엔지니어링/경제성 모델을 이용한 이산화탄소 수송 파이프라인 설계 최적화

Abstract

This study calculates the optimum pipeline design for CO2 transport with application to CCS by using an Engineering-Economic model. Major design factors are diameter and material of pipeline, and pressure conditions. The target pipeline route is from Boryeong Thermal Power Plant to Ulleung Basin, where onshore and offshore section lengths are 470 km and 60 km, respectively. We assume two transport CO2 rates, namely 1 MtCO2/year and 3 MtCO2/year. Since the pipe diameter directly affects the cost of pipeline construction and pressure loss in pipe, the optimum thickness and material are established first for each of pipe diameters, and then we select the pipeline diameter that shows minimum total cost as an optimum pipeline diameter. The pipe diameters used in this study range from 150 mm to 500 mm in 50 mm steps to match the standard pipe size. For 1 MtCO2/year transport rate, the Diameter Nominal (DN) 200 mm, API 5L X52, Schedule 20 carbon steel pipe shows minimum cost. Three boosters are required and pressure drop between boosters are 5.59 MPa. However, DN 250 mm pipe shows similar cost and number of booster required is one. For 3 MtCO2/year transport ratee, DN 350 mm, API 5L X70, Schedule 20 pipe shows minimum cost and the required number of booster is one. route is from Boryeong Thermal Power Plant to Ulleung Basin, where onshore and offshore section lengths are 470 km and 60 km, respectively. We assume two transport CO2 rates, namely 1 MtCO2/year and 3 MtCO2/year. Since the pipe diameter directly affects the cost of pipeline construction and pressure loss in pipe, the optimum thickness and material are established first for each of pipe diameters, and then we select the pipeline diameter that shows minimum total cost as an optimum pipeline diameter. The pipe diameters used in this study range from 150 mm to 500 mm in 50 mm steps to match the standard pipe size. For 1 MtCO2/year transport rate, the Diameter Nominal (DN) 200