Energy and Cost Analysis and Optimization of a Geothermal-Based Cogeneration Cycle Using an Ammonia-Water Solution: Thermodynamic and Thermoeconomic Viewpoints

Javanshir, Nima; M., Seyed Mahmoudi S.; Kordlar, M. Akbari; Rosen, Marc A.

doi:10.3390/su12020484

Cited by 24 publications

(16 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Energy costs and energy losses are reduced due to increased efficiency. This method involves solving the problem of optimizing the use of energy for installations operating on geothermal energy [16]. The method under consideration is effective and intuitive for low-temperature installations [17], but difficulties arise when solving individual technological problems for power plants using high potential energy.…”

Section: Exergo-economic Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A Case study of Exergy Losses of a Ground Heat Pump and Photovoltaic Cells System and Their Optimization

2021

View full text Add to dashboard Cite

The aim of this scientific research is to experimentally determine the exergy losses of a ground heat pump and further optimization for more efficient use of operating modes and improvement of individual structural elements. In addition, it is proposed to use photovoltaic panels as a backup power source for the experimental installation under study. The exergetic losses are calculated, not only for the ground heat pump itself, with R407C refrigerant. The research methodology consists in a comprehensive assessment of exergetic flows, their optimization using new methods of approximation of piecewise linear functions, and the development of prerequisites for the use of anergy as one of the components of a new type of analysis of the efficiency of low-potential energy sources. As a result of processing the experimental data, the values of Coefficient of performance (COP) 4.136, exergetic temperature for the lower heat source 0.0253 and for the upper heat source 0.155, exergetic efficiency of the installation 0.62, and total loss of specific exergy of the heat pump 24.029 kJ/kg were obtained. Controllers with the Modbus protocol were used for data collection. Matlab Simulink was used to process the experimental data. When carrying out the procedure for optimizing the operating modes and selecting several modes with minimal exergetic losses, an important role is given to mathematical methods of processing statistical data. The method of increasing the efficiency of the heat pump is shown, first of all, based on the use of photovoltaic panels as a backup power source and optimization of exergetic losses due to exergo-anergetic evaluation of operating modes. The authors present the measurement errors of the heat pump plant parameters in the form of a 3D Gaussian curve, which becomes possible only when applying new approximation methods in the processing of measurements.

show abstract

Section: Exergo-economic Methodsmentioning

confidence: 99%

“…In fact, the error function "θ" ("u") obtained by (16), which in this case is better referred to as the deviation function, is tabulated and given in reference books. This is also mentioned in [11].…”

Section: Theoretical Considerations In the Recommendation To Improve ...mentioning

confidence: 99%

A Case study of Exergy Losses of a Ground Heat Pump and Photovoltaic Cells System and Their Optimization

2021

View full text Add to dashboard Cite

show abstract

“…Cost rates that enter in the system, $ Chilled water flow rate produced by the exhaust gas chiller, m 3 /ḣ m 15,16 Cooling water flow rate of the exhaust gas chiller, m 3 Dead state temperature, K T 16 Inlet cooling water temperature of the exhaust gas chiller, °C T 15 Outlet cooling water temperature of the exhaust gas chiller, °Ċ…”

Section: List Of Symbolṡ C Inmentioning

confidence: 99%

“…More recently, other articles have studied the thermoeconomic evaluation of energy cogeneration with syngas, natural gas, and biogas [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermoeconomic evaluation of three proposals for the energy cogeneration unit powered by natural gas, biogas, or syngas

Freire

Santos

Almeida

2020

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

This study uses thermoeconomic analyses to compare proposed cogeneration units that use alternative internal combustion engines operating with three possible fuels: natural gas, biogas, or syngas. The technical basis of the study is thermodynamics, which enables the identification of losses and the determination of system efficiency through energy and exergy analyses conducted with the Engineering Equation Solver software. The thermodynamic tools reveal the technical potential of each energy cogeneration unit to assist the economic-technical viability analysis. The study indicates how an energy cogeneration installation with high cooling demand in commercial and industrial enterprises reduces energy costs. In the calculation of the levelized costs of electricity of the cogeneration units, the imputed electricity is the sum of the electricity saved with an absorption chiller with the electrical power produced by motor-generators. This procedure shows that the reuse of heat reduces the cost of electricity, making the hypothetical installations more economically attractive. The levelized costs obtained for syngas and biogas cogeneration units are higher than the levelized cost for the natural gas unit. However, the biogas project stands out since its levelized cost for the cogeneration unit is only six percent higher than the cost obtained for the natural gas cogeneration unit.

show abstract

Evaluation of performance improvement of the combined biomass gasifier power cycle using low‐temperature bottoming cycles: Organic Rankine cycle, Kalina and Goswami

Hosseinpour

Ozgoli

Mirzahosseini

et al. 2022

Env Prog and Sustain Energy

View full text Add to dashboard Cite

A novel combination of a conventional combined power plant and low-temperature power generators as a cogeneration cycle coupled with a biomass gasifier is presented in this study. For this purpose, mathematical modeling of organic Rankine cycle (ORC), Kalina, and Goswami cycles was performed as a bottoming power system. To achieve the goals of sustainable energy development, a portion of the fuel required for the proposed cycle has been provided using renewable biomass fuels. The results indicated that the base cycle heat recovery in all proposed scenarios would increase energy efficiencies by 6.1%, 3.3%, and 1.1%, respectively, to ORC, Kalina, and Goswami cycles. Furthermore, the results of the parametric studies on principal factors such as steam to biomass and equivalence ratios in the gasifier, working fluid types in the ORC, mass fraction of ammonia-water mixture in Kalina and Goswami cycles, as well as thermodynamic properties of the expander and condenser can be highly considered for the energy industry developers.

show abstract

Energy and Cost Analysis and Optimization of a Geothermal-Based Cogeneration Cycle Using an Ammonia-Water Solution: Thermodynamic and Thermoeconomic Viewpoints

Cited by 24 publications

References 31 publications

A Case study of Exergy Losses of a Ground Heat Pump and Photovoltaic Cells System and Their Optimization

A Case study of Exergy Losses of a Ground Heat Pump and Photovoltaic Cells System and Their Optimization

Thermoeconomic evaluation of three proposals for the energy cogeneration unit powered by natural gas, biogas, or syngas

Evaluation of performance improvement of the combined biomass gasifier power cycle using low‐temperature bottoming cycles: Organic Rankine cycle, Kalina and Goswami

Contact Info

Product

Resources

About