MARANI CHILLER – DRIVEN BY LOW-GRADE WASTE-HEAT
Poland’s first technology for converting
waste heat into cooling capacity.
Original solution resulting from R&D work in collaboration with Bialystok University of Technology as part of a completed research project:
POIR.01.01.01-00-0301/18 entitled. "Development of two refrigeration systems, driven by 200 kW and 600 kW of waste heat capacity, adapted to chilled water temperature and high-temperature cooling".
Technology based on MARANI invention patent application “Ejector-based Refrigeration Unit”
Ejectors manufactured by the Research and Development Center of Pneumatic Components and Systems Ltd. in Kielce (MARANI Ltd. subsidiary)
Design of multi-ejector systems based on MARANI invention patent application “Tank collector”
Proprietary control system.
Supersonic ejector
Features
MARANI CHILLER units
MARANI is a supplier of complete jet chiller units designed, optimised and tailored to individual customer needs and conditions on the waste heat side. We offer chillers with drive thermal power from 100 to 600 kW. Depending on the conditions, a solution with a single chiller or several units working together is proposed, guaranteeing flexibility of operation depending on the available waste heat.
standard temperature cooling
MARANI CHILL STC
standard chilled water parameters 6oC/12oC COP from 0.25 for low temperature sources (~70oC) use for air handling units
high temperature cooling
MARANI CHILL HTC
Benefits of development
waste heat for electricity generation
Energy efficiency assessment
The utilisation of waste heat to generate cooling capacity influences the assessment of the energy efficiency of the entire plant, especially in the perspective of replacing existing standard cooling systems. The aspect of improving the energy efficiency of an entire industrial plant is particularly evident when the cooling capacity is used to cool machinery, processes or process fluids, which has a direct impact on improving process parameters, further improving the efficiency of producing the final product. In addition,
Economics
Generation of cooling capacity using waste heat generates significant savings compared to a standard energy-intensive compressor cooling system, which is often used as a chiller for chilled water or process medium or for air conditioning purposes. If a source of waste heat is available, such systems can be confidently replaced by MARANI chillers. Below is an example of the use of waste heat from an air compressor oil system with a total drive power of 400kWel, which also took into account the savings resulting from not having to switch on the cooler fans of the oil air compressors after waste heat collection was ensured.
Environment
The production of cooling capacity from waste heat, which was normally lost to the atmosphere through emissions and often requires the consumption of additional energy for its ejection, has a positive impact on the environment because it takes place with significantly less electricity consumption than standard refrigeration systems, so it is cooling capacity put into circulation without the additional carbon footprint created when it is produced.
Competitive advantage
Technological process
The use of waste or process heat in a process where it is necessary to lower the temperature of a medium also contributes to the optimisation of the process itself by eliminating additional systems working only to lower the temperature. In such a case, there is an additional process and economic benefit in the form of simultaneous implementation of a part of the process, i.e. cooling of the medium or working fluid, resulting from the use of the heat source to drive the cooling system and the generation of cooling capacity at a low temperature level for use in another process or for improving the comfort of employees.
Trigeneration
In the case of medium- and high-temperature heat sources, it is possible to compose a trigeneration system. Waste heat can be used in the first instance to drive the MARANI ORC system producing electricity. The cooled heat stream can then be used to drive the MARANI CHILLER system generating cooling capacity. Subsequently, the heat from the lower sources of both systems (heat of condensation) can be used for heating purposes or the preparation of domestic hot water.
Image and value in business
Energy efficiency, waste heat recovery and self-generation of cooling capacity also have a positive impact on the very assessment of the entrepreneur's attractiveness, maturity and technological and energy awareness. It adds value to the assessment of the enterprise by potential investors, investment financiers and those distributing funds for retrofits under support programmes, or by the end customers themselves. The implementation of sustainable operations and the reduction of the carbon footprint contributes to brand value and market recognition, and is also an element of image competition.
