Design of biomass power plant integrated with thermochemical heat storage using Ca(OH)2/CaO and evaluation of the flexibility of power generation: Dynamic simulation and energy analysis

2021 ◽  
Vol 243 ◽  
pp. 114366
Author(s):  
Takayuki Uchino ◽  
Takahito Yasui ◽  
Chihiro Fushimi
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Dynamic Simulation ◽  
Energy Analysis ◽  
Heat Storage ◽  
Thermochemical Heat Storage ◽  
Biomass Power Plant

scholarly journals The Development of Straw-Based Biomass Power Generation in Rural Area in Northeast China—An Institutional Analysis Grounded in a Risk Management Perspective

2020 ◽  
Vol 12 (5) ◽  
pp. 1973 ◽  
Author(s):  
Lingling Wang ◽  
Tsunemi Watanabe
Keyword(s):  
Power Generation ◽  
Risk Management ◽  
Power Plant ◽  
Power Plants ◽  
Biomass Energy ◽  
Energy Industry ◽  
Biomass Supply ◽  
Management Perspective ◽  
Biomass Power Plant ◽  
Biomass Power Plants

Given a lack of consideration for the role and importance of stakeholders and the importance of stakeholders in the operation of biomass power plants in China, a comprehensive analysis oriented toward stakeholder risk management is needed to further develop the country’s biomass energy industry. Accordingly, we analyzed institutional factors that contribute to or constrain progress in biomass power generation in China. Data were collected from 275 straw suppliers (farmers) living around a biomass power plant, 15 middlemen, five power plant managers, and five local government officers. Interviews were held with all the participants, but questionnaires were additionally administered to the straw suppliers. Results showed that: (1) risk transfer in the biomass supply chain is one of the reasons why farmers are unwilling to supply straw; (2) middlemen are vital intermediaries between biomass power plant managers and farmers as a middleman-based biomass supply system is necessary to guarantee the quantity of straw supply, and; (3) the institutional structure that underlies the Chinese biomass energy industry is immature.

Heat Storage Performance Analysis of Solar Chimney Power Plant System

2014 ◽  
Vol 472 ◽  
pp. 276-285 ◽  
Author(s):  
Hong Jing Guo ◽  
Jian Lan Li ◽  
Shu Hong Huang
Keyword(s):  
Heat Transfer ◽  
Power Generation ◽  
Power Plant ◽  
Heat Storage ◽  
Storage System ◽  
Solar Chimney ◽  
Unsteady Temperature ◽  
Heat Transfer Theory ◽  
Solar Chimney Power Plant ◽  
Continuous Power

Solar chimney power plant which can realize continuous power generation is a potential power generation technology. Based on the heat transfer theory and hydrodynamics theory, a comprehensive heat transfer and flow model of solar chimney power plant was proposed, and the characteristics of unsteady temperature field and flow field of the system were analyzed. With Manzanares solar chimney power plant as the geometric prototype, the performance of plant generation output and generation stability were studied in condition of different thickness of heat storage layer, different specific heat capacity and thermal conductivity of heat storage medium. The numerical stimulation results showed that above three factors significantly affected the power generation output and generation stability. Thus, the optimization of the three factors was achieved in this paper, which provides the basis for the solar chimney heat storage system design.

scholarly journals A System Dynamics Model to Assess the Effectiveness of Governmental Support Policies for Renewable Electricity

2019 ◽  
Vol 11 (12) ◽  
pp. 3426
Author(s):  
Huilu Yu ◽  
Youning Yan ◽  
Suocheng Dong
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
System Dynamics ◽  
System Dynamics Model ◽  
Renewable Electricity ◽  
Dynamics Model ◽  
Positive Externality ◽  
Support Policy ◽  
The Government ◽  
Biomass Power Plant

China’s support policy for renewable electricity belongs to a feed-in tariffs scheme. With the rapid development of renewable electricity industries, this set of policies brought about a heavy fiscal burden for the government. The exploration of whether current support policy provided excessive subsidies for renewable electricity is of great practical significance. We hold an idea that the internalization of positive externality is the only criterion for the government to support the development of a renewable electricity industry. The problem of whether the current policy provides excessive subsidies for renewable electricity industry can be solved by assessing whether its positive externality is internalized, as renewable electricity industry has a characteristic of externality. Our study object is an assumed biomass power plant in Jingning County, Gansu Province. A system dynamics model was built. Applying the environmental cost accounting method and net present value analysis method, we connected the techno-economic analysis of the biomass power plant with the measurement of positive externality of biomass power generation together. In this system dynamics model, we developed an indicator to reveal whether the subsidies provided by governmental policies can compensate the positive externality generated by the assumed biomass power plant. This study mainly draws the following conclusions: Firstly, China’s current support policy does provide excessive subsidies for the renewable power industry. The subsidies received by biomass power plants from the government are higher than the positive externality generated by them; secondly, the positive externality measurement of the biomass power industry is influenced by many regional factors; thirdly, without governmental policy support, biomass power plants cannot compete with traditional power companies; fourthly, as biomass power generation is concerned, the current price subsidy intensity is about US$0.0132 higher per kWh than a reasonable level. Furthermore, the parameters frequently applied in the calculation of the prices of pollutant emission reduction in Chinese research papers are relatively small, which is only half of their actual values. Jingning County, situated in inland west-northern China, lacks typicality. There is a limitation in judging whether the government’s support policy for renewable electricity is reasonable through a feasibility analysis of investment in a biomass power generation project. This may be the main drawback of this study.

scholarly journals A Game-Theoretic Analysis of Incentive Effects for Agribiomass Power Generation Supply Chain in China

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 546
Author(s):  
Juanjuan Wu ◽  
Jian Zhang ◽  
Weiming Yi ◽  
Hongzhen Cai ◽  
Yang Li ◽  
...  
Keyword(s):  
Power Generation ◽  
Supply Chain ◽  
Power Plant ◽  
Cooperative Game ◽  
Critical Role ◽  
Noncooperative Game ◽  
Optimal Decision ◽  
Maximum Profit ◽  
Government Incentives ◽  
Biomass Power Plant

The undersupplies of feedstock and high costs have hindered the development of China’s biomass power generation. In this paper, the noncooperative game, farmer–broker cooperative game, and broker–biomass power plant cooperative game, under government incentives, are constructed and analyzed. The optimal decision strategies and profits for these three cases are obtained, while numerical examples and sensitivity analysis are conducted, aiming at illustrating some specific features of the games. It is shown that the government plays a critical role in the development of utilizing agribiomass for power generation and can work better in cooperative games. In addition, both agribiomass supply quantity and profits of supply chain members are higher in cooperative than in noncooperative game. Meanwhile, farmers can get the maximum profit in the broker–biomass power plant cooperative game, while biomass power plant makes the maximum profit in the farmer–broker cooperative game. To guide the healthy development of the industry, there is an urgent need for further exploration of the biomass supply chain management and coordination issue. Specifically, the cooperative game for establishing optimal feedstock price subsidy policy will be done by way of adjusting government incentives and alliance profit distribution.

scholarly journals Thermochemical Heat Storage in a Lab-Scale Indirectly Operated CaO/Ca(OH)2 Reactor—Numerical Modeling and Model Validation through Inverse Parameter Estimation

2021 ◽  
Vol 11 (2) ◽  
pp. 682
Author(s):  
Gabriele Seitz ◽  
Farid Mohammadi ◽  
Holger Class
Keyword(s):  
Numerical Model ◽  
Gas Flow ◽  
Reaction Rate ◽  
Heat Storage ◽  
Bulk Material ◽  
Fixed Bed ◽  
Experimental Results ◽  
Fixed Bed Reactor ◽  
Thermochemical Heat Storage ◽  
Speed Up

Calcium oxide/Calcium hydroxide can be utilized as a reaction system for thermochemical heat storage. It features a high storage capacity, is cheap, and does not involve major environmental concerns. Operationally, different fixed-bed reactor concepts can be distinguished; direct reactor are characterized by gas flow through the reactive bulk material, while in indirect reactors, the heat-carrying gas flow is separated from the bulk material. This study puts a focus on the indirectly operated fixed-bed reactor setup. The fluxes of the reaction fluid and the heat-carrying flow are decoupled in order to overcome limitations due to heat conduction in the reactive bulk material. The fixed bed represents a porous medium where Darcy-type flow conditions can be assumed. Here, a numerical model for such a reactor concept is presented, which has been implemented in the software DuMux. An attempt to calibrate and validate it with experimental results from the literature is discussed in detail. This allows for the identification of a deficient insulation of the experimental setup. Accordingly, heat-loss mechanisms are included in the model. However, it can be shown that heat losses alone are not sufficient to explain the experimental results. It is evident that another effect plays a role here. Using Bayesian inference, this effect is identified as the reaction rate decreasing with progressing conversion of reactive material. The calibrated model reveals that more heat is lost over the reactor surface than transported in the heat transfer channel, which causes a considerable speed-up of the discharge reaction. An observed deceleration of the reaction rate at progressed conversion is attributed to the presence of agglomerates of the bulk material in the fixed bed. This retardation is represented phenomenologically by mofifying the reaction kinetics. After the calibration, the model is validated with a second set of experimental results. To speed up the calculations for the calibration, the numerical model is replaced by a surrogate model based on Polynomial Chaos Expansion and Principal Component Analysis.

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