Energy, Exergy, and Thermo-Economic Analysis of Renewable Energy-Driven Polygeneration Systems for Sustainable Desalination

Manesh, Mohammad Hasan Khoshgoftar; Onishi, Viviani C.

doi:10.3390/pr9020210

Cited by 31 publications

(9 citation statements)

References 91 publications

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“…A comparison with the experimental studies for existing analogs [12][13][14][15][16][17] at different operation modes and refrigerants will be carried out in further studies. Finding an optimal value of the pressure ratio between compressors C1 and C2 is also one of the next stages.…”

Section: Discussionmentioning

confidence: 99%

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An Increase in the Energy Efficiency of R744 Heat-Using Thermotransformers

Arsenyev,

Piteľ,

Korol

et al. 2023

Energies

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This article deals with improving waste heat transformation in heat-using thermotransformers. Based on the directives of the European Commission on refrigeration equipment requirements, the possibility of using carbon dioxide (R744) in heat-using thermotransformers was evaluated. The possibility of the effective use of heat-using thermotransformers operating within the Chistyakov–Plotnikov cycle in the heat pump mode was assessed. As a result, a comparative analysis was performed with existing modern plants for combined cycles with an expander, for the expansion of CO2 in saturated steam, a suction gas heat exchanger (SGHE), and a compressor–expander unit. The design schemes with a throttling device and an SGHE were selected for a comparative analysis. As a result, calculation models for evaluating the operating parameters for the initial and proposed design schemes were developed. These models allow for evaluating thermodynamic and mode parameters for heat-reducing thermotransformers. They also allow for ensuring energy efficiency indicators and conversion factors for each cycle. Overall, the dependencies for the cycle conversion ratio for the pressure increase stage in the compressor were obtained for various under-recovery rates. Moreover, the cycle conversion ratios for the proposed design schemes were obtained depending on the discharge pressure of the first compressor. The proposed design schemes allow for increasing the energy efficiency of heat-using thermotransformers by an average of 23%, depending on the suction pressure in the compressor.

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Section: Discussionmentioning

confidence: 99%

“…This process can be implemented in a regenerative heat exchanger with relatively low inlet steam superheating and flow expansion to the saturation mode in the expander. As a result, an insignificant difference in the specific adiabatic work occurs, which allows an acceptable cycle coefficient of performance to be maintained [15].…”

Section: Introductionmentioning

confidence: 99%

An Increase in the Energy Efficiency of R744 Heat-Using Thermotransformers

Arsenyev,

Piteľ,

Korol

et al. 2023

Energies

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show abstract

“…On the economic side, these systems offer cost savings over traditional air conditioning systems through their centralized design, reduced energy consumption, and lower maintenance costs. However, the initial investment required to implement these systems can be significant, and the long-term financial benefits depend on factors such as energy prices, government incentives, and system performance [88]. On the environmental side, the integration of renewable energy sources can greatly reduce carbon emissions by district cooling systems, as well as lower the impact of climate change [89].…”

Section: The Economic and Environmental Analysis Of Renewable Energy-...mentioning

confidence: 99%

A Review on Green Cooling: Exploring the Benefits of Sustainable Energy-Powered District Cooling with Thermal Energy Storage

Al-Nini

Almahbashi

et al. 2023

Sustainability

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This paper examines the economic and environmental impacts of district cooling systems (DCS) that are integrated with renewable energy sources and thermal energy storage (TES). Typically, a DCS offers a highly efficient and environmentally friendly alternative to traditional air conditioning systems, providing cool air to buildings and communities through a centralized system that uses chilled water. However, the integration of renewable energy and thermal energy storage into these systems can further increase their sustainability and efficiency, reducing their dependence on fossil fuels and improving their ability to handle fluctuations in demand. The goal of this paper is to provide a comprehensive review of the current state of the art of renewable energy-driven DCS with TES integrated and to highlight the benefits and challenges associated with these systems. Finally, the findings of this paper offer valuable insights into the potential for renewable energy-powered district cooling systems to contribute to a more sustainable and efficient built environment.

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“…With the development of different clean technologies and the growing need to obtain energy in a sustainable and economically viable way, research efforts were made to integrate unlike renewable energy sources to satisfy the energy needs of different processes [31,32]. Nevertheless, there are no reported works that extensively analyze the energy and exergetic behavior of biodiesel processes that integrate solar energy.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of Waste Vegetable Oil Conversion to Biodiesel with Solar Energy

et al. 2022

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Exergy and energy analyses of two biodiesel production processes that integrate solar energy as the main energy source were developed to determine the process with the higher efficiency from an energy and exergy approach. The biodiesel production processes were simulated in ASPEN PLUS®, and the solar energy supply was studied in TRNSYS®, using EXCEL® simultaneously for the exergetic analysis. The solar thermal energy collection system can supply 81% of the energy required by the alkali process in the Flash separation equipment. For the supercritical process, solar thermal energy can supply 74.5% of the energy in the preheating and separation stages. The energy efficiency of the supercritical process is higher; nevertheless, the exergetic efficiency of the alkaline process is higher than the supercritical one. Solar collection systems contribute from 85% to 93% of the exergy destroyed by the global process for both cases. The alkaline biodiesel production process has the highest advantages when using solar energy as the main source of energy, compared to a process in supercritical conditions that presents greater irreversibilities and requires more infrastructure to collect the solar resource. However, using solar energy as the foremost energy source offers an alternative to fossil fuels, and it provides an environmental benefit concurrently with the use of biodiesel.

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Energy, Exergy, and Thermo-Economic Analysis of Renewable Energy-Driven Polygeneration Systems for Sustainable Desalination

Cited by 31 publications

References 91 publications

An Increase in the Energy Efficiency of R744 Heat-Using Thermotransformers

An Increase in the Energy Efficiency of R744 Heat-Using Thermotransformers

A Review on Green Cooling: Exploring the Benefits of Sustainable Energy-Powered District Cooling with Thermal Energy Storage

Thermodynamic Analysis of Waste Vegetable Oil Conversion to Biodiesel with Solar Energy

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