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 ● 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 Mechanical Engineering ME462/562 Sustainable Energy: Thermal storage 2/12 an Exergy Analysis
High-temperature, utility-scale Mechanical Engineering ME462/562 Sustainable Energy: Thermal storage 3/12 an Exergy Analysis
Low-temperature, utility-scale Mechanical Engineering ME462/562 Sustainable Energy: Thermal storage 4/12 an Exergy Analysis
Low-temperature, residential scale Mechanical Engineering ME462/562 Sustainable Energy: Thermal storage 5/12 an Exergy Analysis
Cold storage, commercial Mechanical Engineering ME462/562 Sustainable Energy: Thermal storage 6/12 an Exergy Analysis
Residential peak power by end-use thermal storage can address part or all of the cooling load Mechanical Engineering ME462/562 Sustainable Energy: Thermal storage 7/12 an Exergy Analysis
System benefjts of thermal storage peak load unused baseload Mechanical Engineering ME462/562 Sustainable Energy: Thermal storage 8/12 an Exergy Analysis
Thermal storage for trough CSP Mechanical Engineering ME462/562 Sustainable Energy: Thermal storage 9/12 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 ower block block ● 280 MW Rankine-cycle ● steam turbine with wet cooling and natural gas backup Ther Th erma mal l st stor orage ge ● 2-tank indirect; 6 hours ● capacity; molten salt Mechanical Engineering ME462/562 Sustainable Energy: Thermal storage 10/12 an Exergy Analysis
Storage for power tower CSP Mechanical Engineering ME462/562 Sustainable Energy: Thermal storage 11/12 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 ower block block ● 19.9 MW Rankine-cycle ● steam turbine with wet cooling and natural gas backup Ther Th erma mal l st stor orage ge ● 2-tank direct; 15 hours ● capacity; molten salt Mechanical Engineering ME462/562 Sustainable Energy: Thermal storage 12/12 an Exergy Analysis
Recommend
More recommend
