Today, one of the most important issues in the world is that the concentration of carbon dioxide in the atmosphere which is the fundamental reason for global warming exhibits a severe increase in every passing year. It is a general view that the most crucial step to succeed in mitigation carbon emissions is the reduction of energy consumption. In this study, production and energy consumption data only for year 2016 of an industrial textile factory in Turkey were employed to explore carbon emission mitigation potential through energy efficiency. The research consists of three steps listed as i) data collection, ii) data processing and iii) data evaluation. Energy saving potential of the industry has been determined with the help of the energy consumption relations developed depending on data obtained from the factory by calculating the target energy consumption for year 2017 and beyond. Also, the amount of reduction in carbon emissions stemming from the amount of fuel saved thanks to energy efficiency has been calculated. Energy saving potential for 2017 and later years was found 98.9 TOE per year and also due to these saving, the amount of the reduction in CO2 emissions of the factory will totally be 2.75 million-tones CO2 in comparison to year 2016. It is also seen that financial savings will be approximately € 28,646.06 for the year 2017 and later years.

This study is an adaptation of ammonia cascade cooling systems using carbon dioxide on ice cream production machines and includes thermodynamic analysis of R717/R744 cascade refrigeration system with R717 refrigerant single-stage refrigeration system and investigation of its efficiency. As a result of the analyses, the COP value of the single-stage system was 3.67, the Carnot efficiency was 0.57, the second law efficiency was 0.19 and the power required to operate the compressor was 27.55 kW. In the cascade cooling system, the COP value was 4.46, the Carnot efficiency 0.59 and the compressor power 22.7 kW in the high-temperature part, while the COP value was measured as 14.65, the Carnot efficiency 0.58 and the compressor power 6.4 kW in the low-temperature part. For the whole cascade system, the COP 3.24 and the second law efficiency were found to be 0.43. When the results were compared, it was concluded that although the COP value of the cascade cooling system was 0.43 points lower than the single-stage ammonia system, when our country's climate conditions and the thermophysical properties carbon dioxide gas were considered together, one of the most suitable designs was the cascade cooling system.