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IIR document

Optimal heat rejection pressure of CO2 heat pump water heaters based on pinch point analysis.

• Author(s) : CHEN Y. G.
• Publication date: 2019/10
• Languages : English
• Keywords : Water heater, Heat rejection, Correlation, R744, Simulation, Heat pump, Pressure, Transcritical cycle, CO2
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 106
• Formats : PDF

IIR document

The effect of HTS heat rejection conditions on performance of reverse Brayton cryocooler.

• Author(s) : DHILLON A. K., BAJPAI A., GHOSH P.
• Publication date: 2019/05/08
• Languages : English
• Keywords : Superconduction, Helium, Heat rejection, Exergy, Liquid nitrogen, Brayton, Simulation, Modelling, Cryocooler
• Source: Cryogenics 2019. Proceedings of the 15^th IIR International Conference: Prague, Czech Republic, April 8-11, 2019.
• Formats : PDF

IIR document

Enhancing heat rejection from electronic devices with a supercritical carbon dioxide minichannel heat exchanger.

• Author(s) : ROSA O. C. da, BATTISTI F. G., HOBOLD G. M., et al.
• Publication date: 2019/10
• Languages : English
• Keywords : Heat rejection, Electronic component, CFD, Minichannel, Cooling, R744, Critical point, Modelling, Heat exchanger, CO2
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 106
• Formats : PDF

IIR document

Performance improvement of a large chilled-water plant by using simple heat rejection control strategies.

• Author(s) : DALIBARD A., BIESINGER A., COTRADO M., et al.
• Publication date: 2018/10
• Languages : English
• Keywords : Plant (equipment), Heat rejection, Wet bulb temperature, Control (automatic), Water chiller, Cooling capacity, Simulation, Energy efficiency, Energy saving
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 94
• Formats : PDF

Industrial heat pumps: the renewing of rejected heat.

• Author(s) : GLADIS S.
• Publication date: 2014/03
• Languages : English
• Keywords : Industrial application, Cooling, Heat recovery, Heat pump, Heating, Waste heat, Compressor
• Source: Air Conditioning and Refrigeration Journal - vol. 17 - n. 2
• Formats : PDF

IIR document

Experimental evaluation of a triple-state sorption chiller.

• Author(s) : BOWIE D., CRUICKSHANK C. A.
• Publication date: 2017/09
• Languages : English
• Keywords : Heat rejection, Chiller, Performance, Model, Expérimentation, Cold storage
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 81
• Formats : PDF

IIR document

Gascooler optimal pressure revisited.

• Author(s) : HEERUP C.
• Publication date: 2022/06/13
• Languages : English
• Keywords : Gas cooler, COP, Energy efficiency, Heat rejection, Modelling, Calculation, Heat pump, Supermarket
• Source: 15^th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15^th 2022.
• Formats : PDF

IIR document

Economic analysis of air-cooled chiller with advanced heat rejection.

• Author(s) : YU F. W., HO W. T., CHAN K. T., et al.
• Publication date: 2017/01
• Languages : English
• Keywords : Heat, Economy, Variable speed, Fan, Control (automatic), Air-source system, Model, Condenser
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 73
• Formats : PDF

Recommended by the IIR

CO₂ refrigeration for the detectors at CERN. Reliability and energy efficiency.

• Author(s) : PARDINAS A., BLUST S., VERLAAT B., HAFNER A.
• Publication date: 2020/11/11
• Languages : English
• Keywords : CO2, Particle detector, R744, Compression system, Heat rejection, Silicon, Cell, Cooling, Modelling
• Source: X Congreso Ibérico y VIII Congreso Iberoamericano de Ciencias y Técnicas del Frío, CYTEF 2020.
• Formats : PDF

IIR document

Zero gradient control for R-744 refrigeration cycles.

• Author(s) : NOEDING M., TEGETHOFF W., KOEHLER J.
• Publication date: 2019/10
• Languages : English
• Keywords : Heat rejection, Control (automatic), Gas cooler, R744, Optimization, Modelling, Transcritical cycle, COP, CO2
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 106
• Formats : PDF

IIR document

Alternative refrigerants for the primary circuit of an indirect commercial refrigeration cascade system.

• Author(s) : LLOPIS R., SÁNCHEZ D., CABELLO R., et al.
• Publication date: 2018/06/18
• Languages : English
• Keywords : Heat rejection, Display cabinet, Indirect system, Cascade system, HFO, HFC, Expérimentation, Refrigerant, CO2
• Source: 13^th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2018). Proceedings. Valencia, Spain, June 18-20th 2018.
• Formats : PDF

IIR document

Heat rejection coolers for absorption chillers – theory and field test results.

• Author(s) : LANSER W., GRAF R., SCHRÖDER M., et al.
• Publication date: 2019/08/24
• Languages : English
• Source: Proceedings of the 25^th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
• Formats : PDF

Effect of heat rejection load and wet bulb on cooling tower performance.

• Author(s) : SCHWEDLER M.
• Publication date: 2014/01
• Languages : English
• Keywords : Cooling tower, Wet bulb temperature, Performance, Heat flux, Energy efficiency
• Source: ASHRAE Journal - vol. 56 - n. 1

IIR document

Design and experimental results of a hybrid water/lithium bromide absorption-compression chiller.

• Author(s) : HELM M., ECKERT T., SCHWEIGLER C.
• Publication date: 2019/08/24
• Languages : English
• Keywords : Heat rejection, Design, Chiller, Absorption system, Compression system, Performance, Hybrid system, Testing, Water-lithium bromide
• Source: Proceedings of the 25^th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
• Formats : PDF

IIR document

A study on the real time optimal control method for heat rejection pressure of a CO2 refrigeration system with an internal heat exchanger.

• Author(s) : KIM M. S., SHIN C. S.
• Publication date: 2014/12
• Languages : English
• Keywords : Refrigerating system, Heat, Control (automatic), Gas cooler, Chilling, Optimization, Pressure, Heat exchanger, CO2
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 48
• Formats : PDF

Experimentation of a film rejecting 70% of solar heat

A team of researchers explored the ability of a phase-change material film set on windows to reject incoming solar heat.

• Publication date : 2018/12/27
• Subjects: Environment

Optimisation of a heat pump for satellite cooling

Satellites are deployed into near earth orbit in order to provide a platform for a wide range of missions, including telecommunications systems, surveillance systems and astronomical systems.These systems have seen a large increase in...

• Publication date : 2015/06/19

Alternatives to replace R404A for refrigerated transport

With about 5 million refrigerated vehicles operating worldwide, there is active research and development focusing on identifying alternatives to R404A, which is traditionally used in truck and trailer...

• Publication date : 2020/09/04
• Subjects: HFCs alternatives

U.S. Department of Energy funds 15 projects for more efficient cooling of data centres

As part of the country’s goal to achieve net-zero carbon by 2050, over 40 million USD funding to support the development of high-performance, energy efficient cooling solutions for...

• Publication date : 2023/05/30
• Subjects: Technology

ISS ammonia leak scare

Ammonia is typically used as a coolant in spaceflight systems.

• Publication date : 2015/01/29

ISO 5149 standard revision: negative vote

Draft revised ISO/FDIS 5149 (Parts 1 to 4) standard “Refrigerating systems and heat pumps -- Safety and environmental requirements” which was submitted for voting on October 3, 2012, has been rejected by ISO countries (except Part 4 on operation,...

• Publication date : 2012/10/10
• Subjects: Regulation

Cold stores: how to achieve net zero emissions?

The UK Cold Chain Federation recently released a report presenting technologies to help temperature-controlled warehouses achieve net zero emissions.  

• Publication date : 2022/07/08
• Subjects: Figures, economy, Environment

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. 

• Publication date : 2023/05/26
• Subjects: Technology

Cryogenics 2019: NICA project aims at studying the state of matter existing shortly after the Big Bang

NICA project for a new superconducting accelerator complex in Russia attracted a lot of interest during IIR Cryogenics conference in Prague, in April 2019.

• Publication date : 2019/06/28

ICR2011 highlights: micro-refrigeration development

Micro-refrigeration development was one of the important themes of the IIR Congress in Prague.

• Publication date : 2011/12/15

Vapour compression refrigeration for space applications

An IJR review paper presents the history of vapour-compression refrigeration systems used in microgravity environments and sets the next steps of research needed to achieve reliable...

• Publication date : 2021/01/27

ICCC2016 highlights: low charge ammonia systems for the cold chain

This summary refers to a paper presented during the IIR International Cold Chain Conference (ICCC2016) which took place in New Zealand. This paper can be downloaded from Fridoc database by using the direct link provided at the end of the article.

• Publication date : 2016/08/24

Briefs: Japanese experts in favour of heat pumps

According to a recent study "Heat Pumps — Long Awaited Way out of Global Warming," released by the Heat Pump and Thermal Storage Technology Centre of Japan (HPTCJ), released in October 2007, wider use of heat pump technology in Japan would result...

• Publication date : 2008/02/12

The sharp increase in refrigeration needs should be better reflected in public policies

Recently released degree-day indicators confirm the steady progression of cooling needs compared to heating in the EU. Globally, energy consumption from refrigeration (including air...

• Publication date : 2022/07/08
• Subjects: Environment

Summary of two papers of the 9th International Conference on Compressors and Coolants (ICCC2017)

The IIR 9th International Conference on Compressors and Coolants (ICCC2017), which took place in Bratislava, Slovakia, in September 2017, addressed advances in compressors but also refrigerating technologies and alternative refrigerants, as...

• Publication date : 2018/01/10

Discover the 35th IIR Informatory Note on “The Impact of the Refrigeration Sector on Climate Change”

The 35th IIR Informatory Note on “The Impact of the Refrigeration Sector on Climate Change” reviews existing data to estimate past greenhouse gas emissions generated by refrigeration systems and make projections for the future.

• Publication date : 2017/12/05

Small steps towards a giant leap! Parties to the Montreal Protocol continue discussions on HFCs

Last week saw another step towards a global agreement on the phase down of ozone depleting substances, the event started with a buzz around the new amendment proposals to the Montreal Protocol.

• Publication date : 2015/04/29
• Subjects: Regulation

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 : English, French
• Themes : Caloric cooling (magnetocaloric, electrocaloric, elastocaloric and barocaloric cooling)