Selected references

2.0 MW HYBRID SOLAR THERMAL WITH STORAGE



Plant type Hybrid | Heat recovery from waste heat of cement factory | Solar collectors with pebble stone thermal storage
Location Ait Baha | Morocco
Customer Italcementi Group 
Solar field area Aperture area: 6,159 m2
Nr. of string 3
String length 215 m 
DNI 2,400 kWh/m2 year
Storage capacity 18 HR 12 hours
ORC electric power 2 MWe
Turboden unit Turboden  18 HR
Thermal power 4 MWth

 







ONGOING PROJECTS


 

ONGOING PROJECT| 1


› ORC fed directly by saturated steam from solar field

 No thermal storage 

 

Process description 

Solar field produces biphase steam with quality about 0.5 (1). The  steam  flows  into  a thermal  buffer  equipped  with recirculation  system  to feed  the ORC  with saturated steam (2) and to recirculate the liquid part back to the solar field (4). 

In such configuration, the energy production for a 10,000 m2  absorbing surface (per MWel) plant can amount up to 1,900 equivalent hours in a site where the DNI is about 2,000 [kWh/m2 _year] 


ONGOING PROJECT | 2


› ORC fed by thermal oil

 Thermal oil both as Heat Transfer Fluid and as storage medium

 Fresnel or small medium parabolic troughs solar collectors

 Two tanks direct thermal storage system 

 

Process description

Turboden HRS units fed with thermal oil at about 300°C (point 2). Thermal oil back to the solar field at about 200°C (point 4) 

In such configuration, the energy production for a 10,000–15,000 m2/MWel absorbing surface plant with a 1 equivalent hour thermal storage can amount  up to 2,400 equivalent hours in a site where the DNI is about 2,000 [kWh/m2_year] 

   

ONGOING PROJECT | 3


› ORC fed by thermal oil

 Thermal storage with molten salt

 

Process description

A non-pressurized, non-harmful synthetic oil is used in the solar field, working from 200°C (point 4) to 330°C (point 1) 

Molten salt ternary mixture with a low freezing point is employed in the two tanks indirect high capacity thermal storage system. 

In such configuration, the energy production for a 20,000–25,000 m2/MWel absorbing surface plant equipped with a 10–12 equivalent hours thermal storage, can amount  up to 6,000 equivalent hours in a site where the DNI is about 2,000 [kWh/m2_year] 

 

 

 

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