ์žˆ์Œ์„ ํ™•์ธํ•˜์˜€๋‹ค. ์—ฐ์†Œํ™”์—ผ์„ ํ˜•ํƒœ๋ฅผ ์‚ดํŽด๋ณด๋ฉด ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์ค‘๊ฐ„๋ถ€๋ถ„์— ํ™”์—ผ์ด ์‹ฌํ•˜๊ฒŒ ๋–จ๋ฆฌ๋Š” ๋ฌธ์ œ์ ์ด ๋ชจ๋‘ ๊ฐ์†Œํ•˜์˜€์ง€๋งŒ ๋ฒ„๋„ˆ์˜ ์–‘ ๋๋‹จ์— ๋ถ€๋ถ„์ ์ธ ํ™”์—ผ๋‚ ๋ฆผ ํ˜„์ƒ์€ ๊ณ„์† ๋ฐœ์ƒ๋จ์„ ํ™•์ธํ•˜์˜€๋‹ค.

3.4 ํ™”์—ผ์ง€์ง€๋Œ€๋ฅผ ์ ์šฉํ•œ ์—ฐ์†Œํ™”์—ผ์ด ์•ˆ์ •ํ™”

์ฒญ๋™์†Œ๊ฒฐ ๋ฐ ํƒ€๊ณต ๋ถ„ํฌํŒ์„ ์ ์šฉํ•  ๊ฒฝ์šฐ Reference ๋ฐ ํŒจํ„ด ์—ผ๊ณต์„ ์ ์šฉํ•˜์—ฌ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์ค‘์•™์—์„œ ๋ฐœ์ƒ๋˜๋Š” ์—ฐ์†Œํ™”์—ผ์˜ ๋–จ๋ฆผ ํ˜„์ƒ์„ ๊ฐ์†Œ์‹œ์ผฐ๋‹ค. ํ•˜์ง€๋งŒ ์›ํ†ตํ˜• ๋ฒ„๋„ˆ์˜ ์–‘ ๋๋‹จ์—์„œ ๋ฐœ์ƒ๋˜๋Š” ํ™”์—ผ๋‚ ๋ฆผ ํ˜„์ƒ์„ ๊ฐ์†Œํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ํ™”์—ผ์ง€์ง€๋Œ€๋ฅผ ์ ์šฉํ•˜์—ฌ ์˜ˆํ˜ผํ•ฉ ์—ฐ์†Œํ™”์—ผ์˜ ์•ˆ์ •์„ฑ์„ ํ™•๋ณดํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์‹คํ—˜์„ ์ง„ํ–‰ํ•˜์˜€๋‹ค. ์„ ํ–‰์—ฐ๊ตฌ์—์„œ ์Šคํ…Œ์ธ๋ฆฌ์Šค ์žฌ์งˆ์˜ Mesh๋ฅผ ํ™œ์šฉํ•˜์—ฌ ๋งŒ๋“ค์–ด์ง„ ํ™”์—ผ์ง€์ง€๋Œ€๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์—ผ๊ณต ์–‘ ๋๋‹จ์—์„œ ๋ฐœ์ƒํ•˜๋Š” ํ™”์—ผ๋‚ ๋ฆผ ํ˜„์ƒ์ด ๊ฐ์†Œํ•จ์„ ํ™•์ธ ํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค.(9)

ํ•˜์ง€๋งŒ ์Šคํ…Œ์ธ๋ฆฌ์Šค ์žฌ์งˆ์˜ Mesh์˜ ๊ฒฝ์šฐ ์žฅ๊ธฐ๊ฐ„ ์‚ฌ์šฉ๋˜๋Š” ๋ณด์ผ๋Ÿฌ์˜ ํŠน์„ฑ์ƒ ๋‚ด๊ตฌ์„ฑ ๋ฌธ์ œ๊ฐ€ ๋ฐœ์ƒ๋  ์ˆ˜ ์žˆ๋‹ค๊ณ  ํŒ๋‹จ๋˜์—ˆ๋‹ค. ๋”ฐ๋ผ์„œ ๋‚ด๊ตฌ์„ฑ ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•˜์—ฌ Fig. 8์— ์ ์šฉ๋œ ํ˜•์ƒ์œผ๋กœ ํ™”์—ผ์ง€์ง€๋Œ€๋ฅผ ๋ณ€๊ฒฝํ•˜์—ฌ ์‹คํ—˜์„ ์ง„ํ–‰ํ•˜์˜€๊ณ  ์‹คํ—˜๊ฒฐ๊ณผ๋ฅผ Fig. 13์— ๋น„๊ตํ•˜์˜€๋‹ค. ์—ฐ์†Œํ™”์—ผ์˜ ์•ˆ์ •์„ฑ์„ ์ฆ๊ฐ€์‹œํ‚ค๊ธฐ ์œ„ํ•˜์—ฌ ์ฒญ๋™์†Œ๊ฒฐ ๋ถ„ํฌํŒ์„ ์ ์šฉํ•˜์˜€๊ณ  ๋™์ผ ์—ผ๊ณต์—์„œ ํ™”์—ผ์ง€์ง€๋Œ€์˜ ์œ ๋ฌด์— ๋”ฐ๋ฅธ ์—ฐ์†Œํ™”์—ผ์„ ๋น„๊ตํ•œ ๊ฒฐ๊ณผ Fig. 13(b) ๊ฐ™์ด ํ™”์—ผ์ง€์ง€๋Œ€๋ฅผ ํ†ตํ•œ ์—ฐ์†Œํ™”์—ผ์˜ ์•ˆ์ •์„ฑ ํ™•๋ณด๊ฐ€ ๊ฐ€๋Šฅํ•จ์„ ํ™•์ธํ•˜์˜€๋‹ค. ํ™”์—ผ์ง€์ง€๋Œ€์˜ ์ ์šฉ์„ ํ†ตํ•˜์—ฌ ์—ฐ์†Œํ™”์—ผ์˜ ํ™”์—ผ๋‚ ๋ฆผ ํ˜„์ƒ์ด ๊ฐ์†Œ๋˜๋Š” ์›์ธ์€ ํ™”์—ผ์ง€์ง€๋Œ€๊ฐ€ ์—ฐ์†Œํ™”์—ผ์˜ ๋†’์€ ํ™”์—ผ์˜จ๋„๋ฅผ ํก์ˆ˜ํ•˜์—ฌ ์ ์—ด๋˜๊ณ  ์—ด์ „๋‹ฌ์„ ํ†ตํ•˜์—ฌ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์–‘ ๋๋‹จ์—์„œ ๊ณต๊ธ‰๋˜๋Š” ์˜ˆํ˜ผํ•ฉ๊ฐ€์Šค๋ฅผ ์˜ˆ์—ดํ•˜์—ฌ ์—ฐ์†Œ์†๋„๊ฐ€ ์ฆ๊ฐ€๋˜์–ด ๋ฐœ์ƒ๋˜๋Š” ํ˜•์ƒ์ด๋ผ ํŒ๋‹จ๋œ๋‹ค.

Fig. 13. Flame phenomena by flame holder at sintered bronze baffle plate and heating load 20,000 kcal/h.
../../Resources/sarek/KJACR.2017.29.7.350/fig13.png

3.5 ๋ฐฐ๊ธฐ๊ฐ€์Šค ์ธก์ • ๋ฐ ๋ถ„์„

๋ณด์ผ๋Ÿฌ์˜ ๊ฒฝ์šฐ ์—ฐ์†Œ์‹ค ์™ธ๋ถ€์˜ ๊ณต๊ธฐ๋ฅผ ์˜ˆํ˜ผํ•ฉ Fan์„ ํ†ตํ•˜์—ฌ ๊ณต๊ธ‰ํ•˜์—ฌ ์—ฐ์†Œ ์‹œ์Šคํ…œ์„ ์šด์˜๋œ๋‹ค. ๋”ฐ๋ผ์„œ ์ฒญ๋™์†Œ๊ฒฐ ๋ถ„ํฌํŒ์˜ ๊ฒฝ์šฐ ๊ณต๊ธ‰๋˜๋Š” ๊ณต๊ธฐ์— ์ด๋ฌผ์งˆ์ด ํ˜ผํ•ฉ๋˜์–ด ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ๋กœ ๊ณต๊ธ‰๋  ๊ฒฝ์šฐ ๋ถ„ํฌํŒ ์ž์ฒด๊ฐ€ ํ•„ํ„ฐ์˜ ์—ญํ• ์„ ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์žˆ๋Š” ๊ฐ€๋Šฅ์„ฑ์ด ์žˆ๋‹ค๊ณ  ํŒ๋‹จ๋œ๋‹ค. ๋”ฐ๋ผ์„œ ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ์—ฐ์†Œํ™”์—ผ์˜ ํ˜•ํƒœ ๋ฐ ์•ˆ์ •์„ฑ์ด ๊ฐ€์žฅ ์šฐ์ˆ˜ํ•œ ์ฒญ๋™์†Œ๊ฒฐ ๋ถ„ํฌํŒ๊ณผ ํƒ€๊ณต ๋ถ„ํฌํŒ๋ฅผ Fig. 8(b)์˜ ์—ผ๊ณต์— ์ ์šฉํ•˜์—ฌ ๋‹น๋Ÿ‰๋น„ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ๋ฐฐ๊ธฐ๊ฐ€์Šค ์ธก์ • ๋ฐ ๋ถ„์„ํ•˜์˜€๋‹ค.

Fig. 14๋ฅผ ์‚ดํŽด๋ณด๋ฉด ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ๋ถ„ํฌํŒ์œผ๋กœ ์ฒญ๋™์†Œ๊ฒฐ ๋ฐ ํƒ€๊ณต ๋ถ„ํฌํŒ์„ ์ ์šฉํ•˜์—ฌ๋„ ๋‹น๋Ÿ‰๋น„ 0.7241~ 0.7924 ์˜์—ญ์—์„œ๋Š” NOx์˜ ๋ฐฐ์ถœ๋Ÿ‰์ด ์•ฝ 12.6 ppm ์ดํ•˜๋กœ ๋ฐฐ์ถœ๋จ์„ ํ™•์ธํ•˜์˜€๋‹ค. ๋˜ํ•œ ๋ถ„ํฌํŒ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ CO์˜ ๋ฐฐ์ถœ๋Ÿ‰์„ ๋น„๊ตํ•˜๋ฉด ๋‹น๋Ÿ‰๋น„ 0.75 ์ด์ƒ ๋ถ€๋ถ„์—์„œ๋Š” ์ฒญ๋™์†Œ๊ฒฐ ๋ฐ ํƒ€๊ณต ๋ถ„ํฌํŒ์„ ์ ์šฉํ•œ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ๋ฐฐ์ถœ ํŠน์„ฑ์ด ๋น„์Šทํ•˜๊ฒŒ ๋‚˜ํƒ€๋‚ฌ๋‹ค. ํ•˜์ง€๋งŒ ๋‹น๋Ÿ‰๋น„๊ฐ€ 0.75๋ณด๋‹ค ์ž‘๊ฒŒ ๋˜๋ฉด ์ฒญ๋™์†Œ๊ฒฐ ๋ถ„ํฌํŒ์˜ CO ๋ฐฐ์ถœ์€ ์ง€์†์ ์œผ๋กœ ๊ฐ์†Œํ•˜์—ฌ ๋‹น๋Ÿ‰๋น„ 0.7241๊นŒ์ง€ ์•ฝ 29 ppm์˜ CO๊ฐ€ ๋ฐฐ์ถœ๋จ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. ์ด์— ๋น„ํ•˜์—ฌ ํƒ€๊ณต ๋ถ„ํฌํŒ์˜ ๊ฒฝ์šฐ ๋‹น๋Ÿ‰๋น„๊ฐ€ 0.7368๊นŒ์ง€๋Š” CO ๋ฐฐ์ถœ๋Ÿ‰์ด ์ ์ฐจ์ ์œผ๋กœ ๊ฐ์†Œํ•˜์—ฌ ์•ฝ 33 ppm ๋ฐฐ์ถœ๋˜์ง€๋งŒ ๋‹น๋Ÿ‰๋น„๊ฐ€ 0.7241 ๋ณ€ํ™”๋˜๋ฉด CO๊ฐ€ ๋ฐฐ์ถœ๋Ÿ‰์ด ์•ฝ 41 ppm์œผ๋กœ ์ฆ๊ฐ€๋จ์„ ํ™•์ธํ•˜์˜€๋‹ค. ๋‘ ๊ฐ€์ง€ ๋ถ„ํฌํŒ์„ ์ ์šฉํ•œ ์‹คํ—˜์„ ํ†ตํ•˜์—ฌ ์ฒญ๋™์†Œ๊ฒฐ ๋ถ„ํฌํŒ์˜ ์„ฑ๋Šฅ์ด ํƒ€๊ณต ๋ถ„ํฌํŒ์— ๋น„ํ•˜์—ฌ ๋ฐฐ๊ธฐ๊ฐ€์Šค ์ธก๋ฉด์—์„œ ํšจ๊ณผ์ ์ด๋ผ ํŒ๋‹จ๋œ๋‹ค. ํ•˜์ง€๋งŒ ๋ถ„ํฌํŒ์˜ ํ•„ํ„ฐํšจ๊ณผ์™€ ์ƒ์šฉํ™”๋ฅผ ์œ„ํ•œ ๊ฐ€๊ฒฉ ๊ฒฝ์Ÿ๋ ฅ์„ ํ™•๋ณด๋ฅผ ์œ„ํ•ด์„œ๋Š” ํƒ€๊ณต ๋ถ„ํฌํŒ์˜ ์ ์šฉ์ด ๋ณด๋‹ค ํšจ๊ณผ์ ์ด๋ผ ํŒ๋‹จ๋˜์–ด ์ถ”๊ฐ€์ ์ด ์‹คํ—˜์—์„œ๋Š” ํƒ€๊ณต ๋ถ„ํฌํŒ์„ ์ ์šฉํ•˜์—ฌ ์‹คํ—˜์„ ์ง„ํ–‰ํ•˜์˜€๋‹ค.

Fig. 14. CO and NOx emission at different equivalence ratio and baffle plate(oxygen zero base).
../../Resources/sarek/KJACR.2017.29.7.350/fig14.png

3.6 ์ƒ์šฉํ™”๋ฅผ ์œ„ํ•œ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ํ˜•์ƒ ๋ณ€ํ™”

์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ๋ฅผ ๊ตฌ์„ฑํ•˜๋Š” ๋ถ„ํฌํŒ๊ณผ ์—ผ๊ณต์˜ ์ง๊ฒฝ๊ณผ ๋†’์ด๋ฅผ Fig. 15์™€ ๊ฐ™์ด ๋ณ€๊ฒฝํ•˜์—ฌ ์ƒ์šฉํ™”๋ฅผ ์œ„ํ•œ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์„ค๊ณ„ ๋ฐ ์ œ์ž‘ํ•˜์—ฌ ์‹คํ—˜์„ ์ง„ํ–‰ํ•˜์˜€๋‹ค. ์ƒ์šฉํ™”๋ฅผ ์œ„ํ•œ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ํ˜•์ƒ์ด ๋ณ€๊ฒฝ๋œ ์›์ธ์€ ๋ณธ ์—ฐ๊ตฌ์™€ ๋™์‹œ์— ์ง„ํ–‰๋œ ์›ํ†ตํ˜• ์—ด๊ตํ™˜๊ธฐ์˜ ๊ฐœ๋ฐœ ๊ณผ์ •์—์„œ ์—ดํšจ์œจ ์ฆ๊ฐ€ ๋ฐ ๋ฐฐ๊ธฐ๊ฐ€์Šค ๊ฐ์†Œ๋ฅผ ์œ„ํ•œ ๊ตฌ์กฐ์˜ ์ ์šฉ์œผ๋กœ ์ธํ•˜์—ฌ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ์—ฐ์†Œ๊ธฐ๋ฅผ ์žฅ์ฐฉํ•  ์ˆ˜ ์žˆ๋Š” ๋‚ด๋ถ€ ๊ณต๊ฐ„์ด ์ถ•์†Œ๋˜์–ด ์„ค๊ณ„๊ฐ€ ๋ณ€๊ฒฝ๋˜์—ˆ๋‹ค.

Fig. 15. Comparison of baffle plate and flame holes at prototype and commercialization.
../../Resources/sarek/KJACR.2017.29.7.350/fig15.png

์ƒ์šฉํ™”๋ฅผ ์œ„ํ•˜์—ฌ ์ˆ˜์ •๋œ ํ˜•์ƒ์˜ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ๋ฅผ ํ™œ์šฉํ•˜์—ฌ ์—ด์šฉ๋Ÿ‰ 17,640 kcal/h ์กฐ๊ฑด์—์„œ ๋‹น๋Ÿ‰๋น„ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ์—ฐ์†Œํ™”์—ผ์˜ ๋ณ€ํ™”๋ฅผ ๊ด€์ฐฐํ•˜์—ฌ Fig. 16์— ๋น„๊ตํ•˜์˜€๋‹ค. Fig. 16์˜ ์‹คํ—˜๊ฒฐ๊ณผ๋ฅผ ์‚ดํŽด๋ณด๋ฉด Fig. 10์˜ ๊ฒฐ๊ณผ์™€ ๋™์ผํ•œ ์—ฐ์†Œํ™”์—ผ์˜ ๋ณ€ํ™”๋ฅผ ๊ด€์ฐฐํ•  ์ˆ˜ ์žˆ์–ด ์ˆ˜์ •๋œ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์—์„œ๋„ ์•ˆ์ •์ ์ธ ์˜ˆํ˜ผํ•ฉ ์—ฐ์†ŒํŠน์„ฑ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค.

Fig. 16. Flame Characteristic of cylindrical premixed burner at heating load 17,640 kcal/h.
../../Resources/sarek/KJACR.2017.29.7.350/fig16.png

3.7 ์ƒ์šฉํ™”๋ฅผ ์œ„ํ•œ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ๋ฐฐ๊ธฐ๊ฐ€์Šค ๋ฐ ์—ดํšจ์œจ ์ธก์ •

์ƒ์šฉํ™”๋ฅผ ์œ„ํ•˜์—ฌ ์ˆ˜์ •๋œ ํ˜•์ƒ์˜ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์™€ ์›ํ†ตํ˜• ์—ด๊ตํ™˜๊ธฐ๋ฅผ ์ ์šฉํ•˜์—ฌ ๋‹น๋Ÿ‰๋น„ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ๋ฐฐ๊ธฐ๊ฐ€์Šค ๋ฐฐ์ถœ๋Ÿ‰์„ ์ธก์ •ํ•˜์—ฌ Fig. 17์— ๋น„๊ตํ•˜์˜€๋‹ค.

๋ฐฐ๊ธฐ๊ฐ€์Šค ๋ฐฐ์ถœ ํŠน์„ฑ์„ ๋น„๊ตํ•œ Fig. 17์„ ์‚ดํŽด๋ณด๋ฉด ๋‹น๋Ÿ‰๋น„ 0.745~0.782 ๋ถ€๋ถ„์—์„œ CO์˜ ๋ฐฐ์ถœ๋Ÿ‰์ด 50 ppm ์ดํ•˜๋กœ ๋ฐฐ์ถœ๋จ์„ ํ™•์ธ ํ•  ์ˆ˜ ์žˆ์—ˆ๊ณ  NOx์˜ ๊ฒฝ์šฐ ์‹คํ—˜์„ ์ง„ํ–‰ํ•œ ์ „ ์˜์—ญ์—์„œ 30 ppm ์ดํ•˜๋กœ ๋ฐฐ์ถœ๋˜์—ˆ๋‹ค.

Fig. 17. Measurement of CO emission(oxygen zero base).
../../Resources/sarek/KJACR.2017.29.7.350/fig17.png

KS B 8127์˜ ์‘์ถ• ๊ฐ€์Šค์˜จ์ˆ˜ ๋ณด์ผ๋Ÿฌ ๊ทœ์ •์„ ์ ์šฉํ•˜์—ฌ ๋ฐฐ๊ธฐ๊ฐ€์Šค ๋ฐ ์—ดํšจ์œจ์„ ์ธก์ •ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ G20 ์—ฐ๋ฃŒ (Methane 100%)๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๋ฐฐ๊ธฐ๊ฐ€์Šค ๋ฐ ์—ดํšจ์œจ์„ ์ธก์ •ํ•˜์˜€๊ณ  ์ธก์ •๊ฒฐ๊ณผ๋ฅผ Table 2์— ๋น„๊ตํ•˜์˜€๋‹ค.

Table 2๋ฅผ ์‚ดํŽด๋ณด๋ฉด ๋‹น๋Ÿ‰๋น„๊ฐ€ ๋‚ฎ์•„์ง€๋ฉด ๋ฐฐ๊ธฐ๊ฐ€์Šค๋กœ ๋ฐฐ์ถœ๋˜๋Š” CO์˜ ๋ฐฐ์ถœ์ด ๊ฐ์†Œํ•˜์ง€๋งŒ ๋ณด์ผ๋Ÿฌ์— ํšจ์œจ์ด ํ•จ๊ป˜ ๊ฐ์†Œ๋œ๋‹ค. ์‹คํ—˜์„ ์ง„ํ–‰ํ•œ ๋‹น๋Ÿ‰๋น„ 0.775~0.813 ์˜์—ญ์—์„œ CO 60 ppm, NOx 30 ppm ์ดํ•˜๋กœ ๋ฐฐ์ถœ๋˜๊ณ  ์—ดํšจ์œจ์ด 90% ์ด์ƒ ์œ ์ง€๋จ์„ ํ™•์ธ ํ•  ์ˆ˜ ์žˆ์–ด ์นœํ™˜๊ฒฝ ๊ณ ํšจ์œจ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ๊ฐ€๋Šฅ์„ฑ์„ ํ™•์ธํ•˜์˜€๋‹ค.

Table 2. Emission and thermal efficiency

ฯ†

Load

(kcal/h)

CO

(ppm)

NOx

(ppm)

ฮท (%)

Part

Full

Sedbuk

0.813

35,200

58

26

88.09

96.407

90.15

0.784

35,200

38

17

88.11

96.407

90.16

0.775

35,200

29

14

88.06

96.407

90.13

4. ๊ฒฐ ๋ก 

ํ™”์—ผ์ง€์ง€๋Œ€๊ฐ€ ์„ค์น˜๋œ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์— ์ ์šฉ๋˜๋Š” ๋ถ„ํฌํŒ๊ณผ ์—ผ๊ณต์˜ ํ˜•์ƒ ๋ฐ ์žฌ์งˆ์„ ๋ณ€๊ฒฝํ•˜๋ฉด์„œ ์‹คํ—˜์„ ์‹คํ–‰ํ•˜์—ฌ ๋‹ค์Œ๊ณผ ๊ฐ™์€ ๊ฒฐ๋ก ์„ ๋„์ถœํ•˜์˜€๋‹ค.

(1) ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์—ฐ์†Œ์‹คํ—˜์„ ํ†ตํ•˜์—ฌ ๋‹น๋Ÿ‰๋น„๊ฐ€ ์ฆ๊ฐ€ํ•จ์— ๋”ฐ๋ผ ์—ฐ์†Œํ™”์—ผ์ด ํ™”์—ผ๋‚ ๋ฆผ โ†’ ์ฒญ์ƒ‰ํ™”์—ผโ†’ ์ ์ƒ‰ํ™”์—ผ โ†’ ๋…น์ƒ‰ํ™”์—ผ์œผ๋กœ ์—ฐ์†Œํ™”์—ผ ํ˜•ํƒœ๊ฐ€ ๋ณ€ํ™”๋˜๋Š” ๊ฒƒ์„ ํ™•์ธํ•˜์˜€๋‹ค.

(2) ๋ถ„ํฌํŒ์„ Reference์—์„œ ์ฒญ๋™์†Œ๊ฒฐ, ํƒ€๊ณต ๋ถ„ํฌํŒ์œผ๋กœ ๋ณ€๊ฒฝํ•˜๋ฉฐ ์‹คํ—˜์„ ์ง„ํ–‰ํ•œ ๊ฒฐ๊ณผ Reference ๋ถ„ํฌํŒ์— ๋น„ํ•˜์—ฌ ์ฒญ๋™์†Œ๊ฒฐ ๋ฐ ํƒ€๊ณต ๋ถ„ํฌํŒ์—์„œ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์ค‘๊ฐ„๋ถ€๋ถ„์—์„œ ๋ฐœ์ƒ๋˜๋˜ ์—ฐ์†Œํ™”์—ผ์˜ ๋–จ๋ฆผ ํ˜„์ƒ์ด ๊ฐ์†Œ๋จ์„ ํ™•์ธํ•˜์˜€๋‹ค.

(3) ์ฒญ๋™์†Œ๊ฒฐ, ํƒ€๊ณต ๋ถ„ํฌํŒ๊ณผ ๋‹ค์–‘ํ•œ ์ข…๋ฅ˜์˜ ์—ผ๊ณต์„ ์กฐํ•ฉํ•˜์—ฌ ์—ฐ์†Œ์‹คํ—˜์„ ์ง„ํ–‰ํ•˜์˜€๊ณ  ์‹คํ—˜๊ฒฐ๊ณผ Reference ๋ฐ ํŒจํ„ด ์—ผ๊ณต์—์„œ ์•ˆ์ •์ ์ธ ์—ฐ์†Œํ™”์—ผ์˜ ํ˜•์„ฑ์ด ๊ฐ€๋Šฅํ•จ์„ ํ™•์ธํ•˜์˜€๋‹ค.

(4) ์–‡์€ ํŒ ํ˜•ํƒœ์˜ ํ™”์—ผ์ง€์ง€๋Œ€๋ฅผ ์„ค๊ณ„ํ•˜์˜€๊ณ  ์Šคํ…Œ์ธ๋ฆฌ์Šค๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๊ฐ€๊ณตํ•˜์—ฌ ํ™”์—ผ์ง€์ง€๋Œ€๋ฅผ ์ ์šฉํ•œ ๊ฒฐ๊ณผ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์–‘ ๋๋‹จ์—์„œ ๋ฐœ์ƒํ•˜๋˜ ํ™”์—ผ๋‚ ๋ฆผ ํ˜„์ƒ์ด ๊ฐ์†Œ๋จ์„ ํ™•์ธํ•˜์˜€๋‹ค.

(5) ์ฒญ๋™์†Œ๊ฒฐ ๋ฐ ํƒ€๊ณต ๋ถ„ํฌํŒ๋ฅผ ์ ์šฉํ•˜์—ฌ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ๋ฐฐ๊ธฐ๊ฐ€์Šค๋ฅผ ๋ถ„์„ํ•œ ๊ฒฐ๊ณผ NOx์˜ ๊ฒฝ์šฐ ๋‹น๋Ÿ‰๋น„ 0.7241~0.7924 ์˜์—ญ์—์„œ ์•ฝ 12.6 ppm ์ดํ•˜๋กœ ๋ฐฐ์ถœ๋จ์„ ํ™•์ธํ•˜์˜€์œผ๋ฉฐ CO์˜ ๊ฒฝ์šฐ์—๋„ ๋‹น๋Ÿ‰๋น„ 0.7368~0.7241 ์˜์—ญ์—์„œ 50 ppm ์ดํ•˜์˜ CO๊ฐ€ ๋ฐฐ์ถœ๋˜์–ด ์นœํ™˜๊ฒฝ ์—ฐ์†Œ ์‹œ์Šคํ…œ์œผ๋กœ์˜ ๊ฐ€๋Šฅ์„ฑ์„ ํ™•์ธํ•˜์˜€๋‹ค.

(6) ์ƒ์šฉํ™”๋ฅผ ์œ„ํ•˜์—ฌ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ์ง๊ฒฝ ๋ฐ ๋†’์ด๋ฅผ ๋ณ€๊ฒฝํ•˜์—ฌ KS B 8127์˜ ์‘์ถ•๊ฐ€์Šค ์˜จ์ˆ˜ ๋ณด์ผ๋Ÿฌ ๊ทœ์ •์„ ์ ์šฉํ•˜์—ฌ ์‹คํ—˜์„ ์ง„ํ–‰ํ•˜์˜€๊ณ  ์‹คํ—˜๊ฒฐ๊ณผ ๋‹น๋Ÿ‰๋น„ 0.775~-0.813 ์˜์—ญ์—์„œ CO 58 ppm, NOx 26 ppm ์ดํ•˜๋กœ ๋ฐฐ์ถœ๋˜์—ˆ๊ณ  ์—ดํšจ์œจ์ด 90.13% ์ด์ƒ ์œ ์ง€๋จ์„ ํ™•์ธํ•˜์—ฌ ์นœํ™˜๊ฒฝ ๊ณ ํšจ์œจ ์›ํ†ตํ˜• ์˜ˆํ˜ผํ•ฉ ๋ฒ„๋„ˆ์˜ ๊ฐ€๋Šฅ์„ฑ์„ ํ™•์ธํ•˜์˜€๋‹ค.

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