Viability of a concentrated solar power system in a low sun belt prefecture

doi:10.1007/s11708-020-0664-5

Frontiers in Energy

2020, Vol. 14

Issue (4): 850-866 https://doi.org/10.1007/s11708-020-0664-5

本期目录

Viability of a concentrated solar power system in a low sun belt prefecture

Rahul BHATTACHARJEE, Subhadeep BHATTACHARJEE(

)

Department of Electrical Engineering, National Institute of Technology (NIT), Agartala, Tripura Pin-799046, India

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Abstract：

Concentrating solar power (CSP) is considered as a comparatively economical, more efficient, and large capacity type of renewable energy technology. However, CSP generation is found restricted only to high solar radiation belt and installed where high direct normal irradiance is available. This paper examines the viability of the adoption of the CSP system in a low sun belt region with a lower direct normal irradiance (DNI). Various critical analyses and plant economics have been evaluated with a lesser DNI state. The obtained results out of the designed system, subjected to low DNI are not found below par, but comparable to some extent with the performance results of such CSP plants at a higher DNI. The analysis indicates that incorporation of the thermal energy storage reduces the levelized cost of energy (LCOE) and augments the plant capacity factor. The capacity factor, the plant efficiency, and the LCOE are found to be 32.50%, 17.56%, and 0.1952 $/kWh, respectively.

Key words： concentrated solar power direct normal irradiance plant performance plant economics thermal energy storage

收稿日期: 2019-05-25 出版日期: 2020-12-21

Corresponding Author(s): Subhadeep BHATTACHARJEE

引用本文:

. [J]. Frontiers in Energy, 2020, 14(4): 850-866.
Rahul BHATTACHARJEE, Subhadeep BHATTACHARJEE. Viability of a concentrated solar power system in a low sun belt prefecture. Front. Energy, 2020, 14(4): 850-866.

链接本文:

https://academic.hep.com.cn/fie/CN/10.1007/s11708-020-0664-5
https://academic.hep.com.cn/fie/CN/Y2020/V14/I4/850

Fig.1

	Parameters	Value		Parameters	Value
Climate date	Site latitude/(°)	23.83	Tower and receiver	Tower height/m	115
	Site longitude/(°)	91.26		Receiver diameter/m	4
	Beam radiation (DNI)/ (kWh·(m²·a) ^–1)	1379.7		Receiver height/m	8
	Temperature/°C	25–36		Number of panels	16
	Average wind speed/(m·s^–1)	2.42		Solar multiplier	2.4
Solar field	Heliostat width/m	6		Maximum receiver flux/(kW_t·m^–2)	1000
	Heliostat width/m	6		Estimated receiver heat loss/(kW_t·m^–2)	30
	Heliostat height/m	6		Receiver flux map resolution	16
	Single heliostat aperture area/m²	36		Number of days in flux map lookup	50
	Heliostat focusing method	Ideal		Hourly frequency in flux map lookup/h	2
	Heliostat canting method	On-axis		Minimum receiver turndown fraction	0.25
	Non solar field land area/acres	2		Maximum receiver operation fraction	1.2
	Solar field land area multiplier	1.2		Receiver startup delay time/h	0.2
	Number of heliostats	3128		Receiver startup delay energy fraction	0.25
	Total land area/acres	94		Required HTF outlet temperature/°C	565
Thermal energy storage (TES)	Full load hours of TES/h	6		Maximum flow rate to receiver/(kg·s^–1)	163.62
	Full load hours of TES/h	6		Receiver design thermal power/MW_t	56
	Storage tank volume/m³	677		Tube outer diameter/mm	25
	Cold tank heater temperature/°C	280		Tube wall thickness/mm	1.25
	Tank heater efficiency	0.99		Coating emittance	0.88
Power cycle	Turbine gross output/MW	10		Coating absorptance	0.94
	Turbine gross output/MW	10		Inlet temperature of the HTF/°C	290
	Estimated net output at design (nameplate)/MW	8.5		Outlet temperature of the HTF/°C	565
	Estimated gross to net conversion factor	0.85		HTF type	Salt 60% NaNO₃40%KNO₃
	Power cycle technology	Rankine cycle	System cost	Site improvement/($·m^–2)	20 [37]
	Boiler operating pressure/bar	100		Site improvement/($·m^–2)	20 [37]
	Boiler inlet pressure control	Fixed pressure		Heliostat field/($·m^–2)	200 [37]
	Condenser type	Air-cooled		Balance of plant/($·kW_e ^–1)	420 [23]
	Design HTF inlet temperature/°C	290		Power block/($·kW_e ^–1)	550 [23]
	Design HTF outlet temperature/°C	565		Storage/($·kW_ht ^–1)	30 [23]
	Cycle thermal efficiency	0.425		Tower cost/$M	12.8
				Receiver cost/$M	13.06
				Land cost/($·acre^–1)	78050

Tab.1

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