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Porovnání ruzných modelu výpoctu rocní produkce tepla solárních kolektoru.
Comparison of different models for calculating the annual heat output of solar collectors.
Influence of a Cooling System on Power MOSFETs’ Thermal Parameters.
IIR document
Experimental study of liquid phase heat capacity of dimethyl ether and triethylene glycol solution.
Observer based temperature control for reduced thermal cycling in power electronic cooling.
On the use of thermal storages in low-capacity heat pump systems.
High power thermal energy storage using phase change material slurries.
High power thermal energy storage research at Lucerne University of Applied Sciences and Arts.
Odredivanje sadržaja vlage u otpadnom gasu. Standardna referentna metoda i metoda materijalnog bilansa.
Determination of the water vapor content in flue gas. Standard reference method and material balance method.
Efficiency of a two-phase nozzle for geothermal power generation.
Design and analysis of a radiation cooling system for hollow cathode testing.
Experimental study on performance of different local radiant cooling schemes.
Achieving high stability in Cryostat: A study on optimal thermal link parameters.
Thermo-economic optimization of a real polygenerative district.
Aplicação do método da equação característica num chiller por absorção com NH3/LiNO3.
Applying the characteristic equation method in NH3/LINO3 absorption chiller.
Thermal cooling multichip ultra high power LED using refrigeration cycle system.
Refrigeration sector monitoring
45 results
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.
Solar heating and cooling: key trends and challenges
In 2020, the solar thermal energy yield amounted to 407 TWh, which correlates to savings of 43.8 million tons of oil and 141.3 million tons of CO2. Although still only a niche market, solar cooling...
IIR GL2020 conference: Range of CO2 applications
Almost half of the presentations at the IIR Gustav Lorentzen conference in Kyoto focused on CO2, in commercial refrigeration systems but also in many other applications. Overview of these...
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...
Recent geothermal energy-based district cooling projects
In December 2023, district cooling projects using geothermal energy were launched in France and the United Arab Emirates.
China heat pump market in 2023
Although the country still relies heavily on coal for heating, China is currently the only major market where heat pumps sales grew in 2023, when global sales declined by 3%...
Efficiency of ground source heat pump systems
Ground source heat pumps (GHSP) have been reported to be more efficient than more widespread air source heat pumps despite higher installation costs. A recent article has reviewed parameters impacting the energy...
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...
ICR 2019: an overview of current refrigeration research (part I)
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.
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...
Cooling solutions for hybrid electric aircraft
The electrification of aircraft propulsive systems requires specific cooling technologies as part of the decarbonation of the aviation industry. A recent review article presents...
The challenges of thermal management of next-generation electronic equipment
With the increasing integration and miniaturization of electronic devices, the heat flows they generate are constantly increasing. Spray cooling has many advantages in this regard.
Solar ejector refrigeration systems: benefits and latest developments
Two IJR articles present the latest advancements in this technology and in particular the advantages of variable geometry ejectors and low-GWP refrigerants in terms of performance.
Overview of data center cooling technologies
The very huge growth in Internet traffic requires the continued development of new energy-efficient data center cooling technologies, based primarily on liquid...
Frost detection and defrosting methods: latest advances
A recent Purdue conference paper presents the state of the art regarding methods for retarding the onset of frosting, frost detection techniques and defrosting strategies, including those based on artificial...
IIR news
5 results
Heat pumps, the central theme of the recent IIR Congress
An overview of the research carried out in the field of heat pumps, with the aim of achieving greater flexibility and increased energy efficiency, in particular through to the use of thermal energy...
New IIR Informatory Note on caloric cooling technologies
IIR’s 50th Informatory Note on refrigeration technologies focuses on three promising alternative solid-state cooling technologies: magnetocaloric, electrocaloric and...
New IIR Informatory Note on thermal energy storage systems
IIR’s latest Informatory Note demonstrates that a well-designed TES system can reduce energy consumption through more efficient equipment operation and lower investment costs, thus reducing the equipment...
Two new IIR Informatory Notes on Energy Recovery!
The IIR has just published two new Informatory Notes on energy recovery: one on Energy Recovery in Mechanical Ventilation Systems and the other one on Air-to-Air Energy Recovery Equipment.
The IIR publishes two new IIR Informatory Notes on Energy Recovery!
The International Institute of Refrigeration (IIR) has just published two new Informatory Notes on energy recovery: one on Energy Recovery in Mechanical Ventilation Systems and the other one on Air-to-Air Energy...
Encyclopedia of Refrigeration
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...
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...
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...
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...
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...
