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Performance Design of an Exhaust Superheater for Waste Heat Recovery of Construction Equipment

  • Hyung Seok Heo
  • Suk Jung Bae
  • Sung Mok Hong
  • Seung Uk Park
Article
  • 62 Downloads

Abstract

Although fuel cost has been the largest portion of annual operating costs of construction equipment, it is possible to save the energy and reduce cost using fuel economy enhancement technology. In this study, an organic Rankine cycle is applied to an excavator in order to recover waste heat, reproduce it into electrical energy, and consequently reduce the fuel consumption by 10 %. A design process was carried out to develop an exhaust gas superheater that recovers the waste heat from exhaust gas through a composite-dimensional thermal flow analysis. A one-dimensional code was developed to perform a size design for the exhaust gas superheater. The ranges for the major design parameters were determined to satisfy the target of the heat recovery, as well as the pressure drop at both fluid sides. Performance analysis was done through onedimensional design code results, which were compared with three-dimensional CFD analysis. By utilizing a 3D commercial code, the arrangement of the tubes was selected and the working fluid pressure drop was reduced through a detailed layout design. The design procedure was verified by a performance evaluation of the prototype, which yielded only a 7 % tolerance in heat recovery.

Key Words

Excavator Construction equipment Waste heat recovery system Rankine cycle Superheater Heat recovery Spiral tube 

Nomenclature

ΔP

pressure drop, kPa

ΔT

temperature difference, °C

Q

heat, kW

T

temperature, °C

Subscripts

exh

exhaust

i

inlet

o

outlet

W/F

working fluid

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References

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Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Hyung Seok Heo
    • 1
  • Suk Jung Bae
    • 1
  • Sung Mok Hong
    • 2
  • Seung Uk Park
    • 2
  1. 1.Convergence Parts Technology R&D DivisionKorea Automotive Technology InstituteChungnamKorea
  2. 2.R&D Center, Haesong Engineering Co., Ltd.ChungbukKorea

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