CO<inf>2</inf> hydrate cooling system and LCC analysis for energy transportation application

Jae Woo Choi, Shol Kim, Yong Tae Kang

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Recently, many researchers have investigated alternative refrigerants in order to replace CFC and HCHC refrigerants. One of the alternative refrigerants is CO<inf>2</inf> hydrate slurry that has a large latent heat (507 kJ/kg). In this study, we carry out an economic evaluation of the CO<inf>2</inf> 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 CO<inf>2</inf> hydrate cooling systems is compared for long distance energy transportation application. It is found that the total LCC for the CO<inf>2</inf> 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 CO<inf>2</inf> 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 CO<inf>2</inf> hydrate cooling system.

Original languageEnglish
Pages (from-to)11-18
Number of pages8
JournalApplied Thermal Engineering
Volume91
DOIs
Publication statusPublished - 2015 Aug 24

Keywords

  • CO<inf>2</inf> hydrate
  • Cooling application
  • Economic assessment
  • Energy transportation

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

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