Temperature of such solutions, the evaporators of scraped surface But typically they are inorganic materials like Good review of the types of FPDs used and their properties is givenīy Guilpart et al. Water and ice to exist in equilibrium together and acts as a lubricant, aiding slurry fluidity and preventing crystal agglomeration. The feedstock is anĪqueous solution of freezing point depressant (FPD) which allows
The evaporator of a vapour compression cycle. Periodically remove ice particles from the heat exchange surface in Machines use some form of wiper, rotating brush or orbiting rod to fluidised bed generation struggle to form the high iceĬontent slurries required for most applications. Innovative ice production methods like subcooling and Ice slurry is typically produced with a scraped surface ice maker Applied Thermal Engineering 51 (2013) 1255e1262Ĭoefficient of system performance, dimensionless Improving the efficiency of ice slurry systems will be crucial toĪ.N. In today’s increasingly energy conscious society, On comfort cooling in a clinic in Kuwait found that peak power useĬould be drastically reduced but that overall energy use would be Operating expenditures could be made, but that overall energyĬonsumption was 20% higher than the current HVAC and R systemĭue to the high energy demands of the ice makers. In a feasibility study of ice slurry comfort cooling inĪ tropical building, Yau and Lee found that 20% savings in Life and can be produced overnight when electricity costs are If storage tanks are well insulated, ice slurries have a long shelf In cooling applications ice slurries are attractive for theirĮxcellent thermal storage properties due to the high latent heat of All rights reserved.īehaviour of the ice slurry enables process equipment andĬomplicated geometries to be cleaned, with no wear to components To be loosened and, if the ice slurry has a sufficiently high iceĬontent, transported out of the pipe system. The increased shear causes unwanted material in the pipe The same flow rate, owing to enhanced levels of shear at the pipe Slurries through pipes give far higher pressure drops than water at Under the guise of ice pigging, where their flow characteristics areĮxploited to clean complex pipe topologies. They are also enjoying success in the water and food industries Processing and district cooling as secondary refrigerants. Solution that are increasingly being used in industries such as food Ice slurries are mixtures of fine ice particles and an aqueous
Was shown with comminution the proposed method introduces a number of challenges that require Two theoretical slurry production systems were then compared: mixing crushed ice with anįPD solution and a scraped surface ice maker with FPD solution feedstock. Following verification of the CoolPack results, further experiments wereĬonducted tha t evaluated the energy required for two stage comminution of large ice blocks into fine
#COOLPACK REFRIGERATION UTILITÉ SERIES#
A series of experiments designed to verify these predictions were carried out where the operatingĬonditions of a scraped surface ice maker were altered by retrofitting compressor speed control toĪ scraped surface ice maker. Predictions of the possible improvements to COPĬan be made in CoolPack, a refrigeration cycle simulation program, over a range of evaporator temperatures. Solution itself is frozen in a scraped surface ice maker. Producing the ice slurries used in cooling applications and ice pigging by crushing blocks of ice made from pure water and mixing the particles withĪ solution of freezing point depressant (FPD) later enables higher evaporator temperatures than if the Temperature of a vapour compression cycle is raised. Significant improvements in coefficient of performance (COP) can be made when the evaporating
#COOLPACK REFRIGERATION UTILITÉ FULL#
< A full energy audit is conducted to compare production from crushed ice versus conventional scraped surface ice makers. < Vapour compression cycle analysis is carried out to quantify savings possible by raising evaporator temperature. < Compressor speed control on existing scraped surface ice makers is used to investigate if improvements in COP can be made.
< Producing ice slurries from crushed ice can improve efficiency of secondary refrigerant loops. Queen’s School of Engineering, University of Bristol, University Walk, Bristol BS8 1TR, United KingdomĮCH Engineering, 184 Stowey Road, Yatton, Bristol BS49 4QS, United Kingdom Journal homepage: Energy conservation in ice slurry applicationsĪ.N. Applied Thermal Engineering 51 (2013) 1255e1262Ĭontents lists available at SciVerse ScienceDirect
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