The influence of the Cerro Prieto Geothermal Field (CPGF) on groundwater quality of the close-by agricultural area was evaluated by means of chemical and isotopic determinations. According to irrigation standards, concentrations of As, Cd, Pb, Crtot, Cr(VI), Cu, Cd, Hg, B in agricultural wells...

Organic Rankine cycle (ORC) is a promising technology to recover low-grade heat, but it leads to a low efficiency due to the highest irreversible loss caused by the single-stage evaporation. The present work concerns the performance enhancement of a two-stage serial organic Rankine cycle (TSORC)...

Current situation and trends in geothermal water utilization in Croatia have been analyzed based on data gathering and observations in a period of 16 years with special attention devoted to their use for tourism purposes. Early 2014 geothermal water was utilized at 26 locations (15 springs and...

An ORC (organic Rankine cycle) module, designed and built for a specific CHP (combined heat and power)) application, is tested in this paper. The aim of the work is to characterize the system performance in the operating range allowed by the ORC. For this purpose, a test procedure has been...

In this study, an ORC (Organic Rankine Cycle) capable of generating electric power using a low-temperature heat source was developed and an experimental study was conducted. A radial turbine directly connected to the high-speed synchronous generator was also designed and developed. R245fa was...

Organic Rankine cycle can effectively recover the low grade heat source due to its distinctive thermodynamic performance. Based on the thermodynamic mathematical models of an ORC (organic Rankine cycle) system, this study examines the effects of key thermodynamic design parameters, including...

The present work is focused on the thermodynamic optimization of organic Rankine cycles (ORCs) for power generation and CHP from different average heat source profiles (waste heat recovery, thermal oil for cogeneration and geothermal). The general goal is to provide optimization guidelines for a...

It is important to improve the heat utilization efficiency for the waste heat as well as the geothermal heat because both of them will exhaust to the environment or flow back to the ground directly after the energy was recovered. In order to achieve that, a novel cascading cycle driven by the...

A single-screw expander with 155 mm diameter screw has been developed. A spiral-tube type evaporator and an aluminum multi-channel parallel type condenser have also been developed with weight of 147 kg and 78 kg, respectively. Based on the development of above components, an ORC (organic...

In this paper, an economic system optimization of an air-cooled organic Rankine cycle, powered by geothermal heat, is performed. The goal is to find the configuration of the ORC (organic Rankine cycle) which gives the highest possible net present value for the project. The cycle parameters, heat...