CPOTE2024
|
8th
International Conference on
Contemporary Problems of Thermal Engineering
23-26 September 2024 | Gliwice, Poland | Hybrid event
Contemporary Problems of Thermal Engineering
23-26 September 2024 | Gliwice, Poland | Hybrid event
Abstract CPOTE2024-1055-A
Experimental analysis of a hybrid adsorption-compression cooling system with cold storage and free cooling
Marcin BORCUCH, M.A.S., Poland
Heating and cooling account for about half of the world's final energy consumption. It is the largest source of end-use energy, ahead of electricity (20%) and transport (30%), and is responsible for over 40% of global energy-related carbon dioxide emissions. Various solutions are being sought to improve the energy efficiency of refrigeration devices, and alternatives to compressor technologies are being developed - including adsorption and absorption devices.
The paper presents a project, implementation, and test results of the adsorption – compression - cold storage - free cooling - photovoltaics - solar collector hybrid system that combines the advantages of each technology into one efficient cooling system. The proposed prototype is a demonstrator of the advantages and functionalities of a set-up and at the same time, it is a complete measurement and research installation. The system was made in an extensive form, which is measured in detail, and in the next iteration, it was simplified and optimized into a mobile form of a transportable container.
The proposed configuration allows for a reduction of the condensing temperature and pressure in the compressor unit due to the continuous supply of cold generated by the adsorption unit. In circumstances where waste heat is available, this configuration benefits in reducing overall energy consumption for cold production. An additional benefit of this configuration is the reduction in the amount of refrigerant used, which results from the design of the chiller with a plate heat exchanger. The use of free cooling module, cold storage, and renewable energy sources with properly implemented control logic also allows for reducing the total energy consumption for cold production.
Various refrigerants have been analyzed for reduced condensation pressures. The prototype system is based on the assumption of the selection of the cooling capacity of the adsorption unit matching the condensing power of the compressor system with a cooling capacity of 25 kW. The system was made and tested for various operating parameters.
Keywords: Refrigeration, Adsorption, Chiller, Cold storage, Combined cooling systems
Acknowledgment: The research was co-funded by the European Union in the project POIR.01.01.01-00-0628/19 “Development of an innovative, multi-module chiller with increased energy efficiency”.