Thermal Energy Storage Mechanical Engineering ME462/562 - - PowerPoint PPT Presentation

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Thermal Energy Storage Mechanical Engineering ME462/562 - - PowerPoint PPT Presentation

Mar 30, 2024 163 likes •296 views

ME 462/562: Sustainable Energy an Exergy Analysis Spring 2014 Thermal Energy Storage Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis Why thermal storage? Supply and demand for heat / cool not coincident

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Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

ME 462/562: Sustainable Energy – an Exergy Analysis Spring 2014

Thermal Energy Storage

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Thermal storage 2/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Why thermal storage?

  • Supply and demand for heat / cool not coincident
  • Increase in capacity without bigger equipment
  • Better operation of co-gen plants
  • Dispatchability of solar thermal electric plants
  • Shift energy purchase to low-cost period
  • Increase system reliability
  • Integration with other functions
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Thermal storage 3/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

High-temperature, utility-scale

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Thermal storage 4/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Low-temperature, utility-scale

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Thermal storage 5/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Low-temperature, residential scale

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Thermal storage 6/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Cold storage, commercial

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Thermal storage 7/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Residential peak power by end-use

thermal storage can address part or all of the cooling load

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Thermal storage 8/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

System benefjts of thermal storage

peak load unused baseload

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Thermal storage for trough CSP

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Thermal storage 10/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Solana CSP plant (Gila Bend, AZ)

  • Sola

Solar fj fjeld eld

  • Abengoa solar – Rioglass

mirrors – Schott receivers; thermal oil heat medium

  • Power
  • wer block

block

  • 280 MW Rankine-cycle

steam turbine with wet cooling and natural gas backup

  • Th

Ther erma mal l st stor

  • rage

ge

  • 2-tank indirect; 6 hours

capacity; molten salt

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Storage for power tower CSP

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Thermal storage 12/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Gemasolar plant (Seville, Spain)

  • Sola

Solar fj fjeld eld

  • 2650 x 120 m2 heliostats,

140 m tower, molten salt heat medium 290C to 565C

  • Power
  • wer block

block

  • 19.9 MW Rankine-cycle

steam turbine with wet cooling and natural gas backup

  • Th

Ther erma mal l st stor

  • rage

ge

  • 2-tank direct; 15 hours

capacity; molten salt