Search results

Experimental study on performance of segmented handling air-conditioning system under part load conditions.

[In Chinese. / En chinois.]

• Author(s) : JIANG X., LIANG C.
• Publication date: 2014/10
• Languages : Chinese
• Keywords : Air conditioner, Chiller, Performance, Expérimentation, Part load
• Source: Journal of Refrigeration - vol. 35 - n. 159
• Formats : PDF

Speed-controlled compact screw compressors with optimized part-load efficiency.

• Author(s) : REICHLE M., PFAFFL J.
• Publication date: 2017/07/20
• Languages : English
• Keywords : Seasonal performance, Efficiency, Control (automatic), Chiller, COP, Part load, Screw compressor
• Source: 8th international conference on compressors and refrigeration, 2017.
• Formats : PDF

IIR document

Experimental and numerical analysis of R744 ejectors operated in part load.

• Author(s) : BANASIAK K., HAFNER A., SCHEID A., et al.
• Publication date: 2016/08/21
• Languages : English
• Keywords : Two-phase flow, CFD, R744, Simulation, Ejector, Expansion, Part load
• Source: 12^th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2016). Proceedings. Édimbourg, United Kingdom, August 21st-24th 2016.
• Formats : PDF

IIR document

Part-load characteristics of a new ammonia/lithium nitrate absorption chiller.

• Author(s) : ZAMORA M., BOUROUIS M., CORONAS A., et al.
• Publication date: 2015/08
• Languages : English
• Keywords : Lithium, Control (automatic), Chiller, Ammonia, Absorption system, Prototype, Nitrate, Part load
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 56
• Formats : PDF

IIR document

Experimental investigation of part-load performance of enhanced CO2 refrigeration systems.

• Author(s) : DOERFFEL C., BARTA R. B., HESSE U.
• Publication date: 2022/06/13
• Languages : English
• Keywords : Commercial application, CO2, R744, Part load, Ejector, Expander, Expérimentation, Thermodynamic cycle, Cylinder
• Source: 15^th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15^th 2022.
• Formats : PDF

IIR document

Thermal modeling for the motor in semi-hermetic screw refrigeration compressors under part-load conditions.

• Author(s) : CHEN W., XING Z., SHEN J., et al.
• Publication date: 2013/11
• Languages : English
• Keywords : Semihermetic compressor, Cooling, Performance, Electric motor, Model, Part load, Screw compressor
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 7
• Formats : PDF

Experiments on part load performance of ground source variable refrigerant flow system in winter.

[In Chinese. / En chinois.]

• Author(s) : YAN L., ZHANG X., ZHAO D., et al.
• Publication date: 2015/02
• Languages : Chinese
• Keywords : Winter, Variable volume, Energy consumption, Performance, Ground-source system, Expérimentation, Refrigerant, Part load
• Source: Journal of Refrigeration - vol. 36 - n. 161
• Formats : PDF

Recommended by the IIR

Part load performance of single and two stage compressors – a comparative experimental study in a R410A chiller unit.

• Author(s) : INAMPUDI S., BOTTICELLA F., ELBEL S.
• Publication date: 2021/09
• Languages : English
• Keywords : Part load, R410A, Chiller, Performance, Scroll compressor, Expérimentation, Standard, COP, Refrigerant charge
• Source: 12^th International Conference on Compressors and their Systems
• Formats : PDF

IIR document

Developing an integrated part load value for chillers of office buildings in Hong Kong.

• Author(s) : BAO Y., LEE S. H., LEE W. L.
• Publication date: 2021/09
• Languages : English
• Keywords : Chiller, Office, Building, Part load, Performance, Temperature, Hong Kong, Standard, Energy efficiency, COP, Case study
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 129
• Formats : PDF

Partial load performance analysis of a single effect absorption chiller.

• Author(s) : MAGNANI S., LAGANÁ A., BRUNO J. C., et al.
• Publication date: 2016/05/03
• Languages : English
• Keywords : Chiller, Absorption, Performance, Modelling, Part load
• Source: CYTEF 2016. VIII Congreso Ibérico y VI Congreso Iberoamericano de las Ciencias y Técnicas del Frío, Coimbra-Portugal, 3-6 mayo, 2016.
• Formats : PDF

Development and validation of a mechanistic vapor-compression cycle model.

• Author(s) : BAHMAN A. M., ZIVIANI D., GROLL E. A.
• Publication date: 2018/07/09
• Languages : English
• Keywords : Compression system, Performance, Optimization, Modelling, Cycle, Part load
• Source: 2018 Purdue Conferences. 17^th International Refrigeration and Air-Conditioning Conference at Purdue.
• Formats : PDF

IIR document

Inherent capacity modulation of a linear refrigeration compressor.

• Author(s) : ZHU Z., LIANG K., CHEN H., MENG Z.
• Publication date: 2022/11
• Languages : English
• Keywords : Linear compressor, Modelling, Cooling load, Part load, COP, Energy saving, Energy consumption, Control (automatic)
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 143
• Formats : PDF

Load-based testing of heating and cooling equipment informed by detailed energy models.

• Author(s) : FRIDLYAND A., GUADA A. B., KUMAR N., AHSAN A., KINGSTON T., GLANVILLE P.
• Publication date: 2022
• Languages : English
• Keywords : Boiler, Testing, Expérimentation, Modelling, Simulation, Part load, Energy balance
• Source: 2022 Purdue Conferences. 19^th International Refrigeration and Air-Conditioning Conference at Purdue.
• Formats : PDF

IIR document

Partial load test protocol, a way to move ahead for efficiency measurement in transport refrigeration.

• Author(s) : STUMPF A., CHAKIACHVILI B.
• Publication date: 2014/06/23
• Languages : English
• Keywords : Energy consumption, Measurement, Refrigerated transport, Energy efficiency, Part load
• Source: 3^rd IIR International Conference on Sustainability and the Cold Chain. Proceedings: London, UK, June 23-25, 2014
• Formats : PDF

Research of thermal dynamic characteristics for variable load single screw refrigeration compressor with different capacity control mechanism.

• Author(s) : WANG Z., WANG J., JIANG W., et al.
• Publication date: 2017/01/05
• Languages : English
• Keywords : Thermodynamics, Comparison, Cooling capacity, Performance, Modelling, Part load, Screw compressor
• Source: Applied Thermal Engineering - vol. 110

Mini containers, an energy-efficient solution for small farmers?

To benefit small growers, a team of researchers investigated the concept of mini containers that would consume less energy and produce fewer GHG emissions than conventional full-size...

• Publication date : 2022/12/12
• Subjects: Technology

Magnetic-bearing centrifugal compressors

This new compressor technology - presented at the 2003 AHR Expo in Chicago - may have a significant effect on the future of mid-range chillers and rooftop applications in water-cooled, evaporatively cooled and air-cooled chilled-water and...

• Publication date : 2004/07/27

Eco-friendly cooling for Tokyo’s Haneda Airport

The new international terminal of Haneda Airport opened in October 2010. It uses a combination of geothermal energy, solar power and cogeneration systems to reduce energy consumption and is also the first airport to use sodium sulphur (NaS)...

• Publication date : 2011/06/01

Chillers: efficiency takes off

Chillers are key refrigerating systems since, according to the Department of Energy, in the US, they account for about 13% of the power consumed by the nation's buildings and 9% of the overall demand for electric power. Examples below illustrate...

• Publication date : 2008/10/25

Trends and Figures: Chiller market grows and diversifies

According to reports published during the 2008 AHR Expo held on January 22-24, 2008 in New York, the chiller market in 2006 was USD 2 billion in Asia-Pacific, USD 1.5 billion in Europe and USD 1 billion in the US. The growth (as compared to 2005)...

• Publication date : 2008/05/13

Marine refrigeration

The use of natural refrigerants is gradually spreading. Here are two examples of their use in the marine sector: - Environmentally-friendly fish transport American Freedom is one of the world's largest refrigerated ships and can hold up to...

• Publication date : 2007/11/20

The benefits of thermal energy storage for cold chain applications

Several presentations at the IIR ICCC 2022 conference focused on the potential applications of Thermal Energy Storage (TES) and Phase-Change Materials (PCMs) and highlighted the...

• Publication date : 2022/07/08

GL2012 highlights: Performance analysis of ice rinks to cut down energy use

A comparison between two Swedish ice rinks shows a roughly 33% difference in terms of energy consumption

• Publication date : 2012/12/11

Cool ways to chill for cold storage and maintaining an unbroken cold chain

In an interview for FOOD Magazine, Robbie Davies (Cold Chain Centre) clarifies significant progress relating to the cold chain. Refrigeration technology is an area that has advanced considerably in recent years - particularly in road transport,...

• Publication date : 2005/06/14

Ice storage

The Paris Palais des Congrès, a vast building comprising a Congress centre, a hotel and a shopping mall is equipped with an ice storage system allowing it to optimize its power-bill management in winter, but also to shave summer peaks and to...

• Publication date : 2007/11/20

Global air-to-water heat-pump market figures

In 2010, global air-to-water (ATW) heat-pump market demand increased by 24% since the previous year.

• Publication date : 2011/12/14
• Subjects: Figures, economy

Liquid desiccant AC system cuts ice rink energy bill

Thanks to a liquid-desiccant air-conditioning system and the use of renewable energy sources, Pines Ice Arena in Pembroke, Florida, claims to have achieved 55% electricity savings, as well as a 35% reduction in natural gas consumption and a...

• Publication date : 2011/08/05

H-fluid as an alternative to HFC-134a?

The new European Directive 2006/40 on emissions from air-conditioning systems in motor vehicles - which bans F-gases with a GWP higher than 150 (such as HFC-134a) as of 2011 for new models of cars - and Californian legislation which is putting...

• Publication date : 2006/11/15

New R32 air-conditioning unit for Europe

Daikin announces Europe to see first air conditioning heat pump using the "slightly flammable" R32 refrigerant ...

• Publication date : 2013/08/12

Market assessment and financial schemes for sustainable cooling in Ghana and Senegal

In partnership with the UNEP’s “United for Efficiency”, Ghana and Senegal have implemented financing schemes to replace obsolete ACs and refrigerators, as part of the ECOWAS Refrigerators and Air Conditioners...

• Publication date : 2021/05/17
• Subjects: Figures, economy, Developing country

International events: Amsterdam

The 12th European Cold Chain Education Program took place in Amsterdam on January 26-27, 2009 and attracted over 160 participants from 24 countries. Thirty-one presentations covered a wide range of logistics issues including ways of adapting to...

• Publication date : 2009/05/18

EU project SuperSmart comes to a close: What have we learnt?

Funded by the European Union Horizon 2020 Research and Innovation Programme, the EU SuperSmart project was launched in February 2016 and recently came to an end. Want to know how to reduce energy consumption in the food retail sector?… SuperSmart...

• Publication date : 2019/02/25

IIR member news: Carrier Transicold

Quest II: container refrigeration with 65% less CO2 emission.

• Publication date : 2013/09/16

Check out the latest news from FRISBEE!

In this issue two hot topics: the test carried out to increase refrigerator performance and field test monitoring of the food cold chain in European markets.

• Publication date : 2014/03/10

Editorial by Didier Coulomb

A new year is beginning. Perhaps it will be a difficult year because the economic crisis is far from over. A lot of challenges and maybe opportunities lie ahead, because the refrigeration and air-conditioning sector, which needs to address...

• Publication date : 2011/02/07

The International Journal of Refrigeration (IJR)

The IJR is the most important scientific journal in the field of refrigeration technology. It is a co-publication of Elsevier and the IIR. Eight issues are published each year, with over 15 articles per issue. Certain issues are totally or...

• Publication date : 2006/07/26

The Centenary in Paris and future events

A joint IIR/French Refrigeration Association (AFF) conference was held in Paris on June 12, 2008 in order to celebrate the centenaries of both organizations. It was combined with the IIR statutory meetings on June 10, 11 and 13 and with various...

• Publication date : 2008/08/12

News from IIR members: Star Refrigeration

Star Refrigeration has installed a highly efficient Azanechiller at a Scottish meat processing facility. The central pumped glycol system has a total cooling capacity of 365kW and includes pumps with variable speed drives, six ceiling...

• Publication date : 2011/08/04

Discover the IIR Conference papers from 2021

Thanks to the support of its international network, last year, the IIR organised a staggering seven conferences dedicated to key themes of refrigeration.

• Publication date : 2022/04/04
• Subjects: General information

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...

• Publication date : 2023/10/24

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...

• Publication date : 2021/07/13
• Subjects: Technology, Environment

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. 

• Publication date : 2021/06/29

Past events: September and October 2021

Focus on the latest events involving the IIR. 

• Publication date : 2021/10/25

Cold Chain Technology Briefs: Now available in French and Spanish

Originally published in English, the IIR-UNEP OzonAction Cold Chain Technology Briefs have been translated into two additional languages.

• Publication date : 2020/05/26
• Subjects: HFCs alternatives, Developing country, Technology

IIR and UNEP OzonAction publish French and Spanish versions of Cold Chain Technology Briefs

Originally published in English, the five Cold Chain Technology Briefs have been translated into two additional languages.

• Publication date : 2020/05/28
• Subjects: Developing country, Technology

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...

• Last update : 2022/09/16
• Langues : French, English
• Themes : Caloric cooling (magnetocaloric, electrocaloric, elastocaloric and barocaloric cooling)

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...

• Last update : 2023/11/07
• Langues : French, English
• Themes : Freezing of foodstuffs

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...

• Last update : 2023/03/10
• Langues : French, English
• Themes : Freeze-drying in biology and medicine, Cryobiology, cryomedicine: general information

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...

• Last update : 2023/06/23
• Langues : French, English
• Themes : LNG and LPG

Ice cream manufacturing, environmental impact and market data

From a physico-chemical point of view, ice cream is a complex, frozen multiphase mixture. The manufacturing process includes several stages of freezing which are described in this...

• Last update : 2023/06/30
• Langues : French, English
• Themes : Ice creams

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...

• Last update : 2022/06/17
• Langues : English, French
• Themes : Nanofluids

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...

• Last update : 2022/09/07
• Langues : French, English
• Themes : Evaporators, condensers and other heat exchangers

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...

• Last update : 2022/06/22
• Langues : French, English
• Themes : Hydrocarbons, Containment, refrigerant charge reduction

Environmental impact of the ice cream industry

This summary document describes the environmental impact of ice cream manufacturing, which is mainly due to the energy consumption and refrigerants used.

• Last update : 2022/11/17
• Langues : French, English
• Themes : General information on environment (climate change, ozone depletion…)