## 1 Introduction  
Energy efficiency and usage of clean energy have been one of the most important topics recently. Increasing consumption of fossil fuels has caused problems such as global warming, air pollution, acid rain, and ozone layer depletion [1]. For this reason, there have been attempts to use clean energy sources such as wind energy, geothermal heat, and solar energy in electricity generation and cooling purposes nowadays [2]. Besides the most commonly known renewable energy sources, waste heat can also be classified as a type of renewable and clean energy. Organic Rankine systems that utilize organic compounds instead of water have an important place in transforming low and medium grade waste heat to electrical work [3]. These systems can benefit from heat sources such as biomass, sun, ocean, and industrial waste [4]. When compared with water, organic fluids used in organic Rankine systems have lower boiling point temperature and, thus, they have the ability to take out energy of low temperature heat sources [5]. Fluids used in Rankine systems can be divided into three groups as wet, dry, and isentropic. [PERSON] et al. [6] stated that wet fluids have a negative slope, dry fluids have a positive slope and isentropic fluids have infinitely large slope in saturated vapor curve of T-s diagram. [PERSON] and [PERSON] [7] have suggested that dry or isentropic fluids should be used in organic Rankine systems since wet fluids cause high amount of saturated liquid at the exit of turbine and this situation can damage blades and decrease isentropic efficiency. Organic Rankine cycle has the same equipment and working principle with conventional Rankine cycle used in steam power plants. Moreover, organic Rankine cycle does not have the disadvantages of the conventional Rankine cycle, that are superheating during expansion process, erosion in turbine blades, and high cost of turbines [8]. Integration of ORC with VCR is a promising technology that aims using shaft power of a turbine as an input power of compressor to achieve refrigeration. Many researchers have conducted studies about integrated ORC-VCR systems. [PERSON] et al. [9] analyzed a combined ORC-VCR system under different operational conditions. The coefficient of performance of the system, that is equal to multiplication of thermal efficiency of ORC and VCR, changed between 0.3 and 1.1 according to these operational conditions. They also found out that selection of working fluid in VCR has a limited effect on thermal and electrical efficiency of the system. They concluded that HFO-1336 mzz(Z) fluid gave the best system performance. [PERSON] et al. [10] evaluated performance of butane, isobutane, propylene, and propane in an integrated ORC-VCR system. Butane was detected to be the best fluid according to analyses performed, changing boiler temperature between 60 \({}^{\circ}\)C and 90 \({}^{\circ}\)C, condenser temperature 30 \({}^{\circ}\)C and 55 \({}^{\circ}\)C, and evaporator temperature -15 \({}^{\circ}\)C and 15 \({}^{\circ}\)C. COP of the system was found to be 0.47 at 90 \({}^{\circ}\)C boiler temperature. [PERSON] [11] performed energy and exergy analysis of integrated ORC-VCR system using lots of hydrofluorocarbons, hydrofluoroethers, hydrofluoroolefins, fluorocarbons, and hydrocarbons. Results showed that R602 working fluid having the highest critical temperature gave the best system performance. Keeping condenser temperature at 25 \({}^{\circ}\)C and other parameters constant, coefficient of performance of system that is equal to multiplication of the thermal efficiency of ORC and VCR was found 0.99 and exergy efficiency of system were calculated as 53.8%. [PERSON] and [PERSON] [12] made theoretical analysis of a combined ORC-VCR system that can operate with low heat input at 60 \({}^{\circ}\)C and can perform cooling until -10 \({}^{\circ}\)C. Results revealed that R22 showed better performance when compared to R134a. [PERSON] et al. [13] studied a novel system composed of ORC and cascade refrigeration cycle.