Thermodynamic analysis of a hybrid wind turbine and biomass gasifier for energy supply in a rural off-grid region of Nigeria

Diyoke, Chidiebere; Ngwaka, Ugochukwu

doi:10.1080/15567036.2021.1922551

Cited by 6 publications

(4 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Graphical dependence (12) at different values of q is shown in Figure 1a. From (12), it is easy to find the optimal ratio of forces from the point of view of thermodynamic efficiency:…”

Section: A Universal Methods Of Describing and Evaluating Performance...mentioning

confidence: 99%

“…Also, Figure 15d shows the maximum possible efficiency dependencies on the angular velocity η Σ,max (ω) of the complex at the studied wind speeds. They are calculated according to Expression (12) for the maximum values of the degree of coupling q Σ.max (ω) and the optimal values of the reduced force ratios (Zχ) Σ.opt (ω) of the complex, corresponding to the optimal operating modes of the complex EC with optimal connection coefficients γ opt (ω). As can be seen from the obtained dependences, the optimal combination of two components of the EC (VAWT and PMSG) provides a significant efficiency increase, especially at low wind speeds.…”

Section: Thermodynamic Parameters Of the Wecs As A Cascade Ecmentioning

confidence: 99%

See 1 more Smart Citation

A Non-Equilibrium Thermodynamic Approach for Analysis of Power Conversion Efficiency in the Wind Energy System

2023

View full text Add to dashboard Cite

This article proposes an approach and develops an appropriate method of applying linear non-equilibrium thermodynamics to analyze energy processes, in particular using the example of the wind energy conversion system (WECS) with a directly connected vertical axis wind turbine (VAWT) and vector-controlled permanent magnet synchronous generator (PMSG). The main steps of the proposed approach are the description of the component subsystems as universal linear or linearized energy converters (ECs), which are characterized by several dimensionless parameters, the main one of which is the degree of coupling between their input and output. According to their value, as well as justified efficiency criteria, the optimal operating points of each ECs can be easily found. Such an approach makes it possible to abstract from physical laws of a different nature and equally assess the work of each of the subsystems. The next step is a connection of the received ECs. As shown in the paper, for the most common cascade connection of ECs, there are the best conditions for their connection, under which the newly formed equivalent EC can have maximum efficiency. This opens up an opportunity to analyze the influence of already real parameters of cascaded interconnected subsystems on the quality of their connection and justify specific solutions that would not have been seen without this approach. For example, in this study, from all parameters of the PMSG, only the selection of the optimal rated inductance of the armature winding made it possible to improve the quality of the connection of the PMSG with a specific VAWT and approximate the efficiency of the entire WECS to the maximum possible, especially in medium and high winds.

show abstract

“…Graphical dependence (12) at different values of q is shown in Figure 1a. From (12), it is easy to find the optimal ratio of forces from the point of view of thermodynamic efficiency:…”

Section: A Universal Methods Of Describing and Evaluating Performance...mentioning

confidence: 99%

Section: Thermodynamic Parameters Of the Wecs As A Cascade Ecmentioning

confidence: 99%

A Non-Equilibrium Thermodynamic Approach for Analysis of Power Conversion Efficiency in the Wind Energy System

2023

View full text Add to dashboard Cite

show abstract

“…The country is projected to require more than 65 GW of new power-generating capacity to meet unsatisfied demand [4]. Although Nigeria has enough renewable energy (RE) sources, the country currently relies mostly on using conventional and pollution-prone fossil-based power systems to meet the Nation's energy needs [6].…”

Section: Introductionmentioning

confidence: 99%

A comprehensive analysis on the grid-tied solar photovoltaics for clean energy mix and supply in Nigeria’s on-grid power

Diyoke

Ngwaka

UGWU

2023

Journal of Energy Systems

Self Cite

View full text Add to dashboard Cite

Nigeria’s power infrastructure is dominated by polluting grid-connected fossil-based power systems. The Nation currently suffers from an acute electricity shortage, making nearly 40% of on-grid customers receive unreliable and inconsistent power below their demand. Solar resources are widespread in the country at considerably good potential than in many European nations. Nevertheless, Nigeria's solar photovoltaic (PV) installation capacity could be better. This paper presents the techno-economic, environmental and risk analysis of a grid-connected 10 kW, 100 kW, and 1 MW PV system for three customer segments in Abuja, Nigeria. It is found that a 1 MW grid-tied PV system is very viable at an electricity export rate not below 0.01 $/kWh and a total initial cost (TIC) of not more than 2000 $/kW for fixed axis system and 2600 $/kWh or lower for the two-axis system. The 10 kW and 100 kW PV systems are only financially viable with fiscal incentives. However, they become profitable with a minimum feed-in tariff of about 0.294, 0.297, 0.223 and 0.214 $/kWh for the fixed 10 kW, 2-axis 10 kW, fixed 100 kW and two-axis 100 kW systems, respectively.

show abstract

“…Multigeneration production systems can be used in various industries, such as freshwater production [16]. Diyoke and Ngwaka [19], integrated a gasifier, a syngas electric motor, connected to an absorption refrigeration system, and a wind turbine generator. They observed that the overall energy efficiency and exergy efficiency were 0.48 and 0.25, respectively, and major exergy destruction of about 95% for this system in this system, wastes are first collected and separated, and then sent to processes for energy production [20].…”

Section: Introductionmentioning

confidence: 99%

Energy, Exergy, Exergoeconomic, and Exergoenvironmental Study of an Innovative Solar-Wind-Biomass Driven Polygeneration System for Power, Heat and Ammonia Production

Blanco Marigorta,

Khoshgoftar Manesh,

Davadgaran

et al. 2023

36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 20

View full text Add to dashboard Cite

Global warming has increased the use of renewable energy in energy systems. In this regard, the present work presents an innovative polygeneration system to produce power, ammonia, and process steam using solar, biomass, wind, and geothermal energies. By using a solar-syngas hybrid boiler, steam has been created in two high-pressure (HP) and low-pressure (LP) levels, and the HP steam is used for the gasification process. Syngas produced from biomass gasification process produces ammonia with the nitrogen obtained from an air separation unit by going through water gas shifting and carbon capture processes. Power consumption in the mentioned sections is produced by wind turbines. A Brayton cycle with ammonia and hydrogen hybrid fuel has been used to produce power and heat. The integration of supercritical CO2 and organic Rankine cycles with the hot flue gas output from the Brayton cycle has reduced heat losses and increased power generation. The presented renewable system has been analysed from the point of view of energy, exergy, exergeoeconomic, and exergoenvironmental (4E) methods. The overall results indicate that the total energy and exergy efficiencies are 31.33% and 38.53%, respectively. Also, the cost rate and environmental impacts of the whole system are calculated as 3222.35 $/h and 53.16 Pts/h, respectively. Meanwhile, the levelized cost and environmental impacts of electricity are equal to 0.18 $/kWh and 0.003 Pts/kWh, and the presented system is capable of producing 297.86 ton/day of ammonia.

show abstract

Thermodynamic analysis of a hybrid wind turbine and biomass gasifier for energy supply in a rural off-grid region of Nigeria

Cited by 6 publications

References 35 publications

A Non-Equilibrium Thermodynamic Approach for Analysis of Power Conversion Efficiency in the Wind Energy System

A Non-Equilibrium Thermodynamic Approach for Analysis of Power Conversion Efficiency in the Wind Energy System

A comprehensive analysis on the grid-tied solar photovoltaics for clean energy mix and supply in Nigeria’s on-grid power

Energy, Exergy, Exergoeconomic, and Exergoenvironmental Study of an Innovative Solar-Wind-Biomass Driven Polygeneration System for Power, Heat and Ammonia Production

Contact Info

Product

Resources

About