Plant	Shouhang Dunhuang Phase I
Location	China
Owner(s)	Shouhang
Capacity (MW)	10
Construction Start Date	Aug. 2014
Construction End Date	2016
Generation Start Year	2016
Construction Cost ($)	420 mil
Cost pkWh ($)	6557.8
Heliostat Aperture Area (m²)	115.7
Heliostat Manufacturer	Shouhang China
Mirror Manufacturer	Shanghai Yaohua Pikington Glass Group
Mirror Model	Super clear float glass
Heliostat Dimension	10.8m x 10.8m
Heliostat Facets (C x R)	7x5
Solar Field Area (m²)	175375
Heliostat Cost pm² ($)	149.58
Tower Height (m)	138
Receiver Fluid	Molten Salt
Receiever Manufacturer	Shouhang China
Receiver Model	External - Cylindrical
Number of Heliostats	1525
Tower Position (Lat/Long)	(40.083,94.434)

General Plant Data

·       Location: China

·       Owner(s): Shouhang

·       Capacity (MW): 10

Source: http://www.cspfocus.cn/en/market/detail_972.htm

Plant Timeline

·       Construction Start Date: Aug. 2014

·       Construction End Date: 2016

·       Generation Start Year: 2016

Plant Costs

·       Construction Cost ($): 420 mil

·       Cost pkWh ($): 6557.8

Heliostat Design

·       Heliostat Aperture Area (m²): 115.7

·       Heliostat Manufacturer: Shouhang China

·       Mirror Manufacturer: Shanghai Yaohua Pikington Glass Group

·       Mirror Model: Super clear float glass

·       Heliostat Dimension: 10.8m x 10.8m

·       Heliostat Facets (C x R): 7x5

·       Solar Field Area (m²): 175375

·       Heliostat Cost pm² ($): 149.58

Source: http://www.cspfocus.cn/en/market/detail_972.htm

Tower/Receiver

·       Tower Height (m): 138

·       Receiver Fluid: Molten Salt

·       Receiever Manufacturer: Shouhang China

·       Receiver Model: External - Cylindrical

Source: http://www.cspfocus.cn/en/market/detail_972.htm

Source: http://gansu.gscn.com.cn/system/2018/11/20/012066573.shtml

Plant Layout

·       Number of Heliostats: 1525

·       Tower Position (Lat/Long): (40.083,94.434)

Source: https://www.google.com/maps/place/40%C2%B004'58.8%22N+94%C2%B026'02.4%22E/@40.0842851,94.4311301,1344m/data=!3m1!1e3!4m4!3m3!8m2!3d40.083!4d94.434?hl=en&entry=ttu

Local Environmental Conditions

 

This project is located in Dunhuang, China. Dunhuang is located in Gobi desert, which has an average precipitation of 38.9mm, the annual average wind speed is 2m/s, and average annual dust days about 5~6 days. The average temperature during a year is about 9.4 degree Celsius and the DNI is about 1777 kWh/m².

Lessons Learned

·       Shouhang Dunhuang 10MW project is a fully molten salt heat exchange type solar thermal power plant.

·       The insulation of the hot and cold storage tanks is one of the key technologies, which requires complex design calculations and technical comparisons for both the tank body and the tank bottom.

·       The design of the evaporation island utilizes a forced circulation scheme on the water side, and the choice of circulation ratio is one of the key parameter.

·       The U-shape heat exchanger is a relatively safe and reliable saltwater heat exchanger, but it comes with higher costs.

·       Cleaning the mirrors is crucial for ensuring the high efficiency of the power plant, especially in the region with lots of dust.

Source:
“基于首航10MW熔盐塔式光热发电项目的系统集成经验_设计.” Www.sohu.com, 2 Nov. 2018, www.sohu.com/a/272805898_734062. Accessed 23 Oct. 2023.