A combined power cycle using refuse incineration and LNG cold energy

Takahiko Miyazaki, Y. T. Kang, A. Akisawa, T. Kashiwagi

Research output: Contribution to journalArticle

89 Citations (Scopus)

Abstract

The objectives of this paper are to develop a combined power generation cycle using refuse incineration and LNG cold energy, and to conduct parametric analysis to investigate the effects of key parameters on the thermal and exergy efficiencies. The combined cycle consists of an ammonia-water Rankine cycle with refuse incinerator and a LNG cold energy cycle. The combined cycle is compared with the conventional steam Rankine cycle. It was found that the thermal and the exergy efficiencies of the combined cycle were 1.53 and 1.43 times higher than those of the conventional cycle, respectively. The ammonia condensing temperature, turbine inlet and outlet pressures and overall conductance (UA) of the condenser are considered as the key parameters. The thermal and the exergy efficiencies increase with increasing the turbine inlet pressure. As the turbine outlet pressure increases, the thermal efficiency of the combined cycle decreases while the exergy efficiency increases. The present model can be applied to obtain optimum conditions of the key parameters for performance improvement of the combined cycle.Cp specific heat (kJ/kgK)E exergy (kJ/kg)H enthalpy (kJ/kg)HX heat exchangerLHV lower heating value (kJ/kg)LMTD log mean temperature differenceṁ mass flow rate (kg/s)P pressure (kPa)Q heat transfer rate (kW)T temperature (K)UA overall heat conductance (kW/K)W work (kW)η efficiencySubscriptsA airCG city gasex exergyG garbageINC incineratorL LNG cycleN NH3/H2O cycleTN1 turbine 1TN2 turbine 2P1 pump 1P2 pump 2O reference (ambient)

Original languageEnglish
Pages (from-to)639-655
Number of pages17
JournalEnergy
Volume25
Issue number7
DOIs
Publication statusPublished - Jan 1 2000

Fingerprint

Refuse incineration
Liquefied natural gas
Exergy
Turbines
Rankine cycle
Ammonia
Turbine pumps
Intake systems
Refuse incinerators
Temperature
Specific heat
Power generation
Hot Temperature
Enthalpy
Steam
Flow rate
Pumps
Heat transfer
Heating

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

A combined power cycle using refuse incineration and LNG cold energy. / Miyazaki, Takahiko; Kang, Y. T.; Akisawa, A.; Kashiwagi, T.

In: Energy, Vol. 25, No. 7, 01.01.2000, p. 639-655.

Research output: Contribution to journalArticle

Miyazaki, Takahiko ; Kang, Y. T. ; Akisawa, A. ; Kashiwagi, T. / A combined power cycle using refuse incineration and LNG cold energy. In: Energy. 2000 ; Vol. 25, No. 7. pp. 639-655.
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