Parametric analysis and yearly performance of a trigeneration system driven by solar‐dish collectors

Bellos, Evangelos; Pavlović, Saša; Stefanović, Velimir; Tzivanidis, Christos; Nakomcic‐Smaradgakis, Branka B.

doi:10.1002/er.4380

Cited by 55 publications

(76 citation statements)

References 28 publications

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“…For the solar energy radiation absorbed by an HSR in Equation 13, the following equation can be used [40]:…”

Section: No Component Mass Balance Energy Balancementioning

confidence: 99%

“…In which, ZF defines the cash flow of a system per year. For the cash flow of both systems per year following equation can be used [40,65]:…”

Section: W Andmentioning

confidence: 99%

“…In which, the r is the factor of discount considered as 3% in this study [40,65]. The internal rate of return (IRR) for a system is given as [40,65]:…”

Section: W Andmentioning

confidence: 99%

“…Here, N defines the lifetime of a system that is 20 years in this study. Additionally, the net present value (NPV) of a system can be formulated as follows [40,65]:…”

Section: W Andmentioning

confidence: 99%

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Investigation the Integration of Heliostat Solar Receiver to Gas and Combined Cycles by Energy, Exergy, and Economic Point of Views

et al. 2020

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Due to the high amount of natural gas resources in Iran, the gas cycle as one of the main important power production system is used to produce electricity. The gas cycle has some disadvantages such as power consumption of air compressors, which is a major part of gas turbine electrical production and a considerable reduction in electrical power production by increasing the environment temperature due to a reduction in air density and constant volumetric airflow through a gas cycle. To overcome these weaknesses, several methods are applied such as cooling the inlet air of the system by different methods and integration heat recovery steam generator (HRSG) with the gas cycle. In this paper, using a heliostat solar receiver (HSR) in gas and combined cycles are investigated by energy, exergy, and economic analyses in Tehran city. The heliostat solar receiver is used to heat the pressurized exhaust air from the air compressor in gas and combined cycles. The key parameter of the three mentioned analyses was calculated and compared by writing computer code in MATLAB software. Results showed the use of HSR in gas and combined cycles increase the annual average energy efficiency from 28.4% and 48.5% to 44% and 76.5%, respectively. Additionally, for exergy efficiency, these increases are from 29.2% and 49.8% to 45.2% and 78.5%, respectively. However, from an economic point of view, adding the HRSG increases the payback period (PP) and it decreases the net present value (NPV) and internal rate of return (IRR).

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“…For the solar energy radiation absorbed by an HSR in Equation 13, the following equation can be used [40]:…”

Section: No Component Mass Balance Energy Balancementioning

confidence: 99%

“…In which, ZF defines the cash flow of a system per year. For the cash flow of both systems per year following equation can be used [40,65]:…”

Section: W Andmentioning

confidence: 99%

“…In which, the r is the factor of discount considered as 3% in this study [40,65]. The internal rate of return (IRR) for a system is given as [40,65]:…”

Section: W Andmentioning

confidence: 99%

“…Here, N defines the lifetime of a system that is 20 years in this study. Additionally, the net present value (NPV) of a system can be formulated as follows [40,65]:…”

Section: W Andmentioning

confidence: 99%

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Investigation the Integration of Heliostat Solar Receiver to Gas and Combined Cycles by Energy, Exergy, and Economic Point of Views

et al. 2020

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“…photovoltaic panels [PV], solar thermal collectors [ST], hybrid photovoltaic/thermal, wind turbines [WT], among others) providing higher flexibility and diversification as well as environmental benefits, also play a key role in the design of sustainable energy supply systems for residential buildings. [14][15][16] They can cover multiple energy demands directly (e.g. electricity from PV or WT, or heat from ST) or indirectly by coupling absorption and/or mechanical HP.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the design of polygeneration systems for the residential sector under different self‐consumption regulations

2020

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Polygeneration systems enable natural resources to be exploited efficiently, decreasing CO 2 emissions and achieving economic savings relative to the conventional separate production. However, their economic feasibility depends on the legal framework. Preliminary design of polygeneration systems for the residential sector based on the last Spanish self-consumption regulations RD 900/2015 and RD 244/2019 was carried out in Zaragoza, Spain. Both regulations were applied to individual and collective installations. Several technologies, appropriate for the energy supply to residential buildings, for example, photovoltaics, wind turbines, solar thermal collectors, microcogeneration engines, heat pump, gas boiler, absorption chiller, and thermal and electric energy storage were considered candidate technologies for the polygeneration system. A mixed integer linear programming model was developed to minimize the total annual cost of polygeneration systems. Scenarios with and without electricity sale were considered. CO 2 emissions were also calculated to estimate the environmental impact. Results show that RD 900/2015 discourages the investment in self-consumption systems whereas the RD 244/2019 encourages them, especially in renewable energy technologies. Moreover, in economic terms, it is more profitable to invest in collective self-consumption installations over individual installations. However, this does not necessarily represent a significant reduction of CO 2 emissions with respect to individual installations since the natural gas consumption tends to increase as its unit price decreases because of the increase of its consumption level. Thus, more appropriate pricing of natural gas in residential sector, in which its cost would not be reduced when increasing its consumption, would be required to achieve significant CO 2 emissions reduction. In all cases, the photovoltaic panels (PV) are competitive and profitable without subsidies in self-consumption schemes and the reversible heat pump (HP) played an important role for the CO 2 emissions reduction. In a horizon to achieve zero CO 2 emissions, the net metering scheme could be an interesting and profitable alternative to be considered.

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Energy, Exergy, Economic, Exergoeconomic, and Exergoenvironmental (5E) Analyses and Optimization of a Novel Three‐Stage Cascade System Based on Liquefied Natural Gas Cold Energy

Shang

Pan

et al. 2022

Energy Tech

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Energy conservation and emission reduction are inevitable strategies for alleviating energy shortages and environmental pollution, which can be achieved by improving the energy utilization efficiency and using cleaner energy. Waste heat recovery (WHR) is an effective strategy to improve the energy utilization efficiency of a system. [1] A common WHR approach involves the addition of a bottoming cycle, [2] such as the Rankine (RC), flash, Kalina (KC), Stirling, and Brayton cycles, with each bottoming cycle exhibiting a different WHR potential for various temperature ranges. In this regard, waste heat is typically categorized into low-(<230 °C), medium-(230-650 °C), and high-temperature residual heat (>650 °C). [3] Varma et al. [4] performed a comparative study of the performance of the organic Rankine cycle (ORC), organic flash cycle (OFC), and KC for recovering low-grade waste heat and found that the OFC, ORC, and KC with a specific temperature and solution concentration exhibited the highest power generation, efficiency, and power output among the investigated cycles, respectively. Zhang et al. [5] compared the steam Rankine cycle (SRC), ORC, and steam-organic Rankine cycle (S-ORC) and concluded that the ORC exhibited optimal thermodynamic performance at residual heat temperatures of 150-210 °C, whereas the S-ORC demonstrated superior performance at 210-350 °C. Liu et al. [6] compared the thermodynamic performance of the supercritical CO 2 Brayton cycle (S-CO 2 ) and SRC at high temperatures and found that the performance of S-CO 2 was superior to that of the SRC. Moreover, the performance parameters of the equipment were analyzed from the perspective of energy conservation. The aforementioned scholars compared the performance of the ORC, OFC, KC, SRC, S-ORC, and S-CO 2 cycles for recovering waste heat of different grades. These studies highlight the suitability of the S-CO 2 and ORC for high-temperature and low-grade WHR, respectively.China has prioritized the achievement of carbon peak and carbon neutrality to mitigate the severe problem of climate change as an environmental protection strategy and as an important basis for national economic competitiveness in the future. Therefore, the use of CO 2 as a working fluid must be reassessed. CO 2 has recently been shown to exhibit tremendous potential as

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Parametric analysis and yearly performance of a trigeneration system driven by solar‐dish collectors

Cited by 55 publications

References 28 publications

Investigation the Integration of Heliostat Solar Receiver to Gas and Combined Cycles by Energy, Exergy, and Economic Point of Views

Investigation the Integration of Heliostat Solar Receiver to Gas and Combined Cycles by Energy, Exergy, and Economic Point of Views

Optimization of the design of polygeneration systems for the residential sector under different self‐consumption regulations

Energy, Exergy, Economic, Exergoeconomic, and Exergoenvironmental (5E) Analyses and Optimization of a Novel Three‐Stage Cascade System Based on Liquefied Natural Gas Cold Energy

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