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

  1. ์ค‘์•™๋Œ€ํ•™๊ต ๋Œ€ํ•™์› ๋ฐ•์‚ฌ๊ณผ์ • (Ph.D Candidate, Graduate School, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, Republic of Korea)
  2. ์ค‘์•™๋Œ€ํ•™๊ต ๋Œ€ํ•™์› ์„์‚ฌ๊ณผ์ • (Master's course, Graduate School, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, Republic of Korea)
  3. ์ค‘์•™๋Œ€ํ•™๊ต ๋Œ€ํ•™์› ์„์‚ฌ๊ณผ์ • (Master's course, Graduate School, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, Republic of Korea)
  4. ์ค‘์•™๋Œ€ํ•™๊ต ๋Œ€ํ•™์› ๋ฐ•์‚ฌ๊ณผ์ • (Ph.D Candidate, Graduate School, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, Republic of Korea)
  5. ์ค‘์•™๋Œ€ํ•™๊ต ๊ฑด์ถ•ํ•™๋ถ€ ๊ต์ˆ˜ (Professor, School of Architecture & Building Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, Republic of Korea)



์ž์—ฐํ™˜๊ธฐ์œจ(Natural ventilation efficiency), ์ง‘ํ’๋ฃจ๋ฒ„(Windcatcher louver), ๊ณต๋™์ฃผํƒ(Apartment houses), ์ „์‚ฐ์œ ์ฒด์—ญํ•™(Computational fluid dynamics)

๊ธฐํ˜ธ์„ค๋ช…

ฯ๏ผš๋ฐ€๋„ [kg/m3]
k๏ผš๋‚œ๋ฅ˜ ์œ ๋™ ์—๋„ˆ์ง€ [m2/s2]
ฮผ๏ผš์ ์„ฑ๊ณ„์ˆ˜ [Paโ€คs]
Gk๏ผšํ‰๊ท ์†๋„์— ์˜ํ•œ ์ƒ์„ฑํ•ญ
Gb๏ผš๋ถ€๋ ฅ์— ์˜ํ•œ ์ƒ์„ฑํ•ญ
ฮตฮต ๏ผš๋‚œ๋ฅ˜ ์šด๋™ ์—๋„ˆ์ง€ ์†Œ์‚ฐ์œจ [m2/s2]

1. ์—ฐ๊ตฌ๋ฐฐ๊ฒฝ ๋ฐ ๋ชฉ์ 

๋ฏธ๊ตญ ๊ตญ๋ฆฝ์ง์—…์•ˆ์ „๊ฑด๊ฐ•์—ฐ๊ตฌ์†Œ(NIOSH; National Institute for Occupational Safety and Health)์—์„œ๋Š” ์‹ค๋‚ด๊ณต๊ธฐ์˜ ์˜ค์—ผ ๊ธฐ์—ฌ๋„๋Š” โ€˜๋ถˆ์ถฉ๋ถ„ํ•œ ํ™˜๊ธฐโ€™๋กœ ์ธํ•œ ์˜ํ–ฅ์ด ๊ฐ€์žฅ ํฌ๋‹ค(52%)๊ณ  ๋ฐœํ‘œํ•˜์˜€๋‹ค.[1] ํ™˜๊ธฐ๊ฐ€ ์›ํ™œํ•˜๊ฒŒ ์ด๋ฃจ์–ด์ง€์ง€ ์•Š์•„ ์‹ค๋‚ด๊ณต๊ธฐ๊ฐ€ ์˜ค์—ผ๋  ๊ฒฝ์šฐ ๊ฐ๊ฐ๋‘”ํ™”, ๋‘ํ†ต, ํ˜ธํก๊ธฐ์งˆํ™˜ ๋“ฑ ์ƒˆ์ง‘์ฆํ›„๊ตฐ(Sick House Syndrome)๊ณผ ๋นŒ๋”ฉ์ฆํ›„๊ตฐ(Sick Building syndrome) ๋“ฑ์˜ ์ธ์ฒด์˜ํ–ฅ์ด ๋ฐœ์ƒ๋  ์ˆ˜ ์žˆ์œผ๋ฉฐ ์‹ฌํ•  ๊ฒฝ์šฐ ์‚ฌ๋ง์— ์ด๋ฅด๊ธฐ๋„ ํ•œ๋‹ค.[3]

์ด์™€ ๊ฐ™์ด ์‹ค๋‚ด๊ณต๊ธฐ์งˆ ์˜ค์—ผ์„ ์™„ํ™”ํ•˜๊ณ  ์ฒญ์ •ํ•œ ํ™˜๊ฒฝ์„ ์กฐ์„ฑํ•  ์ˆ˜ ์žˆ๋Š” ๊ฐ€์žฅ ํšจ๊ณผ์ ์ด๋ฉฐ ์ผ๋ฐ˜์ ์ธ ๋ฐฉ๋ฒ•์€ ํ™˜๊ธฐ์ด๋ฉฐ, ์šฐ๋ฆฌ๋‚˜๋ผ์—์„œ๋Š” ์‹ค๋‚ด๊ณต๊ธฐ์งˆ์„ ์ผ์ •์ˆ˜์ค€ ์ด์ƒ ํ™•๋ณดํ•˜๊ธฐ ์œ„ํ•˜์—ฌ 100์„ธ๋Œ€ ์ด์ƒ์˜ ๊ณต๋™์ฃผํƒ ๋˜๋Š” ์ฃผํƒ ์™ธ์˜ ์‹œ์„ค๊ณผ ๋™์ผ๊ฑด์ถ•๋ฌผ๋กœ ๊ฑด์ถ•ํ•˜๋Š” ๊ฒฝ์šฐ๋กœ์„œ ์ฃผํƒ์ด 100์„ธ๋Œ€ ์ด์ƒ์ธ ๊ฑด์ถ•๋ฌผ์—์„œ๋Š” ์‹œ๊ฐ„๋‹น ํ™˜๊ธฐํšŸ์ˆ˜ 0.5ํšŒ ์ด์ƒ์„ ์š”๊ตฌํ•˜๊ณ  ์žˆ๋‹ค.[5] ์ด์™€ ๊ฐ™์€ ํ™˜๊ธฐํšŸ์ˆ˜ ์„ฑ๋Šฅํ‰๊ฐ€๋ฅผ ์œ„ํ•ด์„œ๋Š” ํ•œ๊ตญ์‚ฐ์—…ํ‘œ์ค€์˜ KS F 2921 ใ€Œ์ž์—ฐํ™˜๊ธฐ์„ค๋น„์˜ ํ™˜๊ธฐ์„ฑ๋Šฅ ์‹œํ—˜๋ฐฉ๋ฒ•ใ€์„ ์ด์šฉํ•œ๋‹ค.[6]

๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ๊ณต๋™์ฃผํƒ์—์„œ ๋ฃจ๋ฒ„(Louver)๋ฅผ ์ฐฝํ˜ธ ๊ฐœ๊ตฌ๋ถ€์— ์ ์šฉํ•˜์—ฌ ์™ธ๊ธฐ์˜ ๋ฐ”๋žŒ ๋ฐ ์‹ค๋‚ดยท์™ธ ์˜จ๋„์ฐจ๊ฐ€ ํฌ์ง€ ์•Š์€ ๊ฒฝ์šฐ์—๋„ ์ƒ๋Œ€์ ์œผ๋กœ ๋ณด๋‹ค ์›ํ™œํ•˜๊ฒŒ ์ž์—ฐํ™˜๊ธฐ๊ฐ€ ์ด๋ฃจ์–ด์งˆ ์ˆ˜ ์žˆ๋Š” ์ง‘ํ’์žฅ์น˜(Windcatcher)๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์ž์—ฐํ™˜๊ธฐ์˜ ํšจ์œจ์„ ์ƒ์Šน์‹œํ‚ค๊ณ ์ž ํ•˜์˜€๋‹ค. ์ „์‚ฐ์œ ์ฒด์—ญํ•™(CFD; Computational Fluid Dynamics)์„ ์ด์šฉํ•˜์—ฌ ๊ณต๋™์ฃผํƒ์— ์ง‘ํ’์žฅ์น˜(Windcatcher) ์œ ยท๋ฌด์— ๋”ฐ๋ฅธ ์ž์—ฐํ™˜๊ธฐํšจ์œจ์„ ๋ถ„์„ํ•˜์˜€๋‹ค. ์ง‘ํ’์žฅ์น˜(Windcatcher)๋Š” โ€˜Clark-Yํ˜•โ€™ ์—์–ดํฌ์ผํ˜•ํƒœ๋กœ ๋””์ž์ธ ํ•˜์˜€์œผ๋ฉฐ, ์„ธ๋ถ€ ์—ฐ๊ตฌ๋ฐฉ๋ฒ•์€ Fig. 1๊ณผ ๊ฐ™๋‹ค.

Fig. 1. Flow chart of research.
../../Resources/sarek/KJACR.2019.31.2.081/fig1.png

2. ์ด๋ก ๊ณ ์ฐฐ

2.1 ๊ฐœ์š”

๊ฑด์ถ•๊ธฐ์ˆ ์˜ ๋ฐœ๋‹ฌ๋กœ ํ˜„๋Œ€ ๊ฑด์ถ•๋ฌผ์€ ๊ตฌ์กฐ๋‚˜ ์ž์žฌ๊ฐ€ ์šฐ์ˆ˜ํ•˜๋ฉฐ ํŠนํžˆ ๋‹จ์—ด์ด ๊ฐ•ํ™”๋˜์–ด ์นจ๊ธฐ ๋“ฑ์œผ๋กœ ๋ฐœ์ƒ๋˜๋Š” ์ž์—ฐํ™˜๊ธฐ์œจ์ด ์ƒ๋Œ€์ ์œผ๋กœ ๋‚ฎ์•„ ์‹ค๋‚ด์˜ค์—ผ๋ฌผ์งˆ์ด ์ถ•์ ๋  ์ˆ˜ ์žˆ๋‹ค. ์ด์— ๋”ฐ๋ผ ์‹ค๋‚ด์˜ค์—ผ๋ฌผ์งˆ ์ œ๊ฑฐ๋ฅผ ์œ„ํ•œ ๋ฐฉ๋ฒ•์œผ๋กœ ์™ธ๊ธฐ์˜ ์‹ ์„ ํ•œ ๊ณต๊ธฐ์œ ์ž…์„ ํ†ตํ•œ ์ž์—ฐํ™˜๊ธฐ๋ฐฉ๋ฒ•์ด ์‚ฌ์šฉ๋˜๊ณ  ์žˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜, ์ž์—ฐํ™˜๊ธฐ๋Š” ์••๋ ฅ, ํ’๋ ฅ ๋ฐ ์ค‘๋ ฅ ๋“ฑ์„ ์ด์šฉํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์™ธ๊ธฐ์˜ ๋ฐ”๋žŒ์˜ ์œ ์ž…์–‘๊ณผ ์‹ค๋‚ดโ€ค์™ธ ์˜จ๋„์ฐจ๊ฐ€ ํฌ์ง€ ์•Š์„ ๊ฒฝ์šฐ ๋†’์€ ํ™˜๊ธฐํšจ์œจ์„ ๊ธฐ๋Œ€ํ•˜๊ธฐ ํž˜๋“ค๋‹ค. ํŠนํžˆ, ์ฐฝํ˜ธ์˜ ์œ„์น˜๊ฐ€ ๋งžํ†ตํ’์œผ๋กœ ๋˜์–ด์žˆ์ง€ ์•Š์€ ๊ฒฝ์šฐ์—๋Š” ๋”์šฑ ํ™˜๊ธฐํšจ์œจ์ด ๋‚ฎ์•„์ง„๋‹ค.[7]

๋”ฐ๋ผ์„œ, ๊ณต๋™์ฃผํƒ์—์„œ ์ž์—ฐํ™˜๊ธฐ ๊ณ ๋ ค์š”์†Œ๋กœ๋Š” ์‹ค๋‚ดโ€ค์™ธ ์˜จ๋„, ํ’์† ๋ฐ ํ’ํ–ฅ ๋“ฑ๊ณผ ํ™˜๊ธฐ์ฐฝ ์œ„์น˜, ํ˜•ํƒœ, ๋ฉด์  ๋ฐ ๊ฐœ๋ฐฉ๋ฐฉ์‹ ๋“ฑ ๋‹ค์–‘ํ•œ ์กฐ๊ฑด์„ ๊ฒ€ํ† ํ•ด์•ผํ•œ๋‹ค.[11,12]

2.2 ์ง‘ํ’์žฅ์น˜(Wind Catcher)

์ง‘ํ’์žฅ์น˜๋Š” ๊ณ ๋Œ€ ์ด์ง‘ํŠธ์—์„œ ์‚ฌ์šฉ๋œ ํŽ˜๋ฅด์‹œ์•„์˜ ๊ฑด์ถ• ์š”์†Œ ์ค‘ ํ•˜๋‚˜๋กœ ํ˜„์žฌ๋Š” ์ด๋ž€, ์ด์ง‘ํŠธ, ๋‘๋ฐ”์ด ๋“ฑ ๋ฅ๊ณ  ๊ฑด์กฐํ•œ ๊ธฐํ›„์ง€์—ญ์—์„œ ๋„๋ฆฌ ์‚ฌ์šฉ๋˜๋Š” ์žฅ์น˜๋กœ ๊ณต๊ธฐ์˜ ๋Œ€๋ฅ˜ํšจ๊ณผ๋ฅผ ํ†ตํ•œ ์ž์—ฐํ™˜๊ธฐ์‹œ์Šคํ…œ์„ ์˜๋ฏธํ•œ๋‹ค.[13] ์˜ค๋Š˜๋‚ ์— ์ง‘ํ’์žฅ์น˜๋Š” ๊ฑด๋ฌผ์ƒ์ธต๋ถ€์˜ ๊ณต๊ธฐ๋ฅผ ๋ชจ์„ ์ˆ˜ ์žˆ๋„๋ก ๊ฑด๋ฌผ๋ณด๋‹ค ๋†’๊ฒŒ ์œ„์น˜ํ•œ ํƒ€์›Œํ˜•ํƒœ๋กœ ์ถ”๊ฐ€์ ์ธ ์„ค๋น„์žฅ์น˜์—†์ด ์ž์—ฐ์  ๋ฐฉ๋ฒ•์œผ๋กœ ์‹ค๋‚ด ํ™˜๊ธฐ ๋ฐ ๋ƒ‰๋ฐฉ ์žฅ์น˜๋กœ ์‚ฌ์šฉ๋œ๋‹ค.[14]

๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ์ด์™€ ๊ฐ™์€ ์ง‘ํ’์žฅ์น˜์˜ ๊ฐœ๋…์„ ๊ตญ๋‚ด ๊ณต๋™์ฃผํƒ์— ๋„์ž…ํ•˜๊ณ ์ž ์—์–ดํฌ์ผ(airfoil) ํ˜•ํƒœ๋ฅผ ์ ์šฉํ•˜์˜€๋‹ค. ์—์–ดํฌ์ผ์ด๋ž€, ๋น„ํ–‰๊ธฐ์˜ ๋‚ ๊ฐœ์™€ ๊ฐ™์€ ํ˜•์ƒ์˜ 2์ฐจ์› ๋‹จ๋ฉด์„ ๋‚˜ํƒ€๋‚ด๋Š”๋ฐ ๋ณดํ†ต ์•ž์ „(leading-edge)์„ ๋‘ฅ๊ธ€๊ฒŒ ํ•˜๊ณ  ๋’ท์ „(trailing-edge)์„ ๋พฐ์กฑํ•˜๊ฒŒ ํ•œ ์œ ์„ ํ˜• ํ˜•์ƒ์„ ์˜๋ฏธํ•œ๋‹ค. ์—์–ดํฌ์ผ์˜ ๋Œ€ํ‘œ์ ์ธ ํ˜•ํƒœ๋Š” ๋ฏธ๊ตญ์˜ ํ•ญ๊ณต์ž๋ฌธ์œ„์›(National Advisory Committee for Aeronautics; NACA)๊ฐ€ ๊ฐœ๋ฐœํ•œ ํ˜•ํƒœ์™€ Clark-Y๊ฐ€ ๊ฐ€์žฅ ์ผ๋ฐ˜์ ์ด๋‹ค. Clark-Y๋Š” 1922๋…„ Virginius E. Clark์— ์˜ํ•ด ๋””์ž์ธ ๋˜์—ˆ์œผ๋ฉฐ ํ‰ํ‰ํ•œ ๋ฐ”๋‹ฅ๋ฉด์€ ๊ฐ๋„ ์ธก์ •์„ ๋‹จ์ˆœํ™”ํ•˜์—ฌ ๋””์ž์ธํ•˜๊ธฐ ์ˆ˜์›”ํ•˜๊ธฐ ๋•Œ๋ฌธ์— ๋ฒ”์šฉ ํ•ญ๊ณต๊ธฐ ์„ค๊ณ„์— ๋„๋ฆฌ ์‚ฌ์šฉ๋˜๋Š” ์—์–ดํฌ์ผ์˜ ํ˜•ํƒœ๋กœ ๊ณต๊ธฐ์—ญํ•™ ๋ถ„์•ผ์—์„œ ๋‹ค์–‘ํ•˜๊ฒŒ ์—ฐ๊ตฌ๋˜์—ˆ๋‹ค.

๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ์ง‘ํ’๋ฃจ๋ฒ„ ๋””์ž์ธ์„ Clark-Y ์—์–ดํฌ์ผ ํ˜•ํƒœ ๊ธฐ๋ฐ˜์œผ๋กœ ์„ ์ •ํ•˜์˜€๋‹ค. Clark-Y๋Š” ์ตœ๋Œ€ ๋‘๊ป˜๋น„(Thickness ratio)๊ฐ€ 28% ์œ„์น˜์—์„œ 11.7%์ด๊ณ , ์บ ๋ฒ„(camber) 3.4%์— ์ตœ๋Œ€ ์บ ๋ฒ„ ์œ„์น˜๋Š” 42%์ด๋‹ค. ๋‹ค์Œ์˜ Fig. 2๋Š” Clark-Y ์—์–ดํฌ์ผ์˜ ๋‹จ๋ฉด๊ณผ ์–‘๋ ฅ๊ณ„์ˆ˜, ํ•ญ๋ ฅ๊ณ„์ˆ˜์˜ ํŠน์„ฑ์„ ๋‚˜ํƒ€๋‚ธ๋‹ค. Table 1์€ Clark-Y ์—์–ดํฌ์ผ์˜ ๋ฐ์ดํ„ฐ์ด๋ฉฐ X์ขŒํ‘œ์— ๋”ฐ๋ฅธ ๋ธ”๋ ˆ์ด๋“œ์˜ ์ƒโ€คํ•˜๋ถ€์˜ Y์ขŒํ‘œ ๊ฐ’์„ ์˜๋ฏธํ•œ๋‹ค. ์—์–ดํฌ์ผํ˜•์ƒ์„ ์„ค๊ณ„ํ•  ๋•Œ๋Š” ๋ธ”๋ ˆ์ด๋“œ์˜ ํฌ๊ธฐ์™€ ์ฃผ์†๋น„ ๋“ฑ์—์„œ ๋ ˆ์ด๋†€๋“œ์ˆ˜๋ฅผ ๊ณ ๋ คํ•  ํ•„์š”๊ฐ€ ์žˆ์ง€๋งŒ ์ผ๋ฐ˜์ ์œผ๋กœ๋Š” ๋ฌด์‹œํ•˜์—ฌ NRe = 100,000์ •๋„์˜ ๋ฐ์ดํ„ฐ๋ฅผ ๋ฐ”ํƒ•์œผ๋กœ ์„ค๊ณ„ํ•œ๋‹ค. ์˜๊ฐ์€ ์ƒ๋Œ€์ ์ธ ๋ฐ”๋žŒ์˜ ๋ฐฉํ–ฅ๊ณผ ๋ธ”๋ ˆ์ด๋“œ์˜ ํ˜„ ๊ธธ์ด, ์„ ๊ฐ๋„๋ฅผ ๋œปํ•˜๋Š”๋ฐ ์ด ๊ฐ๋„์— ๋”ฐ๋ผ ๋ธ”๋ ˆ์ด๋“œ์— ์ž‘์šฉํ•˜๋Š” ์–‘๋ ฅ์ด ํฌ๊ฒŒ ๋ณ€ํ™”ํ•œ๋‹ค. Clark-Y ์—์–ดํฌ์ผ์€ ์˜๊ฐ์„ 8ยฐ๋กœ ์„ค์ •ํ–ˆ์„ ๋•Œ ์ตœ๋Œ€ ์ถœ๋ ฅ์„ ์–ป์„ ์ˆ˜ ์žˆ์œผ๋ฉฐ, ํ˜•์ƒ์— ๋”ฐ๋ผ ๋ฏธ์„ธํ•˜๊ฒŒ ๋‹ค๋ฅด์ง€๋งŒ ๋ณดํ†ต ์–‘๋ ฅ๊ณ„์ˆ˜ CL = 1, ์˜๊ฐ 4~6ยฐ๋กœ ์„ค์ •ํ•˜๋ฉด ํฐ ์˜ค์ฐจ๋Š” ์—†๋‹ค.[16]

Fig. 2. Cross-section, lift and drag coefficient characteristics of Clark-Y type airfoil.
../../Resources/sarek/KJACR.2019.31.2.081/fig2.png

Table 1. Data of Clark-Y airfoil

X

Y

Upper

Bottom

0.00

3.50

3.50

1.25

5.45

1.93

2.50

6.50

1.47

5.00

7.90

0.93

7.50

8.85

0.63

10.00

9.60

0.42

15.00

10.68

0.15

20.00

11.36

0.00

30.00

11.70

0.00

40.00

11.40

0.00

50.00

10.52

0.00

60.00

9.15

0.00

70.00

7.35

0.00

80.00

5.22

0.00

90.00

2.80

0.00

95.00

1.49

0.00

100.00

0.12

0.00

2.3 ๋ฃจ๋ฒ„(Louver)

๋ฃจ๋ฒ„๋Š” ํญ์ด ์ข์€ ํŒ์„ ๋น„์Šค๋“ฌํžˆ ์ผ์ • ๊ฐ„๊ฒฉ์„ ๋‘๊ณ  ์ˆ˜ํ‰ ๋˜๋Š” ์ˆ˜์ง์œผ๋กœ ๋ฐฐ์—ดํ•œ ๊ฒƒ์œผ๋กœ์จ ์‹ค์™ธ์—์„œ๋Š” ์‹ค๋‚ด๊ฐ€ ๋ณด์ด์ง€ ์•Š๊ณ , ์‹ค๋‚ด์—์„œ๋Š” ์‹ค์™ธ๋ฅผ ๋ณด๋Š”๋ฐ ๋ถˆํŽธํ•จ์ด ์—†๋„๋ก ์„ค์น˜ํ•œ๋‹ค. ์ฃผ๋กœ ์ฑ„๊ด‘ ๋ฐ ์ผ์กฐ์กฐ์ •์— ์‚ฌ์šฉ๋˜๋ฉฐ ํ†ตํ’๊ณผ ํ™˜๊ธฐ์˜ ๋ชฉ์ ์œผ๋กœ๋„ ์‚ฌ์šฉ๋œ๋‹ค.[18] ํ™˜๊ธฐ์˜ ๋ชฉ์ ์œผ๋กœ ์‚ฌ์šฉ๋˜๋Š” ๋ฃจ๋ฒ„๋Š” ์ผ๋ฐ˜์ ์œผ๋กœ ๋ธ”๋ ˆ์ด๋“œ(blade)๊ฐ€ ์›€์ง์ด์ง€ ์•Š๋Š” ๊ณ ์ •์‹๊ณผ ์ƒํ™ฉ์— ๋”ฐ๋ผ ๊ฐœํ ๋ฐ ๊ฐ๋„์กฐ์ ˆ์ด ๊ฐ€๋Šฅํ•œ ๊ฐ€๋™์‹์œผ๋กœ ๊ตฌ๋ถ„๋˜๋ฉฐ, ๋ธ”๋ ˆ์ด๋“œ์˜ ์„ค๊ณ„์— ๋”ฐ๋ผ ํ™˜๊ธฐ๊ฐ€ ๋  ๋•Œ ๊ณต๊ธฐ ์ €ํ•ญ์„ ๋ฐ›๊ธฐ ๋•Œ๋ฌธ์— ์œ ๋™์— ์˜ํ•œ ์••๋ ฅ๋ถ„ํฌ๋‚˜ ์œ ๋™ํŒจํ„ด์— ๋”ฐ๋ผ ์„ค์น˜ ์œ„์น˜์™€ ๋ธ”๋ ˆ์ด๋“œ์˜ ๊ฐœ์ˆ˜๊ฐ€ ๊ฒฐ์ •๋œ๋‹ค.[19] ๋˜ํ•œ ๊ธฐ๊ณ„ํ™˜๊ธฐ ์‹œ์Šคํ…œ์— ๋ฃจ๋ฒ„๋ฅผ ์ ์šฉํ•˜๋ฉด ๊ณต๊ธฐ์˜ ์œ ๋Ÿ‰๊ณผ ์ทจ์ถœ๊ตฌ์—์„œ ๋ฐœ์ƒ๋˜๋Š” ์ฐจ์••์„ ์ œ์–ดํ•  ์ˆ˜ ์žˆ๋Š” ํŠน์ง•์ด ์žˆ๋‹ค.[14,15] ๋‹ค์Œ์˜ Fig. 3์€ ๊ฑด๋ฌผ์˜ ๊ฐœ๊ตฌ๋ถ€์— ์ ์šฉ๋˜๋Š” ๋ฃจ๋ฒ„์˜ ์‚ฌ๋ก€์ด๋‹ค.

Fig. 3. Louver applied to windows.[23,24]
../../Resources/sarek/KJACR.2019.31.2.081/fig3.png

3. ์ „์‚ฐ์œ ์ฒด์—ญํ•™(CFD) ์‹œ๋ฎฌ๋ ˆ์ด์…˜

3.1 ๊ฐœ์š”

๊ตญ๋‚ด KS F 2921์—์„œ๋Š” ์ž์—ฐํ™˜๊ธฐ์˜ ํ™˜๊ธฐ์„ฑ๋Šฅ ์‹œํ—˜๋ฐฉ๋ฒ•์— ๋Œ€ํ•ด ํ…Œ์ŠคํŠธ ์ฑ”๋ฒ„๋ฅผ ํ™œ์šฉํ•œ ํŒ์ •์— ๋Œ€ํ•˜์—ฌ ๋ช…์‹œํ•˜๊ณ  ์žˆ์œผ๋‚˜, ์ฑ”๋ฒ„๋ฅผ ๊ตฌ์„ฑํ•˜๊ธฐ ์ „ ์‹œ๋ฎฌ๋ ˆ์ด์…˜ ๊ธฐ๋ฒ•์„ ํ†ตํ•ด ์‚ฌ์ „ ๋ถ„์„์„ ์‹ค์‹œ ํ•  ์ˆ˜ ์žˆ๋‹ค. ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ์ง‘ํ’๋ฃจ๋ฒ„์˜ ์œ ๋ฌด์™€ ํ˜•์ƒ์— ๋”ฐ๋ฅธ ์ž์—ฐํ™˜๊ธฐ์„ฑ๋Šฅ์˜ ๋ถ„์„์„ ์œ„ํ•ด ์ „์‚ฐ์œ ์ฒด์—ญํ•™(CFD; Computational Fluid Dynamics) ๋ถ„์„์„ ์‹ค์‹œํ•˜์˜€๋‹ค.

CFD ๋ถ„์„ ํ”„๋กœ๊ทธ๋žจ์€ CD-Adapco์‚ฌ์˜ Star-CCM+(ver.13.03)๋ฅผ ์‚ฌ์šฉํ•˜์˜€์œผ๋ฉฐ, ๋‚œ๋ฅ˜๋ชจ๋ธ์€ K-epsilon ๋ชจ๋ธ์„ ์‚ฌ์šฉํ•˜์˜€๋‹ค. K-epsilon ๋ชจ๋ธ์€ ์‹ค๋‚ดยท์™ธ ๊ธฐ๋ฅ˜๋ถ„์„์— ์žˆ์–ด์„œ ๋†’์€ ์ •ํ™•๋„์˜ Tetra ๊ฒฉ์ž ํ•ด์„๋Šฅ๋ ฅ์œผ๋กœ, ์ƒ๋Œ€์ ์œผ๋กœ ํฐ ๋ชจ๋ธ๋ง์—๋„ ์—๋Ÿฌ์œจ์ด ๋‚ฎ์€ ์žฅ์ ์ด ์žˆ๊ธฐ ๋•Œ๋ฌธ์—[22,23] K-epsilon ๋ชจ๋ธ์„ ์‚ฌ์šฉํ•˜์˜€๋‹ค. ๊ด€๋ จ ๋ฐฉ์ •์‹์€ 3์ฐจ์› ์ •์ƒ์ƒํƒœ์˜ ๋น„์••์ถ•์„ฑ ์œ ๋™์ด๋ฉฐ ๋‹ค์Œ์˜ ์‹(1), ์‹(2)์™€ ๊ฐ™๋‹ค.[24]

(1)
$\frac { \partial u _ { i } } { \partial x _ { i } } = 0$

(2)
$\frac { \partial } { \partial x _ { i } } \left( \rho k u _ { j } \right) = \frac { \partial } { \partial x _ { j } } \left( \alpha _ { k } \mu _ { e f f } \frac { \partial k } { \partial x _ { j } } \right) + G _ { k } + G _ { b } - \rho \epsilon$

์—ฌ๊ธฐ์„œ,

ฯ : ๋ฐ€๋„(kg/m2)

Gk : ํ‰๊ท ์†๋„์— ์˜ํ•œ ์ƒ์„ฑํ•ญ

k : ๋‚œ๋ฅ˜ ์œ ๋™ ์—๋„ˆ์ง€(m2/s2)

Gb : ๋ถ€๋ ฅ์— ์˜ํ•œ ์ƒ์„ฑํ•ญ

ฮผ : ์ ์„ฑ๊ณ„์ˆ˜(Paโ€คs)

ฮต : ๋‚œ๋ฅ˜ ์šด๋™ ์—๋„ˆ์ง€ ์†Œ์‚ฐ์œจ(m2/s2)

๋˜ํ•œ, CFD ๋ถ„์„์˜ ๊ธฐ๋ณธ ์„ค์ •์กฐ๊ฑด์€ Table 2์™€ ๊ฐ™์œผ๋ฉฐ, ๋Œ€์ƒ ๋ชจ๋ธ์˜ ๊ทœ๋ชจ๋ฅผ ๊ณ ๋ คํ•˜๊ณ  ์‹œ๋ฎฌ๋ ˆ์ด์…˜์˜ ํšจ์œจ์ ์ธ ์ž‘๋™์„ ์œ„ํ•˜์—ฌ Mesh์˜ Base size๋ฅผ 0.01 m, Target size๋ฅผ 50%๋กœ ์„ค์ •ํ•˜์—ฌ ์ตœ์†Œ 0.005 m๊ฐ€ ๋˜๋„๋ก ์„ค์ •ํ•˜์˜€๋‹ค. ๊ฒฉ์ž ํ˜•์ƒ์€ ํšจ๊ณผ์ ์œผ๋กœ 3์ฐจ์› ํ•ด์„์ด ๊ตฌํ˜„ ๊ฐ€๋Šฅํ•œ Polyhedral mesh๋กœ ์„ค์ •ํ•˜์˜€์œผ๋ฉฐ, ๋ถ„์„ ๊ฐ„๊ฒฉ์€ 20์ดˆ ๊ฐ„๊ฒฉ์œผ๋กœ ์„ค์ •ํ•˜์˜€๋‹ค. ๋ถ„์„์€ 84 m2์˜ ๊ณต๋™์ฃผํƒ์— ์ง‘ํ’๋ฃจ๋ฒ„(Louver) ์„ค์น˜ ์œ ๋ฌด์— ๋”ฐ๋ฅธ ์ž์—ฐํ™˜๊ธฐํšจ์œจ์„ ๋น„๊ตํ•˜์˜€๋‹ค. ๋ฃจ๋ฒ„(Louver)์˜ ์„ค์น˜ ์œ ๋ฌด์— ๋”ฐ๋ฅธ ์ž์—ฐ ํ™˜๊ธฐ ๋น„๊ต ์‹œ, ์ดˆ๊ธฐ ๊ธฐ์ฒด ์„ค์ •์€ ๋‚ดยท์™ธ๋ถ€ ๋ชจ๋‘ CO2 100%๋กœ ์„ค์ •ํ•œ ๋’ค, inlet ๊ฐ’์œผ๋กœ ์„œํ’ 3.6 m/s๋กœ ์„ค์ •ํ•˜์—ฌ, ์‹œ๊ฐ„ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ์‹ค๋‚ด ๋†๋„ ๋ณ€ํ™”๋ฅผ ๋ถ„์„ํ•˜์˜€๋‹ค.

Table 2. Simulation environment setting

Item

Settings

Space

Three Dimensional

Mesh

Polyhedral Mesh

Mesh Size

Base size

0.01 m

Target size

50%(0.005 m)

Time

Analysis of windcatcher louver by angle

Steady

Analysis of windcatcher application

Implicit unsteady(Time step : 20s)

Material

Gas

Flow

Segregated Flow

Fluid state

Inlet : Air

Initial : CO2

Viscosity

Turbulent

Reynolds-turbulent flow

K-epsilon Turbulence

3.2 ์ง‘ํ’๋ฃจ๋ฒ„์„ค๊ณ„ ๋ฐ ๋ชจ๋ธ๋ง ๋ฐ ๋ถ„์„ ์กฐ๊ฑด

์ง‘ํ’๋ฃจ๋ฒ„์„ค๊ณ„๋Š” Clark-Y ์—์–ดํฌ์ผํ˜•์ƒํƒ€์ž…์œผ๋กœ ์ œ์ž‘ํ•˜์˜€๋‹ค. ๋˜ํ•œ, ๋ชจ๋ธ๋ง ๋ถ„์„์กฐ๊ฑด์€ ์„œ์šธ์˜ 2017๋…„ ํ’ํ–ฅโ€ค์†์„ ๊ธฐ์ค€์œผ๋กœ ๋ฃจ๋ฒ„ ์„ ๋‹จ์„ ์ฃผํ’ํ–ฅ์ธ ์„œํ–ฅ์œผ๋กœ ์„ค์น˜ํ•˜์˜€์œผ๋ฉฐ ํ˜„์˜ ๊ธธ์ด๋Š” 220 mm๋กœ ์„ค๊ณ„ ํ•˜์˜€๋‹ค. Fig. 4๋Š” ์ง‘ํ’๋ฃจ๋ฒ„์˜ ๋‹จ๋ฉด ๋ฐ ์ „์ฒด ํ˜•์ƒ๊ณผ ์™ธ๊ธฐ์˜ ๋ฐ”๋žŒ์ด ๋ถˆ์–ด์™”์„ ๊ฒฝ์šฐ ์ƒ์„ฑ๋˜๋Š” ์ฃผ๋ณ€์˜ ์••๋ ฅ ๋ถ„ํฌ์™€ ์„ค์น˜ ์˜ˆ์‹œ๋ฅผ ๋‚˜ํƒ€๋‚ธ๋‹ค. Clark-Y ์—์–ดํฌ์ผ์€ ์˜๊ฐ์„ 8ยฐ๋กœ ์„ค์ •ํ–ˆ์„ ๋•Œ ์ตœ๋Œ€ ์ถœ๋ ฅ์„ ์–ป์„ ์ˆ˜ ์žˆ์œผ๋ฉฐ, ํ˜•์ƒ์— ๋”ฐ๋ผ ๋ฏธ์„ธํ•˜๊ฒŒ ๋‹ค๋ฅด์ง€๋งŒ ๋ณดํ†ต ์–‘๋ ฅ๊ณ„์ˆ˜ CL = 1, ์˜๊ฐ 4~6ยฐ๋กœ ์„ค์ •ํ•˜๋ฉด ํฐ ์˜ค์ฐจ๋Š” ์—†๊ธฐ ๋•Œ๋ฌธ์— ์‹œ๋ฎฌ๋ ˆ์ด์…˜์˜ ์˜๊ฐ์€ 8ยฐ๋กœ ์„ค์ •ํ•˜์˜€๋‹ค.[16] ๊ณต๋™์ฃผํƒ ๋ชจ๋ธ๋ง์€ Fig. 5์™€ ๊ฐ™์ด ๊ตญ๋‚ด์˜ ์ผ๋ฐ˜์ ์ธ 84 m2์˜ ํ‰๋ฉด์„ ์‚ฌ์šฉํ•˜์˜€๊ณ , ์ฐฝํ˜ธ๋Š” ๋ชจ๋‘ ์—ด๋ ค ์žˆ๋Š” ์ƒํƒœ๋กœ ์„ค์ •ํ•˜์˜€๋‹ค. ์™ธ๊ธฐ์˜ ํ’์†์€ ์„œ์šธ์‹œ์˜ 2017๋…„ ํ‰๊ท  ํ’์†์ธ ํ’์† 3.6 m/s(์ง€์ƒ 10 m ๊ธฐ์ค€)๋กœ ์ ์šฉํ•˜์˜€๊ณ , Outlet์˜ ๋น„์œจ์€ ๋™, ๋‚จ, ๋ถํ–ฅ ๊ฐ๊ฐ 33%์”ฉ์œผ๋กœ ์„ค์ •ํ•˜์—ฌ Inlet์œผ๋กœ ์œ ์ž…๋œ ๊ธฐ๋ฅ˜๊ฐ€ ์ž์—ฐ์Šค๋Ÿฝ๊ฒŒ ํ๋ฅผ ์ˆ˜ ์žˆ๋„๋ก ์„ค์ •ํ•˜์˜€๋‹ค. Fig. 6์€ ๊ณต๋™์ฃผํƒ ๋ชจ๋ธ๋ง ํ›„ ๋‚จ์ธก์— 8ยฐ์˜ ์ง‘ํ’๋ฃจ๋ฒ„๋ฅผ ์ ์šฉํ•œ ๋ชจ์Šต์ด๋‹ค. ๊ตญ๋‚ด ๋Œ€๋ถ€๋ถ„์˜ ๊ณต๋™์ฃผํƒ์€ ๋‚จํ–ฅ์œผ๋กœ ๋˜์–ด ์žˆ๊ธฐ ๋•Œ๋ฌธ์— ๋Œ€๋ถ€๋ถ„์˜ ์ฐฝํ˜ธ๊ฐ€ ๋‚จ์ธก์— ์ง‘์ค‘๋˜์–ด ์žˆ๊ณ , ์ง‘ํ’ ์žฅ์น˜๋Š” ์™ธ๊ธฐ ๋ฐ”๋žŒ์„ ํ™œ์šฉํ•˜์—ฌ ๋ถ€์••์„ ํ˜•์„ฑ์‹œํ‚ค๋Š” ์žฅ์น˜์ด๊ธฐ ๋•Œ๋ฌธ์— ๋‚จํ–ฅ์— ์„ค์น˜ํ•˜์˜€๋‹ค.

Fig. 4. Clark-Y airfoil shape-based windcatcher : (a) Section of the windcatcher, (b) Modeling of the angle setting, (c) Pressure distribution of the windcatcher, (d) Overall shape of the windcatcher.
../../Resources/sarek/KJACR.2019.31.2.081/fig4.png

Fig. 5. Floor plan of apartment house used for CFD analysis.
../../Resources/sarek/KJACR.2019.31.2.081/fig5.png

Fig. 6. Modeling with the windcatcher.
../../Resources/sarek/KJACR.2019.31.2.081/fig6.png

4. ์ „์‚ฐ์œ ์ฒด์—ญํ•™(CFD) ์‹œ๋ฎฌ๋ ˆ์ด์…˜ ๊ฒฐ๊ณผ

์ง‘ํ’๋ฃจ๋ฒ„์˜ ์„ค์น˜ ์œ ๋ฌด์— ๋”ฐ๋ฅธ ์ž์—ฐํ™˜๊ธฐ์„ฑ๋Šฅ์„ ๋ถ„์„ํ•˜๊ธฐ ์œ„ํ•ด ์‹œ๋ฎฌ๋ ˆ์ด์…˜์„ ํ™œ์šฉํ•˜์—ฌ ํ‰๊ฐ€ํ•˜์˜€๋‹ค. ๋ถ„์„ ๊ฐ„๊ฒฉ์€ 20์ดˆ, 40์ดˆ, 80์ดˆ, 160์ดˆ, 320์ดˆ๋กœ ํ•˜์˜€๊ณ  Air์™€ CO2 ๋†๋„๋ฅผ ๋ถ„์„์„ ํ•˜์˜€๋‹ค. ๊ฒฐ๊ณผ๋Š” Fig. 7๊ณผ ๊ฐ™๋‹ค. ์ฆ‰, (a), (c), (e), (g), (i)๋Š” ์ง‘ํ’๋ฃจ๋ฒ„๋ฅผ ์„ค์น˜ํ•˜์ง€ ์•Š์€ ํ‰๋ฉด์ด๋ฉฐ, (b), (d), (f), (h), (j)๋Š” ์ง‘ํ’๋ฃจ๋ฒ„๋ฅผ ์„ค์น˜ํ•œ ํ‰๋ฉด์ด๋‹ค. ๋ฒ”๋ก€์—์„œ๋Š” ์™ผ์ชฝ๋ถ€๋ถ„์˜ ํŒŒ๋ž€์ƒ‰์ด Air 100%, ์˜ค๋ฅธ์ชฝ์˜ ๋ถ‰์€์ƒ‰์ด CO2 100%๋ฅผ ์˜๋ฏธํ•œ๋‹ค. ๋ถ„์„์€ ๊ฑด๋ฌผ ํ‰๋ฉด ๋‚ด์—์„œ์˜ ๋†๋„ ๋ถ„ํฌ(ํ”ฝ์…€ ์ˆ˜) ๋ณ€ํ™”๋Ÿ‰์œผ๋กœ ํ™•์ธํ•˜์˜€์œผ๋ฉฐ, ์ดˆ๊ธฐ๋†๋„(CO2) 100%์˜ ํ”ฝ์…€ ์ˆ˜๋Š” ์ด 875,663๊ฐœ์ด๋‹ค.

Fig. 7. Concentration analysis with or without windcatcher louver installation.
../../Resources/sarek/KJACR.2019.31.2.081/fig7.png

๋ถ„์„๊ฒฐ๊ณผ, ์ง‘ํ’๋ฃจ๋ฒ„๋ฅผ ์„ค์น˜ํ–ˆ์„ ๊ฒฝ์šฐ 1.2 kg/m3 ์ดํ•˜์˜ ๋†๋„๊นŒ์ง€ ๊ฐ์†Œํ•œ ๋ฐ˜๋ฉด ์ง‘ํ’ ๋ฃจ๋ฒ„๋ฅผ ์„ค์น˜ํ•˜์ง€ ์•Š์€ ๊ฒฝ์šฐ๋Š” ์•ฝ 1.4 kg/m3 ์ด์ƒ์˜ ๋†๋„๊นŒ์ง€๋งŒ ๊ฐ์†Œํ•˜์˜€๋‹ค. ๋˜ํ•œ 320์ดˆ ํ›„์˜ CO2 ํ‰๊ท ๋†๋„๋ฅผ ๋ถ„์„ํ•œ ๊ฒฐ๊ณผ ์ง‘ํ’๋ฃจ๋ฒ„๋ฅผ ์„ค์น˜ํ•˜์ง€ ์•Š์€ ํ‰๋ฉด์ด 1.52 kg/m3๋กœ 15.6% ๊ฐ์†Œํ•˜์˜€๊ณ , ์ง‘ํ’๋ฃจ๋ฒ„๋ฅผ ์„ค์น˜ํ•œ ๊ฒฝ์šฐ 1.44 kg/m3๋กœ 20% ๊ฐ์†Œํ•˜์˜€๋‹ค. ์ƒ์„ธํ•œ ๋†๋„ ๋ณ€ํ™”๋Ÿ‰์€ Table 3๊ณผ ๊ฐ™๋‹ค. Fig. 8์€ ๊ณต๊ธฐ๊ฐ€ ์‹ค๋‚ด๋กœ ์œ ์ž…๋˜๋Š” ๊ธฐ๋ฅ˜ ๋ถ„์„์„ ๋ณด์—ฌ์ฃผ๊ธฐ ์œ„ํ•œ ๋‹จ๋ฉด์ด๋ฉฐ ์ƒ๋ถ€์™€ ํ•˜๋ถ€์˜ ๊ธฐ๋ฅ˜๊ฐ€ ๋ฐ˜๋Œ€๋กœ ๋‚˜ํƒ€๋‚˜๋Š” ๊ฒƒ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ๋‹ค. Fig. 9๋Š” ๋ฃจ๋ฒ„๋ฅผ ์„ค์น˜ํ•œ ๊ฒฝ์šฐ์™€ ์„ค์น˜ํ•˜์ง€ ์•Š์€ ๊ฒฝ์šฐ์˜ ๊ฐ ๊ณต๋™์ฃผํƒ ๊ฑฐ์‹ค ์ค‘์•™์˜ CO2 ๋†๋„๋ณ€ํ™” ๊ทธ๋ž˜ํ”„์ด๋‹ค. ๋ฃจ๋ฒ„๋ฅผ ์„ค์น˜ํ•œ ๊ฒฝ์šฐ์˜ CO2 ๋†๋„๊ฐ€ ๋” ๋‚ฎ๊ฒŒ ๋‚˜ํƒ€๋‚˜๋Š” ๊ฒƒ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ๋‹ค.

Table 3. Concentration variation with time

Floor plan without windcatcher louver

Floor plan with windcatcher louver

Time

Concentration

Number of pixels (Ratio)

Time

Concentration

Number of pixels (Ratio)

0s

1.8 kg/m3

875,663(100%)

0s

1.8 kg/m3

875,663(100%)

20s

< 1.8 kg/m3

427,447(48.8%)

20s

< 1.8 kg/m3

521,897(59.6%)

< 1.6 kg/m3

304,951(34.8%)

< 1.6 kg/m3

191,235(21.8%)

< 1.4 kg/m3

143,265(16.4%)

< 1.4 kg/m3

125,166(14.3%)

< 1.2 kg/m3

0

< 1.2 kg/m3

36,993(4.2%)

320s

< 1.8 kg/m3

109,756(12.5%)

320s

< 1.8 kg/m3

96,953(11.1%)

< 1.6 kg/m3

302,586(34.6%)

< 1.6 kg/m3

152,015(17.4%)

< 1.4 kg/m3

463,115(52.9%)

< 1.4 kg/m3

459,042(52.4%)

< 1.2 kg/m3

0

< 1.2 kg/m3

167,919(19.2%)

Fig. 8. Horizontal section for airflow analysis, (a) upper part of louver, (b) lower part of louver.
../../Resources/sarek/KJACR.2019.31.2.081/fig8.png

Fig. 9. Change of Indoor CO2concentration.
../../Resources/sarek/KJACR.2019.31.2.081/fig9.png

5. ๊ฒฐ ๋ก 

๋ณธ ์—ฐ๊ตฌ๋Š” ๊ณต๋™์ฃผํƒ์˜ ์ฐฝํ˜ธ ๊ฐœ๊ตฌ๋ถ€์— ์—์–ดํฌ์ผํ˜•ํƒœ์˜ ์ง‘ํ’์žฅ์น˜(Windcatcher)๋ฅผ ์ ์šฉํ•˜์—ฌ ์ž์—ฐํ™˜๊ธฐ์˜ ํšจ์œจ์„ ์ƒ์Šน์‹œํ‚ค๊ณ ์ž ์ „์‚ฐ์œ ์ฒด์—ญํ•™(CFD; Computational Fluid Dynamics) ์‹œ๋ฎฌ๋ ˆ์ด์…˜์„ ์‹ค์‹œํ•œ ๊ฒƒ์œผ๋กœ ์—ฐ๊ตฌ๊ฒฐ๊ณผ๋ฅผ ์š”์•ฝํ•˜๋ฉด ๋‹ค์Œ๊ณผ ๊ฐ™๋‹ค.

(1) Clark-Y ์—์–ดํฌ์ผํ˜•์ƒ์€ ์˜๊ฐ 8ยฐ์ผ ๋•Œ ๋ฃจ๋ฒ„์˜ ์ƒ๋ถ€ ๋ถ€์•• ํ˜•์„ฑ ๋ฉด์ ์ด ๊ฐ€์žฅ ๋„“์–ด์ ธ 8ยฐ์—์„œ ํ’์†์ด ๊ฐ€์žฅ ๋นจ๋ผ์ง„๋‹ค.

(2) ์˜๊ฐ 8ยฐ์˜ ์ง‘ํ’๋ฃจ๋ฒ„๋ฅผ ๊ณต๋™์ฃผํƒ์— ์„ค์น˜ํ•œ ๊ฒฐ๊ณผ ์„ค์น˜ํ•˜์ง€ ์•Š์€ ๊ฒฝ์šฐ๋ณด๋‹ค ๋†’์€ ์ž์—ฐํ™˜๊ธฐ์œจ์ด ๋‚˜ํƒ€๋‚œ๋‹ค.

(3) ์˜๊ฐ 8ยฐ์˜ Clark-Y ์—์–ดํฌ์ผํ˜•์ƒ ์ง‘ํ’๋ฃจ๋ฒ„ ์„ค์น˜ ์œ ๋ฌด์— ๋”ฐ๋ฅธ CO2 ๋†๋„(1.8 kg/ใŽฅ) ๋น„๊ต๊ฒฐ๊ณผ, ์ง‘ํ’๋ฃจ๋ฒ„๋ฅผ ์„ค์น˜ํ•œ ๊ฒฝ์šฐ ์ž์—ฐํ™˜๊ธฐ ์„ฑ๋Šฅ์ด 4.6% ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค.

๋”ฐ๋ผ์„œ, ์ง€๊ธˆ๊นŒ์ง€์˜ ์—ฐ๊ตฌ๊ฒฐ๊ณผ๋ฅผ ์ข…ํ•ฉํ•ด ๋ณด๋ฉด ๊ณต๋™์ฃผํƒ ์ฐฝํ˜ธ ๊ฐœ๊ตฌ๋ถ€์— Clark-Y ์—์–ดํฌ์ผํ˜•์ƒ์˜ ์ง‘ํ’์žฅ์น˜ (Windcatcher)๋ฅผ ์ ์šฉ ์‹œ ์•ฝ 4.6% ์ž์—ฐํ™˜๊ธฐํšจ์œจ ํ–ฅ์ƒ๊ณผ ํŠนํžˆ ์˜๊ฐ 8ยฐ์—์„œ ์ตœ๋Œ€ํšจ๊ณผ๋ฅผ ๊ธฐ๋Œ€ํ•  ์ˆ˜ ์žˆ๋‹ค.

ํ›„ ๊ธฐ

๋ณธ ์—ฐ๊ตฌ๋Š” ๊ตญํ† ๊ตํ†ต๋ถ€ ๊ตญํ† ๊ตํ†ต๊ธฐ์ˆ ์ด‰์ง„์—ฐ๊ตฌ์‚ฌ์—…์˜ ์—ฐ๊ตฌ๋น„์ง€์›(18CTAP-C133322-02)์— ์˜ํ•ด ์ˆ˜ํ–‰๋˜์—ˆ์Šต๋‹ˆ๋‹ค.

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