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IIR document
Measurements of pρTx and specific heat capacity cv for (R290 + R1243zf) binary mixtures at temperatures from (292 to 350) K and pressures up to 11 MPa.
Factors influencing thermal radiative properties of metals.
Estimation of thermal properties of lightweight mortars using a genetic algorithm.
Dynamic thermal performance of three types of unfired earth bricks.
A DSC study of the thermal properties of dry-cured ham.
Enhanced thermophysical properties of NEILs as heat transfer fluids for solar thermal applications.
Thermal simulation of a social dwelling in Chile: Effect of the thermal zone and the temperature-dependant thermophysical properties of light envelope materials.
Prediction of food thermal properties to enable accurate design of food refrigeration processes.
Influence of thermal properties of brown seaweeds (Saccharina Latissima) on atmospheric freeze-drying process in fluidized bed.
Solution properties of polyol ester lubricants designed for use with R-32 and related low-GWP refrigerant blends.
Experimental evaluation of thermal properties of R134a clathrates based PCMs for cooling applications.
Thermodynamic property measurements and modelling of CO2 + difluoromethane (R32): Density, heat capacity, and vapour-liquid equilibrium.
Preparation and properties of lauric acid-decanoic acid/tetradecyl alcohol-dodecane composite as PCMs for thermal energy storage.
Thermophysical properties and thermal stability of different sugar alcohols as phase change materials: a comprehensive review.
Effect of thermal property model selection on the accuracy of a one-dimensional numerical solution for the forced air chilling and freezing of food products.
Refrigeration sector monitoring
18 results
ICR 2019: an overview of current refrigeration research (part II)
Presentation of the main scientific and technical topics covered in the papers of the 25th IIR International Congress of Refrigeration and summary of some of the 14 keynotes.
R1234yf as a working fluid in Organic Rankine Cycle systems
A recent review article presented the use of HFO R1234yf and its mixtures in Organic Rankine Cycle (ORC) systems, namely in applications for waste heat recovery from internal...
IIR 2023 conference in Ohrid: focus on CO2 heat pumps
As demonstrated at the last IIR conference in Ohrid , heat pumps are a potential development area for the use of CO2, in particular for the thermal management of electric vehicles.
Latest research on ammonia-based absorption refrigeration systems
A recent article has reviewed literature on absorption chillers that use ammonia as a refrigerant, along with water (H2O), lithium nitrate (LiNO3), and lithium nitrate + water...
ICR 2019: an overview of current refrigeration research (part I)
Reducing the environmental impact of ultra-low temperature refrigeration systems
Ultra-low temperature (ULT) refrigeration systems often use very high-GWP HFCs. Yet, ULT systems are excluded from the scope of the regulations aimed at phasing-down HFCs. An IJR paper reviews the most promising...
Radiative cooling: smart materials to switch from heating to cooling
Researchers have developed a radiative thermal management device, composed of several layers of reflective/absorbent materials, capable of switching between heating and cooling...
IIR Rankine Conference 2020: Which alternative working fluids for ORC systems?
HFOs (hydrofluoroolefins), HCFOs (hydrochlorofluoroolefins) and hydrocarbons were the main alternatives to HFC245fa presented during the IIR Rankine Conference 2020.
Road to COP28. Energy efficiency and recovery of refrigerants
“Sustainability must refer to energy efficiency and circularity”, says Dr Laura Fedele, IIR expert.
Impact of ageing on the energy efficiency of refrigerating household appliances
A recent study shows an average increase in energy consumption of 11% after 2 years of operation and 27% after 16 years for these appliances. Ageing wall insulation and door gasket contribute to this...
Applications of artificial intelligence to refrigeration plants
A paper from the IIR TPTPR conference presents the energy performance and maintenance benefits of 19 refrigeration plants using artificial intelligence techniques.
The potential for seabed geothermal energy in the UK
An international study has shown the potential for using capillary heat exchangers for heat pumps in the shallows of the seabed, with the potential to provide heating for homes.
Radiative cooling coatings that can adapt to the seasons
A novel material can be used as a coating on building’s rooftops or windows to provide radiative cooling in the summer without overcooling in the colder months.
Next generation of working pairs in absorption heat pumps
The history and latest developments in working pairs for absorption heat pumps were discussed in a recent review article.
Radiative cooling: protecting ice from melting under sunlight
Researchers have developed a biodegradable film made of cellulose acetate which, thanks to its radiative cooling properties, effectively protects ice subjected to solar radiation from melting, with possible...
IIR news
3 results
Obituary: André Gac
The IIR is deeply saddened to learn of the passing of André Gac, former IIR Director on July 14th at the age of 98.
Spotlight on Commission B2: at the forefront of refrigerating equipment
Coordinated by the IIR Science and Technology Council, Commission B2 focuses on promoting knowledge of refrigerating equipment technologies and their applications worldwide.
Past events: The IIR around the world, August and September 2024
A look back at the IIR’s latest events during conferences (Gustav Lorentzen, Thermag, Compressors) and during sponsored vents (CHPC).
Encyclopedia of Refrigeration
6 results
Additive manufacturing of regenerators for caloric cooling
In many areas of engineering, additive manufacturing allows the production of complex and multifunctional products that could not be manufactured using traditional methods. In the...
Additive manufacturing of heat exchangers
In the refrigeration industry, additive manufacturing (colloquially referred to as “3D printing”) makes it possible to fabricate novel, complex and potentially more energy efficient...
Nanorefrigerants
Nanorefrigerants are created by adding nanoparticles in suspension to a base refrigerant. They have a thermal conductivity that is 15% to 104% higher than that of the corresponding...
Cryogenic nitrogen in the food and beverage industry
The adoption of cryogenic processes in the food and beverage industry is predominantly driven by liquid nitrogen (LIN), and it is the preferred candidate for food chilling and...
Liquefied Natural Gas: production process and cold energy recovery
Liquefied natural gas (LNG) is natural gas that has been cooled to about -160 °C and turned into a liquid to facilitate transportation and storage. A typical LNG supply chain...
Cryogenics in the pharmaceutical industry: drug design and bioavailability improvement
Research activities in the pharmaceutical sector focus primarily on developing novel drug formulations which can elicit the desired response upon being administered to the patient...
