scholarly journals Biogas Technology as an “Engine” for Facilitating Circular Bio-Economy in Denmark—The Case of Lolland & Falster Municipalities Within Region Zealand

2021 ◽  
Vol 9 ◽  
Author(s):  
Rikke Lybæk ◽  
Tyge Kjær
Keyword(s):  
Crop Residues ◽  
Biogas Production ◽  
Regional Climate ◽  
Energy System ◽  
Animal Manure ◽  
Gas Network ◽  
Biomass Resources ◽  
Integrated Energy System ◽  
Decentralized Energy ◽  
Biogas Technology

This article investigates how biogas technology can facilitate the deployment of municipal circular bio-economic solutions within the energy and agrarian sectors in Denmark. The emphasis is on the regional climate policy and the existing biogas technology concepts, within a decentralized energy market located in the Southern part of Zealand. The case analysis will identify how such technology can be utilized as a lever for future “extraction-activities,” as for example protein, wax, and furfural substrates. Within Falster & Lolland Municipalities, it is identified that 800.000 tons of animal manure is readily available for biogas production, just as 880.000 tons and 220.000 tons of unused beet tops and residual cereal straw could be feed to biogas facilities as for example co-silage materials. With a potential gas yield of approximately 897.000 MWh, composed by the crop residues alone, the challenge is how to utilize such resources the most efficient when addressing future needs for bio-products and high value materials and energy. Through the lens of Circular Bio-Economy this article addresses three themes, by which biogas technology can become an “engine” for future bioenergy solutions, where cascading activities and use of side-streams are developed: 1) production of biogas by means of local agricultural residues (beet tops, residual straw, and animal manure), combined with 2) “extraction-activities” as furfural and wax from straw, as well as protein from beet tops. Besides this 3) opportunities for upgrading the biogas and distributing it on a natural gas network, hereby enlarging the supply market for energy services from the biogas plant and facilitating the development of a more “integrated energy system,” currently being promoted by the European Commission. This article concludes on a step-by-step approach to utilize biomass residues more efficiently in light of the CBE concept and cascading approach, and the available biomass resources within the specific case area addressed.

Security region of natural gas network in electricity-gas integrated energy system

2020 ◽  
Vol 117 ◽  
pp. 105601 ◽  
Author(s):  
Xue Li ◽  
Guoda Tian ◽  
Qingxin Shi ◽  
Tao Jiang ◽  
Fangxing Li ◽  
...  
Keyword(s):  
Natural Gas ◽  
Energy System ◽  
Gas Network ◽  
Natural Gas Network ◽  
Integrated Energy System ◽  
Security Region

Operation optimization of regional integrated energy system based on the modeling of electricity-thermal-natural gas network

2019 ◽  
Vol 251 ◽  
pp. 113410 ◽  
Author(s):  
Yongli Wang ◽  
Yudong Wang ◽  
Yujing Huang ◽  
Jiale Yang ◽  
Yuze Ma ◽  
...  
Keyword(s):  
Natural Gas ◽  
Energy System ◽  
Operation Optimization ◽  
Gas Network ◽  
Natural Gas Network ◽  
Integrated Energy System

scholarly journals Study of The Amount of Produced Animal Manure and Biogas Potential in a 5, 20 and 40 km Zone around Debrecen

2006 ◽  
pp. 64-68
Author(s):  
János Szendrei ◽  
Gábor Grasseli
Keyword(s):  
Energy Supply ◽  
Biogas Production ◽  
Animal Manure ◽  
Local Market ◽  
Guiding Principle ◽  
Agricultural Census ◽  
Biogas Plants ◽  
Decentralized Energy ◽  
Year 2000 ◽  
Supply Systems

The guiding principle for our research is that decentralized energy supply systems should be located near local consumers. One big, local market for energy from biogas plants in Hajdú-Bihar county is Debrecen. In the course of the investigation of biomass suitable for biogas production in the area of Debrecen, this study determines the quantity of biogas producible from animal manure. Municipalities around Debrecen were examined in circles with 40, 20 and 5 km radius. Livestock data of these settlements stem from the Agricultural Census in year 2000, actualized by the county trend of livestock changes. Manure quantity and biogas potential in these places are estimated with coefficients from the literature and our calculations. In the largest circle, about 1.4 million tons of manure is produced, from which round 94 million m3 biogas can be produced. Biomass produced in the settlements and producible biogas shows a remarkable trend of concentration, which supports our recommendation on the system of energy supply.

scholarly journals Optimizing operation of integrated energy system considering distribution network and natural gas network

2019 ◽  
Vol 1303 ◽  
pp. 012084 ◽  
Author(s):  
Juqin Xuan ◽  
Jieyun Zheng ◽  
Pengjia Shi ◽  
Jueying Wang ◽  
Shiwei Xie ◽  
...  
Keyword(s):  
Natural Gas ◽  
Distribution Network ◽  
Energy System ◽  
Gas Network ◽  
Natural Gas Network ◽  
Integrated Energy System

scholarly journals An integrated multi-energy flow calculation method for electricity-gas-thermal integrated energy systems

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Mengting Zhu ◽  
Chengsi Xu ◽  
Shufeng Dong ◽  
Kunjie Tang ◽  
Chenghong Gu
Keyword(s):  
Calculation Method ◽  
Energy Flow ◽  
Energy System ◽  
Calculation Model ◽  
Flow Calculation ◽  
Gas Network ◽  
Integrated Energy Systems ◽  
Unit Value ◽  
Integrated Energy System ◽  
Simplified Calculation

AbstractThe modeling and multi-energy flow calculation of an integrated energy system (IES) are the bases of its operation and planning. This paper establishes the models of various energy sub-systems and the coupling equipment for an electricity-gas-thermal IES, and an integrated multi-energy flow calculation model of the IES is constructed. A simplified calculation method for the compressor model in a natural gas network, one which is not included in a loop and works in constant compression ratio mode, is also proposed based on the concept of model reduction. In addition, a numerical conversion method for dealing with the conflict between nominal value and per unit value in the multi-energy flow calculation of IES is described. A case study is given to verify the correctness and speed of the proposed method, and the electricity-gas-thermal coupling interaction characteristics among sub-systems are studied.

scholarly journals Assessment of Selected Biomass Energy Potential in Afghanistan

2019 ◽  
Vol 4 (6) ◽  
pp. 6-14
Author(s):  
Abdul Ghani Noori ◽  
P. Abdul Salam ◽  
Agha Mohammad Fazli
Keyword(s):  
Crop Residues ◽  
Sustainable Use ◽  
Animal Manure ◽  
Primary Energy ◽  
Biomass Energy ◽  
Total Biomass ◽  
Energy Potential ◽  
Energy Needs ◽  
Biomass Resources ◽  
Development Plans

Biomass plays a major role in satisfying the energy needs of Afghanistan, especially in the residential sector where fuel demand is primarily met in the form of fuelwood, charcoal, crop residues and animal manure. Till now, enough work has not been undertaken to assess the biomass energy potential in the country to support renewable energy development plans and more sustainable use of biomass resources. This paper is limited to the assessment of biomass energy potential from the following resources: (A) forest fuelwood and charcoal, (B) crop residues (wheat, rice, barley and maize residues) and (C) cattle manure for the years 2012-13 and 2013-14. The study assesses a total biomass energy potential of 97,310 TJ during the period 2012-13 and 99,012 TJ during the period 2013-14. It is observed that only about 52% of the estimated biomass energy potential is being exploited. The estimated energy potential of the selected biomass could contribute up to 69% in the primary energy consumption of Afghanistan (140,966 TJ) during the year 2012-13. 

Evaluation of net shortwave radiation over China with a regional climate model

2020 ◽  
Vol 80 (2) ◽  
pp. 147-163
Author(s):  
X Liu ◽  
Y Kang ◽  
Q Liu ◽  
Z Guo ◽  
Y Chen ◽  
...  
Keyword(s):  
Regional Climate Model ◽  
Climate Model ◽  
Regional Climate ◽  
Radiant Energy ◽  
Energy System ◽  
Radiation Budget ◽  
Shortwave Radiation ◽  
Monsoon Region ◽  
Clear Sky ◽  
Sky Conditions

The regional climate model RegCM version 4.6, developed by the European Centre for Medium-Range Weather Forecasts Reanalysis, was used to simulate the radiation budget over China. Clouds and the Earth’s Radiant Energy System (CERES) satellite data were utilized to evaluate the simulation results based on 4 radiative components: net shortwave (NSW) radiation at the surface of the earth and top of the atmosphere (TOA) under all-sky and clear-sky conditions. The performance of the model for low-value areas of NSW was superior to that for high-value areas. NSW at the surface and TOA under all-sky conditions was significantly underestimated; the spatial distribution of the bias was negative in the north and positive in the south, bounded by 25°N for the annual and seasonal averaged difference maps. Compared with the all-sky condition, the simulation effect under clear-sky conditions was significantly better, which indicates that the cloud fraction is the key factor affecting the accuracy of the simulation. In particular, the bias of the TOA NSW under the clear-sky condition was <±10 W m-2 in the eastern areas. The performance of the model was better over the eastern monsoon region in winter and autumn for surface NSW under clear-sky conditions, which may be related to different levels of air pollution during each season. Among the 3 areas, the regional average biases overall were largest (negative) over the Qinghai-Tibet alpine region and smallest over the eastern monsoon region.

Sign in / Sign up

Export Citation Format

Share Document