CO2 hydrate cooling system and LCC analysis for energy transportation application

Jae Woo Choi, Shol Kim, Yong Tae Kang

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Recently, many researchers have investigated alternative refrigerants in order to replace CFC and HCHC refrigerants. One of the alternative refrigerants is CO2 hydrate slurry that has a large latent heat (507 kJ/kg). In this study, we carry out an economic evaluation of the CO2 hydrate cooling system by Life-cycle cost (LCC) analysis technique. LCC consists of the key parameters such as initial cost (IC), energy cost (EC) and maintenance cost (MC). Total LCC for a district cooling system (DCS) and CO2 hydrate cooling systems is compared for long distance energy transportation application. It is found that the total LCC for the CO2 hydrate cooling system is only a half of that of the DCS based on the cooling capacity of 5000 RT, the transportation distance of 10 km, and the service life of 20 years. It is concluded that the optimum transportation pipe diameters for CO2 hydrate and DCS are 200 mm and 400 mm, respectively, for the present basis conditions. It is also concluded that the effect of the pump power rate of the DCS on the total LCC is 2.5 times higher than that of the CO2 hydrate cooling system.

Original languageEnglish
Pages (from-to)11-18
Number of pages8
JournalApplied Thermal Engineering
Publication statusPublished - 2015 Aug 24

Bibliographical note

Funding Information:
This work was supported by the Korea CCS R&D Center (KCRC) grant funded by the Korea government (Ministry of Science, ICT & Future planning) (No. NRF-2014M1A8A1049304 ).

Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.


  • CO hydrate
  • Cooling application
  • Economic assessment
  • Energy transportation

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering


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