Iran Energy Association (IEA) Journal of Energy Management and Technology 2588-3372 7 3 2023 09 01 Environmental and Thermoeconomic Study of the Impact of Using Air-Cooled Condensers in the Kalina Cycle for Power Generation in Hot and Dry Regions 184 191 176184 10.22109/jemt.2022.366061.1411 EN Mahmoud Reza Shahrokhi Department of Mechanical Engineering, Iranian Research Organization for Science and Technology (IROST) Hassan Ali Ozgoli Department of Mechanical Engineering, Iranian Research Organization for Science and Technology (IROST) Foad Farhani Department of Mechanical Engineering, Iranian Research Organization for Science and Technology (IROST) Journal Article 2022 10 17 The Kalina cycle utilizes low-temperature heat sources to generate high-pressure vapor for running a turbine to produce power. Since the vapor at the turbine exit is relatively low temperature, a cool medium is required to liquefy the vapor at the condenser. This requirement imposes a practical limitation to the Kalina cycle for application in hot and dry regions. This paper studies the environmental and economic impact of using air-cooled condensers in the Kalina cycle. A dual Kalina cycle (KSC-D), the hybrid dual Kalina cycle (KSC-Dh), and the basic Kalina cycle (KSC-1) have been compared, considering Tarasht Steam Power Plant, as a case study. Subsequently, power output, water consumption, CO2 emission, and IRR , NPV were investigated for each case. Results show the least power output (4346704 kWh year-1) and the maximum power output (5008627 kWh year-1) belong to the basic Kalina cycle with an air-cooled condenser (KSC-1a) and the KSC-Dh cycle, respectively. Moreover, using air-cooled condensers in the dual Kalina cycle (KSC-Da) saves about 425825×103 m3 of water annually. KSC-Da is the most cost-effective and has the shortest payback time of three years. Also, for KSC-Da, the natural gas saved is 0.7765 to 1.22 Mm3 year-1, and the reduction in CO2 emission is about 4378 Tons year-1. The overall results indicate that although the KSC-Da ranks fourth in terms of power output among the different cases (producing 4564262 kWh year-1), it is still the most viable choice regarding the impact on the environment and reducing the amount of CO2 emissions. https://www.jemat.org/article_176184_ecf4f053c72d96a6713b745783131fc3.pdf