Design, dynamic analysis and control-based exergetic optimization for solar-driven Kalina power plant

Babaelahi, Mojtaba; Mofidipour, Ehsan; Rafat, Ehsan

doi:10.1016/j.energy.2019.115977

Cited by 23 publications

(3 citation statements)

References 16 publications

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“…According to gas company reports, about 15% of the energy is wasted in the industry. 31 Therefore, people training who work as operators on the machines is the first step in optimizing energy consumption. This is because poor energy-consciousness of the operator results in a massive waste of energy.…”

Section: Scenarios and Policy Assessmentmentioning

confidence: 99%

Efficacy of energy consumption policy in Iranian National Gas Company: System dynamics approach

Alikhani

Vahdat

Owlia

2021

Energy & Environment

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The ever-increasing global demand for energy, oil production/supply and the necessity for alternative approaches regarding energy harvesting have opened a deeper horizon for natural gas utilization. The complexity of the demand–supply match of natural gas and the lack of an optimal pattern of energy consumption have been daunting tasks for the energy decision-makers in the last century. Although laws regarding energy efficiency are formulated and even implemented in some cases, there was no benchmarking analysis which takes all useful indexes into account until recently. However, in this article, by identifying the factors affecting the pattern of gas consumption through the system dynamic approach, regulations associated with productivity are assessed. For this, a regional dynamic integrated gas model is developed. The model effectiveness in handling the system dynamism and various scenarios are investigated through a real case study in Yazd—a central province of Iran—to ascertain the proposed approach. The results show that the developed targeted subsidy law is effective in the household sector. Despite the fact that the thorough implementation of the energy efficiency regulations has positive environmental and economic impacts, these regulations have not been fully implemented in many cases and do not have the required efficiency in the industry sector.

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Section: Scenarios and Policy Assessmentmentioning

confidence: 99%

Efficacy of energy consumption policy in Iranian National Gas Company: System dynamics approach

Alikhani

Vahdat

Owlia

2021

Energy & Environment

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“…The results showed that the new model (KCS) leads to a 15.8% rise in net power output and a 4.13% drop in thermal efficiency. Babaelahi et al [18] found that the high efficiency and less settling time net power is a big problem in design and optimize the power producing structures. This work is designed to find a good method to design and optimize the linear parabolic solar collector to power Kalina cycle power plant.…”

Section: Introductionmentioning

confidence: 99%

Effect of Operating Conditions on Modified Kalina Cycle Performance

Nassir¹,

Shahad²

2022

IJHT

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Simple Kalina cycle system (SKCS) is used for low temperature, intermediate temperature and high temperature heat recoveries. However, its efficiency is rather low. Therefore, a modification is suggested to improve its efficiency. In this work a computer program is developed to predict the energy-exergy performance of a modified Kalina Cycle System (MKCS) using aqua ammonia solution. It consists of heat recovery vapor generator (HRVG), condenser, heat exchanger, separator, turbine, throttling valve, absorber and pump. The modification is implemented by introducing a heat exchanger (HE) between the separator and expansion valve. This HE is used to reheat the work solution which comes from the pump by the high temperature hot weak solution which comes from the separator. The effect of many operating conditions such as dryness fraction (DF) at separator inlet, low pressure and ammonia (NH3) mass fraction with constant high pressure on cycle performance is studied. The results show that the modified cycle efficiency is higher than the simple cycle efficiency by about 33.6% while the net power by about 27.8%. The highest efficiency and highest net output power are 14.7% and 0.5641 kW respectively. The exergy efficiencies for modified Kalina and simple Kalina are 24.8% and 11.7% respectively.

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“…All the studies mentioned above were considered the thermodynamic or economic performances of power plants. However, other features of renewable-based power plants could cause a radical change in these systems' performance [13]. The dynamic behavior of these systems is of the utmost importance due to several reasons.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis, Advanced Non-Linear Dynamic Simulation and Multi-Criteria Optimization of a 100 MW Parabolic Trough Solar Steam Power Plant

Mofidipour

Babaelahi

Arabkoohsar

2021

International Journal of Thermodynamics

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Thermodynamic analyses of concentrating solar power plants and optimizing these cycles relying on the energetic and exergetic optimal efficiencies are quite common. However, it is found that just considering the efficiency of the system for performance optimization and neglecting the adverse effects of the plant's wrong operation timings, which is a function of the solar working fluid flow rate, can easily give misleading optimization results. This study's primary goal is to find the optimal operating point of the cycle in terms of the thermodynamic efficiencies considering the system's operating time. Thus, the Sliding Mode Control (SMC) approach is employed to provide a proper mass flow rate for the working fluid from the solar collector field to achieve a precise output temperature from the collectors in different operating conditions. Multi-objective optimization is performed using the Particle Swarm Optimization (PSO) algorithm. The results of power block sensitivity analysis indicate that a 70℃ increase in the solar collector outlet temperature remarkably enhances electricity generation and exergetic efficiency by 67 and 48%. The two-objective optimization shows 22.01%, 2.10%, and 5.46% enhancement in response time, thermal efficiency, and exergetic efficiency, and the three-objective optimization reveals 3.68% and 3.74% improvement in efficiency (thermal and exergetic), respectively.

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Design, dynamic analysis and control-based exergetic optimization for solar-driven Kalina power plant

Cited by 23 publications

References 16 publications

Efficacy of energy consumption policy in Iranian National Gas Company: System dynamics approach

Efficacy of energy consumption policy in Iranian National Gas Company: System dynamics approach

Effect of Operating Conditions on Modified Kalina Cycle Performance

Thermodynamic Analysis, Advanced Non-Linear Dynamic Simulation and Multi-Criteria Optimization of a 100 MW Parabolic Trough Solar Steam Power Plant

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