«Subcontract Report Biomass Support for the China NREL/SR-710-40627 Renewable Energy Law: October 2006 Feasibility Report—Agricultural and Forestry ...»
A national laboratory of the U.S. Department of Energy
Office of Energy Efficiency & Renewable Energy
National Renewable Energy Laboratory
Innovation for Our Energy Future
Biomass Support for the China NREL/SR-710-40627
Renewable Energy Law: October 2006
and Forestry Solid Wastes Power
Generation Demonstration December 2005 Center of Renewable Energy Development Beijing, China Energy Research Institute Beijing, China National Development and Reform Commission Beijing, China NREL is operated by Midwest Research Institute ● Battelle Contract No. DE-AC36-99-GO10337 Subcontract Report Biomass Support for the China NREL/SR-710-40627 Renewable Energy Law: October 2006 Feasibility Report—Agricultural and Forestry Solid Wastes Power Generation Demonstration December 2005 Center of Renewable Energy Development Beijing, China Energy Research Institute Beijing, China National Development and Reform Commission Beijing, China NREL Technical Monitor: D. Lew Prepared under Subcontract No. ACO-4-44015-01 National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 • www.nrel.gov Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy by Midwest Research Institute • Battelle Contract No. DE-AC36-99-GO10337
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Printed on paper containing at least 50% wastepaper, including 20% postconsumer waste CONTENTS 1 Rudong Biomass Direct-fired Power Generation Project of Jiangsu
1.1 Project background
1.2 Project introduction
1.3 Straw resource and cost survey
1.3.1 Straw avalablity
1.3.2 Straw charcteristic
1.3.3 Straw cost
1.3 Construction condition
1.3.3 Power grid
1.4 Technology introduction
1.5 Economic assessments
1.6 Finance assessments
1.6.1 Cost estimation
1.6.2 Generation benefits
1.6.3 Profit making ability analysis
1.7 Conclusions and suggestion
2 Gaoyou Biomass Fixed-bed Gasification power generation
2.2 Introduction of owner
2.2.1 Basic information and assets of LinYuan Company
2.2.2 The qualifications to undertake this project
2.3 Options of technical processes
2.4 Targets of project construction
2.5 Technical routes
2.6 Straw collection system
2.6.1 Collection system frame
2.6.2 Collection process
2.6.3 Straw price
2.6.4 Prevention of price risk
2.7 Main technical and economic indicators of system
2.7.1 Technical indicators
2.8 Economic analyses
2.8.1 Basic data
2.8.2 Equipment and construction
2.8.3 Investment for Straw process sites and operations
2.8.4 Investment in fixed assets
2.8.5 Scheme of investment
2.8.6 Operation cost and profits
2.8.8 Analysis on cash flow
2.8.9 Sensitive analysis
iii 3 Xinhua biomass fliuldized bed gasification generation power
3.1 Project description
3.1.1 Project introduction
3.1.2 Project owner
3.1.3 General description of project location
3.2. Technical Process
3.2.1 Technical flow
3.2.2 Gasification power system
3.2.3 Device equipping Plan
3.3 Feedstock collection system
3.3.1 Rice husk
3.4 Project construction
3.4.1 Site selection
3.5 Environmental impact analysis
3.6 Investment estimation and financing resources
3.6.1 Investment estimation
3.7 Fiscal analysis
3.7.1 Basic data
3.7.2 Operation cost
3.7.3 Fiscal assessment
3.7.4 Sensitivity analysis
3.7.5 Analysis of investment benefits
iv Feasibility Research Report on the Agricultural and Forestry Solid Wastes Power Generation Demonstration Project 1 Rudong Biomass Direct-fired Power Generation Project of Jiangsu
1.1 Project background Rudong County of Jiangsu province locates in the Eastern China region along the eastern coastline, which is the downstream plain of Yangtze River. The total area of the county is 1873 km2, among which the arable land is around 1.58 million Mu. The annual agriculture yield is over 900,000 Ton, with stalk productions of 790,000 ton. This area basically depends on agriculture. Meanwhile, the industries grow very fast. Rudong enjoys plenty of stalk resources, and its utilization will positively contribute to the energy consumption in Jiangsu province, which is significant to improve the economic and social development.
Currently, the stalk is basically used for cooking (roughly 30%-40%), with direct combustion. The utilization efficiency is only 5-8%. On the hand, there are substantial stalks that are burned directly inside the plowing field, which may influence the transportation, and even airport regulation. It wastes the precious energy resources, as well as seriously pollutes the environment. Stalk generation could not only address the fuel and electricity supply deficiency issue, but also replace the fossil fuel, so as to deploy the energy resources in a more reasonable approach.
1.2 Project introduction Rudong stalk generation project is one of the important components of the new energy base construction in Rudong County. The total capacity is 24MW, with electricity generation of 156Gwh, 133Gwh of which is connected to the grid. In line with the National Renewable Energy utilization target, this project aims to import the oversea mature stalk generation technology and devices through international cooperation, so as to absorb and achieve the commercialization and scaling up of the stalk generation.
Rudong stalk generation project is located in the middle of Rudong project in Jiangsu province. It enjoys nice construction condition. This project could provide clean and reliable energy to the local economy development, and contribute to the local power grid. It could also replace the small steam coal-fired power plants whose development has been strictly controlled by the government, so as to reduce the coal consumption for power generation, which will be beneficial to the local environment and ecology protection. It is consistent with the government’s sustainable energy strategy.
1.3 Straw resource and cost survey 1.3.1 Straw availablity Through the spot survey of rural resident about 1000 household in Rudong, the output of straw for purchasing is about 7130 thousand tons (showns in Table1-3-1). Furthermore, the density of straw resource is high, and the production of straw is not effected on the climate. In 25km radius, the output of straw for purchasing is about 7600 thousand tons, which can fully supply the project.
1.3.2 Straw charcteristic The four swatches, which are cotton, wheat, rice and rapeseed in six months, are delivered to test in Spain. Table1-3-3 lists the straw component and charcteristic.
Based on Table1-3-4, the average price is 97.5 Yuan/t. If the straw is collected in large scale, the price of straw will increase. Furthermore, because the purchase amount is large, the project need set up about 10 collecting site, which will increase the collecting cost. Therefore, the collecting cost in practice is about 200Yuan/tons (the cotent of water is below 11%).
188.8.131.52 Handling cost The straw for the project need be handled by machine. The denisity of each bale is 1t/m3 and the weight is 340-380kg. Based survey and evaluation, the handling cost is about 30Yuan/ton.
184.108.40.206 Transporting cost In 15km, the transporting cost of straw is about 25Yuan/ton. Beyond 15km, the cost will reach 50Yuan/tons.
In conclusion, the total cost of straw is 280Yuan/ton
1.3 Construction condition 1.3.1 Resource Rudong is within the JiangHai plain, and occupies abundant stalk resources. The arable land is 1.58 million Mu with 900,000 ton agricultural production. Taking into consideration of the mulberry and weed, the annual stalk production is accumulated to 1.11 million ton. Within 25km, the stalk production is
1.237 million ton, 0.76 million of which could be commercialized.
A sample survey within 1000 households in Rudong County indicated 713,000 ton of stalk could be commercialized given the price is within the scope of the farmers’ anticipation. Since the stalk resource density is high, and seldom influenced by the climate, a commercial 760,000 ton can absolutely meet the requirements of this project when considering a 25km collection radius and a high commercial awareness from the farmers.
1.3.2 Transportation The dense roads and rivers note the Rudong County. The possession proportion of agriculture vehicles is quite high. Villages are connected by road. Groups are reachable by any vehicles. This means a sound condition for stalk transportation. There are three candidates location for this project, which is all
1.3.3 Power grid Rudong County power grid is the end of the JiangSu provincial power grid. The basic power plants are the nearby NanTong Power plant (1.4 GW), TianShengGang plant (550MW). There are 2*220KV, 6*110KV and 10*35KV substations. The power supply grid is based on the MaTang Substation of 220KV, with the main 110KV substation and 110KV transmission lines, and supplemented by the 35KV substations and 35KV transmission lines. The three candidate sites are all close to the 220KV MaTang substation, and are quite easy to connect to the grid.
1.4 Technology introduction The stalk resources come from the local farmers or the feedstock trader. In sequence with the collection, package, and transportation through rivers or vehicles to the factory storage, there comes to
the following steps:
Stalk transported from conveyor and shredder to the boiler Steam that produced from stalk combustion propels the steam turbines and generates electricity. The un-combusted stalk will stay at the bottom of the boiler. Meanwhile the ash enters the smoke filer chamber and emit through the chimney.
The residues inside the boiler and the ash could be harnessed as the agricultural fertilizer.
A detailed technique flow can be as following:
1.5 Economic assessments This project is composed by the storage, boiler chamber, turbine etc. It occupies 101,000 m2. The gross investment is 333 million RMB. After two years construction period, the power capacity could reach 24MW, and annually consumes stalk 140,000 ton. The annual operation hours is 6500, and thus produces 156 GWh and sale 132.6 GWh to the grid. The annual sale value could reach 106 million RMB.
Around 150 employments could be created.
The investment category is: 30% from capital cost, 67% from commercial bank loan, and another 20 million US$ is needed to import the key devices.
The bank loan period started from 21th Feb 2004 with the interest rate of 5.76%, and 15 years payback period. In addition to that, the flow capital during the first year was 15 million RMB, among which 5 million is self-capital, and 10 million comes from the flow capital bank loan.
Power generation capacity: 24MW;
Annual electricity output: 156 GWh;
On-grid electricity: 132.6 GWh;
Construction period: 2 years
The finance assessment work is as per the requirements of “Economy assessment approach and parameters for the construction project”, which is jointly issued by the National Development and Planning Commission, and Ministry of Construction, and carried out in line with the current finance and
The calculation period assumed 20 years, 2 construction years, and 18 operation years.
1.6.1 Cost estimation The generation cost includes: depreciation, O&M, salary and welfare, other cost and interest cost
The integrated depreciation rate: 6.67%; O&M rate: 1.0%; Staff number: 150; average salary:
20,000 RMB/a The annual gross cost and operation cost is calculated to 78.86 million RMB (first year after operation) and 45.16 million RMB respectively.
1.6.2 Generation benefits 220.127.116.11 Grid connection price The IRR is generally accepted as 12-15% by the similar foreigner project developer. Combined with the domestic situation, the IRR is taken as 12% for this project. Taking into account of the favorable policies for the grid-connected power plants, the grid-connected electricity price during operation period with and without VAT is 0.731 RMB/kWh and 0.806 RMB/kWh respectively.
18.104.22.168 Sale revenue, tax and profit Sale revenue The grid-connected electricity: 132.6 kWh; grid-connected electricity tariff: 0.806 RMB/kWh; sale revenue: 106.88 million RMB.
The tax levied for the power projects include: VAT, sale surtax, income tax.
VAT: 17%, exclusive of the price;
Sale surtax: inclusive of urban construction tax and education tax, 7% and 3% respectively;