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Maximizing operational efficiency of heat pumps with model predictive control: An experimental case study for residential application.
Research on noise reduction of variable speed rotary compressor with large capacity.
IIR document
Refrigerant charge optimization for Joule-Thomson cryocooler operating natural coolant blends.
Optimization of mixed fluid cascade LNG process using a multivariate Coggins step-up approach: Overall compression power reduction and exergy loss analysis.
Latching system design and latching reliability of capacity modulation compressor for refrigeration.
Design of latching system of reciprocating compressor for cooling capacity modulation.
Design of latching system of capacity modulation compressor for refrigeration.
Screw compressors: selection considerations for efficient operation. I.
Capacity adjustment of spiral compressors in use.
[In Russian. / En russe.]
Stockage de glace à l'OCDE : limitation de la puissance froid installée et réduction de la facture d'électricité.
Thermal storage at OECD: limiting the installed refrigeration capacity and cutting the electricity bill.
Part-load performance of on-off air-cooled chillers.
Analysis of the no-load characteristic of the moving coil linear compressor.
Applications and control of air conditioning systems using rapid cycling to modulate capacity.
Digital scroll technology.
Refrigeration sector monitoring
32 results
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.
Ultrasounds and metal plates: Innovative solutions for beef freezing and preservation
Ultrasound- and metal plate-assisted freezing techniques have recently been tested on beef and have outperformed conventional freezing in several key quality parameters.
Revision of EU F-Gas Regulation sparks debate
The European Parliament’s recent tougher proposals on heat pumps and air conditioners have provoked many reactions.
Design and operate data centres for the AI era
In order to meet the demanding workload from artificial intelligence (AI) along with the increased cooling needs, the industry must upgrade and innovate when designing data...
Air conditioning: towards a relaxation of the rules for the use of flammable refrigerants
While the European Commission is paving the way for the use of flammable refrigerants as an alternative for split systems, the current revision of the international standard IEC 60335-2-40 should allow higher...
Assessing the market potential of industrial heat pumps in Europe
To address the lack of product development of high temperature heat pumps, a recent article provides manufacturers with an estimate of the industrial heat pump market potential in...
Current status and future trends of natural refrigerants in North and South America
Two papers presented at the IIR Gustav Lorentzen Conference perfectly illustrate the interest in natural refrigerants and the obstacles they face in the Americas.
The development of district cooling in China
Like the huge project under construction in Shenzhen, district cooling in China has a great potential for development, given the energy benefits it offers and the strong growth in commercial...
GL2024: Improving the performance of R744-refrigeration systems at high ambient temperatures
A paper presented during the 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants proposes improving the performance of R744 refrigeration systems in transcritical operation using low-charge R290...
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...
Noise reduction strategies for screw compressors
The operating noise of twin-screw compressors is an important issue that may limit their scope of application. Two recent IJR papers suggest several noise reduction methods and analyse their...
South-East market dominated by low efficiency ACs
According to a recent report, 74% of room air conditioners (RAC) sold in six South-East Asian countries do not meet minimum threshold according to China’s MEPS. The authors modelled...
Europe: the proposal to review the F-Gas Regulation has been published, and the proposal to ban PFAS has been delayed.
At the beginning of April, the European Commission published a proposal to update the F-Gas Regulation . In addition, the proposed PFAS ban has been delayed for six months.
Revising A3 refrigerants charge limits to promote wider application
A recent IJR paper examines the validity and form of charge limits for “highly flammable” A3 refrigerants, which constitute low-GWP alternatives to HFCs. Authors propose to eliminate upper charge limits for...
CO2, one of the options for reducing the carbon footprint of refrigerated transport
Comparison of CO2 emissions from refrigerated transport units using R744 and HFC-134a and overview of solutions that could reduce the carbon footprint of this sector.
IIR news
7 results
Member news: GEA implements an innovative high-temperature heat pump at a Tiense Suiker production site
GEA has developed a high-temperature industrial heat pump utilising heat recovery, with reduced emissions.
Corporate members of the IIR react to the draft revision of the F-Gas (in French)
The AFF, AFCE and Snefcca have communicated their reactions to the draft revision of the F-Gas. Both organisations draw attention to the difficulty of following the recommendations currently...
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...
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...
Catch up on the IIR Working Group on LCCP evaluation in Chicago
IIR Working Group on Life Cycle Climate Performance (LCCP) evaluation continues to make impressive headway.
Join our second Webinar on Walk-In Cold Rooms on June 11!
Book your seat! Register to the second webinar in our '"Cool Insights" series highlighting the use of walk-in cold rooms for precooling and storage of fresh produce in the Global South.
Encyclopedia of Refrigeration
4 results
Hydrocarbon refrigerants
Hydrocarbons such as R290 (propane), R600a (isobutane) or R1270 (propene/propylene) are low GWP non-toxic natural refrigerants with excellent thermodynamic properties. They offer an...
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...
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...
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...
