A Performance Measurement and Evaluation of a 400RT Vertical type Geothermal System installed in a Complex Building Before Occupancy

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(1)황광일. 복합용도 건물에 적용된 400RT급 수직형 지열시스템의 입주전 성능평가 * ***. ([email protected]), ** ([email protected]), ([email protected], [email protected], [email protected]). A Performance Measurement and Evaluation of a 400RT Vertical type Geothermal System installed in a Complex Building Before Occupancy. *. Div. of Mechanical and Information Engineering, Korea Maritime University([email protected]), ** Graduate School of Korea Maritime University([email protected]), *** Samsung C&T([email protected], [email protected], [email protected]). 400RT geothermal system which is the biggest capacity among on-operations at present in Korea is measured and evaluated on 23rd~26th Jan. 2008 during those days building is not allowed owners and/or tenants to move in. The geothermal system is consist with vertical-typed 112 geothermal heat exchangers which are installed circle-like 1 row with 4m interval, and has 16 units of 25USRT geothermal-source heat pump(GSHP)s. And each 5 units of circulation pump are running for geothermal heat exchangers and hot water supplies. The followings are the results. The temperatures at G.L. -70m of 2 boreholes are varied quite similarly. The average temperature difference between inlet and outlet of geothermal pipes is 4.1℃, and that of hot water supply is 3.2℃, of Zone 3's each 4 GSHPs when being operated. Despite temperature fluctuations by heating loads, the average temperature difference between main pipes of inlet and outlet of geothermal heat exchangers is measured as 4.1℃. This study propose "Geothermal System COP" which includes not only consumed electric power by compressor but also circulation pumps and auxiliary utilities. By comparing the geothermal system COP with GSHP's performance specification, it is clear that the performances of GHSPs of this site are satisfied with the specification. (Geothermal System), (Performance Evaluation). (Complex Building),. Journal of the Korean Solar Energy Society Vol. 28, No. 3, 2008. 7.

(2) 2). 2004. 3. “ ․. ․. ”. . 3,4). 5 . 2008 3 1,835. 3. . 11. 2,702. ,. .. 4). . CFD. 1,642 , 435 , 3. 287 2,702. , ,. 87.5%. , ,. 11 3. 30. ,. ,. .1). 2007. .. .. 365 70. . .. ,. , , 1, ,. 1. 4. (棟). , D. know-how .. . D .. 2 400RT. , .. 8. 1.. ( ,. ). 한국태양에너지학회 논문집 Vol. 28, No. 3, 2008.

(3) 황광일. . ① ② ③ ④ ⑤ ⑥. : : : : : :. 19,138㎡ 11,478㎡ 152,569㎡ 4 , 22 4棟 , THK24 Low-e THK3 AL Sheet. ,. ,. ,. ,. 30A, (. 4m, HDPE ),. GS2000 200m, , 4. GLD 112 (. 3) .. 112. ㄷ. 2 1. . 4. , 3. .. 400USRT(25USRT×16 ) 16 (Zone). ,. , 5. Journal of the Korean Solar Energy Society Vol. 28, No. 3, 2008. 9.

(4) . (2008.01.23~01.26) , , .. (1). . (. 4, 5). 4m. 4 , 3. #4, #5 70m, 170m .. 4 , ,. 6. 7. 70m, 170m , 1. (DAQ). . 70m. . (. 3). 8 (On) ,. ,. 15. (. ) (. ,. ,. #4, #5 70m. on/off .. ). . (Off) .. . (2) , , 9. On/Off. 10. .. .. 한국태양에너지학회 논문집 Vol. 28, No. 3, 2008.

(5) 황광일. 25. 250. 20. 200. 15. 150. 20. 10. 100. 16. 5. 50. Temperature[℃]. .. 온도 [℃]. 300. 0. 12. 유량 [CMH]. 30. 0. Jan 24th 0:00. Jan 24th 12:00. Jan 25th 0:00. Jan 25th 12:00. Jan 26th 0:00. Jan 26th 12:00. 8. 4 Borehole #4. Borehole #5. (3). 0 Jan 22th Jan 23th Jan 24th Jan 25th Jan 26th Jan 27th Jan 28th Jan 29th 0:00 0:00 0:00 0:00 0:00 0:00 0:00 0:00. 400USRT , 25USRT 4 (Zone) 4 (Zone Control). 1 20. Temperature[℃]. 16. .. 12. 3 8. 4. (Zone 3) (unit #1~#4). ,. 4 Borehole #4. Borehole #5. .. 10~13. 0. , 4. Jan 22th Jan 23th Jan 24th Jan 25th Jan 26th Jan 27th Jan 28th Jan 29th 0:00 0:00 0:00 0:00 0:00 0:00 0:00 0:00. 4℃ 3℃. , 18 16. GTPZ4_in_EX. GTPZ4_out_EX. 70m (No.4). H_zone4-ON. . 70. 12 60. 10 50. 8 6 4 2 0 Jan 24th Jan 24th Jan 24th Jan 24th Jan 25th Jan 25th Jan 25th Jan 25th Jan 26th 0:00 6:00 12:00 18:00 0:00 6:00 12:00 18:00 0:00. Temperature[℃]. Temperature[℃]. 14. 40 30 20 10 0 Jan 25th 0:00. Journal of the Korean Solar Energy Society Vol. 28, No. 3, 2008. Jan 25th 2:00. Jan 25th 4:00. Jan 25th 6:00. Jan 25th 8:00. Jan 25th 10:00. Jan 25th 12:00. 11.

(6) 70. 16. 60. 12 Temperature[℃]. Temperature[℃]. 50 40 30 20. 8. 4. 10 0 Jan 25th 0:00. Jan 25th 2:00. Jan 25th 4:00. Jan 25th 6:00. Jan 25th 8:00. Jan 25th 10:00. Jan 25th 12:00. 0 Jan 24th 0:00. Jan 24th 12:00. Jan 25th 0:00. Jan 25th 12:00. Jan 26th 0:00. Jan 26th 12:00. 70 60. Temperature[℃]. 50 40. ,. 30. COP. 20. .. 10 0 Jan 25th 0:00. Jan 25th 2:00. Jan 25th 4:00. Jan 25th 6:00. Jan 25th 8:00. Jan 25th 10:00. Jan 25th 12:00. , 1. 70. COPghp. 60. .. 50 Temperature[℃]. 15. 40. (1) COPghp. 30 20. COPgts. 10. (2) .. 0 Jan 25th 0:00. Jan 25th 2:00. Jan 25th 4:00. Jan 25th 6:00. 4℃. 12. Jan 25th 10:00. Jan 25th 12:00.  .  .  .      . COPghp. (Main pipe) 14. 2℃. Jan 25th 8:00. ,. :. COPgts. :. Qghp. :. Eghp. :. Epump. :. Eetc. :. … (1) … (2). COP COP. .. 한국태양에너지학회 논문집 Vol. 28, No. 3, 2008.

(7) 황광일. , , ,. ,. COPgts . 1. 2008. 24. 14. ~15 ( 지열 흡열량. 5) (. 6) 4.0~5.3. .. .. 12 COPgts 4.26 (2). COPgts (1) COPghp. 4.03~4.65 7. 시. 시. 시. 시. 시. 시. 시. 시. 시. 시. 실내 공급량. 전력 소비량. COPgts COPghp. 4.26. . , 400RT. . . . (1) 4m. 2. 70m . 70m .. (2) 4.1℃, 3. 2℃ (3). Journal of the Korean Solar Energy Society Vol. 28, No. 3, 2008. . (Main pipe). 13.

(8) 4. 1℃. . 7. 北海道大学․地中熱利用システム工学講座, 地中熱ヒートポンプシステム, Ohmsha, 2007. (4) “. COPgts”. . (5). COPgts 4.26 (2). .. 4.03~ 4.65 COPgts (1) COP. COPghp ,. COPgts. COPghp. .. 1.. 14. , http://racer.kemco.or.kr. 한국태양에너지학회 논문집 Vol. 28, No. 3, 2008.

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