Exergy analysis of electricity generation for the geothermal resources using organic rankine cycle: Kızıldere‐denizli case

Increased energy price and CO2 emissions through burning fossil fuel for heating nursery pig houses in winter are major problems. This study was conducted to evaluate the combined effects of an active solar and geothermal heating system (CSGHP) on electricity use, cost, and CO2 and noxious gas emissions from pig houses during heating in winter at the experimental farm of Sunchon National University, Korea. The electricity use, inside room temperature, humidity, and noxious gas emissions were measured and CO2 emissions and costs were calculated based on the difference in electricity used by control (conventional electric heating system) and CSGHP supported pig houses. A significant increase in internal room temperature was found in the CSGHP system relative to the control house (P < 0.05). Electricity use, CO2 emissions and costs were reduced substantially in the CSGHP system compared with the control house. Moreover, noxious gas emissions were reduced significantly in the CSGHP system relative to the control (P < 0.05). Overall, the results of this study indicated that the CSGHP system has the potential to reduce electricity use, overall cost and CO2 and noxious gas emissions. Therefore, the CSGHP system has the potential for use as an environmentally friendly renewable energy source for animal houses. © 2016 American Institute of Chemical Engineers Environ Prog, 35: 1156–1165, 2016

Section: Electricity Consumption Co 2 Emissions Cost Savings and Nmentioning

confidence: 99%

Combined active solar and geothermal heating: A renewable and environmentally friendly energy source in pig houses

Islam

Mun

Bostami

et al. 2016

“…They stated that hexamethyldisiloxane (MM) fluid was the most stable and optimum fluid at temperatures over 3008C. Tunç et al [8] conducted a study of a 20.4-MW geothermal flash steam power plant located in Denizli in the Kızıldere area, and they stated that ORC power plant would be more efficient than a flash steam power plant. They mentioned that exergy analysis is the most effective method for calculating a plant's efficiency.…”

Section: Introductionmentioning

confidence: 99%

Exergoeconomic analysis of a geothermal organic Rankine cycle power plant using the SPECO method

Ergün

Özkaymak

Koc

et al. 2017

In this study, exergy and exergoeconomic analyses were performed for a geothermal, Rankine cycle (Binary) power plant that generates 7.5 MW of power. The exergy analysis showed that the highest destruction of exergy, that is, about 3200 kW, occurred in the vaporizer. The losses were about 2670, 1700, 1035, 880, 421, 349, 306, and 33 kW in the turbine, recuperator, condenser, separator, organic fluid pump, production pump, preheater, and injection pump, respectively. The exergy efficiency of the system was calculated as 32.3% at the reference temperature of 25°C. The unit cost of the electricity produced in this plant is 7.96 $/Gj according to the exergoeconomic analysis that was made using the specific exergy cost (SPECO) method. It was determined that using low temperature sources is meaning significant. Thus, thermodynamic and thermoeconomic (exergoeconomic) analyses should be conducted in current plants to identify the inefficient equipment that is increasing costs. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 936–942, 2017

“…The ODP of these components are zero since they do not contain chlorine atoms. Their GWP are less than those of R-12 and R-22 because they contain more hydrogen atoms and thus have a shorter atmospheric lifetime [47][48][49][50][51][52][53][54][55][56][57]. Some thermodynamic properties of the working fluids used in the model are shown in Table 3.…”

Section: Working Fluid Properties For the Modelmentioning

confidence: 99%

Thermodynamic analysis and performance improvement of Irem geothermal power plant in Turkey: A case study of organic Rankine cycle

Ünverdi

Çerçi

2017

Renewable and environmentally friendly energy sources are becoming increasingly important nowadays. This growth in importance also has an effect on the energy conversion systems using more eco‐friendly and renewable energy sources (geothermal, wind, solar) than fossil fuels, the use of which has been reduced these days (oil, coal, natural gas, etc.). From this perspective, renewable energy sources and the conversion efficiency of the facilities which use these sources have also gained importance. The purpose of this study is to calculate the energy and exergy efficiency of the Irem binary cycle geothermal power plant located in Germencik‐Aydın, Turkey geothermal area. Data measured in the power plant were used in the calculations, and correlations were developed depending on the ambient temperature. In addition, exergoeconomic analysis was performed by taking into account the total cost of the power plant (investment and maintenance costs). The greatest energy (97,805.34 kW) and exergy (6463.8 kW) losses were observed in the air‐cooled condenser. The first law efficiency and the second law efficiency of the power plant were found to be 5.89% and 33.8%, respectively. Furthermore, a model was proposed for 6 different refrigerants with the purpose of investigating the availability of the waste heat and consists of a numerical thermodynamic optimization of the model in this study. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1523–1539, 2018