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IIR document

Heat from Underground Energy London (Heat FUEL).

• Author(s) : LAGOEIRO H. R. P., CURRY D., FAULKS G., et al.
• Publication date: 2019/08/24
• Languages : English
• Keywords : United Kingdom, Metro, Heat recovery, Heat pump, Case study, Cost, District heating, Waste heat, Heat exchanger
• Source: Proceedings of the 25^th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
• Formats : PDF

Recommended by the IIR

Échangeurs de chaleur, cours et exercices corrigés.

• Author(s) : MELLARI S.
• Publication date: 2020/12
• Languages : French
• Keywords : Heat exchanger, Seal, Fin, Plate exchanger, Heat transfer coefficient, Efficiency, Training
• Formats : PDF

Recommended by the IIR / IIR document

Experimental results of a high-temperature heat pump prototype with R1336mzz(Z) for various production temperatures.

• Author(s) : MOTA BABILONI A., BARRAGÁN-CERVERA A., UDROIU C-M., GIMÉNEZ-PRADES P., NAVARRO-ESBRÍ J.
• Publication date: 2023/08/21
• Languages : English
• Keywords : High temperature, Heat pump, R1336mzz(Z), Expérimentation, Prototype, Waste heat, COP, Low GWP, R245fa
• Source: Proceedings of the 26^th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
• Formats : PDF

A numerical modelling study on submerged condensers for heat pump water heaters using low-GWP refrigerants.

• Author(s) : ZHANG M., SHEN B.
• Publication date: 2022
• Languages : English
• Keywords : Propane, Domestic heat pump, Water heater, Modelling, Low GWP, Simulation, CFD, R290
• Source: 2022 Purdue Conferences. 19^th International Refrigeration and Air-Conditioning Conference at Purdue.
• Formats : PDF

A review of recent investigations on flow and heat transfer enhancement in cooling channels embedded with triply periodic minimal surfaces (TPMS). 

• Author(s) : YERANEE K., RAO Y.
• Publication date: 2022/12
• Languages : English
• Keywords : Review, Heat transfer, Porosity, additive manufacturaring, Heat exchanger, Mass transfer, Thermodynamic property
• Source: Energies - vol. 15 - n. 23
• Formats : PDF

IIR document

Experimental investigation of high-glide refrigerant mixture R1233zd(E)/R1234yf in a high-temperature heat pump.

• Author(s) : BRENDEL L. P. M., BERNAL S. N., ARPAGAUS C., WIDMAIER P., ROSKOSCH D., BARDOW A., BERTSCH S. S.
• Publication date: 2023/08/21
• Languages : English
• Keywords : Zeotropic mixture, High temperature, Heat pump, R1233zd(E), R1234yf, Expérimentation, COP, Glide, HFO, Industrial application, Thermodynamic cycle, Modelling
• Source: Proceedings of the 26^th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
• Formats : PDF

IIR document

Experimental assessment of the use of R515B as R1234ze(E) alternative in a small water-to-water heat pump.

• Author(s) : COLOMBO L. P. M., FRIGERIO D., LUCCHINI A., MOLINAROLI L.
• Publication date: 2023/08/21
• Languages : English
• Keywords : Expérimentation, R515B, R1234ze(E), Water-water, Heat pump, Drop-in, COP, Testing
• Source: Proceedings of the 26^th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
• Formats : PDF

A review of the mathematical models for the flow and heat transfer of microencapsulated phase change slurry (MEPCS).

• Author(s) : LI H., YU G., XU H., HAN X., LIU H.
• Publication date: 2023/03
• Languages : English
• Keywords : Heat transfer, Change of phase, Simulation, Model, Thermal energy storage, Review, Thermodynamic property, Modelling
• Source: Energies - vol. 16 - n. 6
• Formats : PDF

IIR document

Une nouvelle approche d'optimisation de pompe à chaleur tenant compte du couplage entre les réservoirs thermiques et le cycle.

• Author(s) : FEIDT M., COSTEA M.
• Publication date: 2021/12
• Languages : French
• Keywords : Heat pump, Optimization, Carnot, Cycle, Reversed cycle, Tank, COP, Energy consumption, Review, Modelling
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 132
• Formats : PDF

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.

• Author(s) : SHENG B., DONG X., ZHAO Y., LI Z., YAN H., ZHONG Q., WANG J., GONG M., SHEN J.
• Publication date: 2020/04
• Languages :
• Keywords : R290, Propane, R1234zf, Thermodynamic property, Temperature, Pressure, Heat capacity, Expérimentation, Mixture
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 112
• Formats : PDF

Control of Heat Transfer in a Vertical Ground Heat Exchanger for a Geothermal Heat Pump System.

• Author(s) : SALHEIN K., KOBUS C. J., ZOHDY M.
• Publication date: 2022/07
• Languages : English
• Keywords : Geothermy, Ground-source system, Heat pump, Modelling, Case study, Heat transfer, Heating, Cooling, Simulation
• Source: Energies - vol. 15 - n. 14
• Formats : PDF

IIR document

Investigation of air-source heat pump using heat pipes as heat radiator.

• Author(s) : XU S., DING R., NIU J., et al.
• Publication date: 2018/06
• Languages : English
• Keywords : Heat pipe, Air-source system, Heat pump, Performance, Expérimentation, COP, Heating
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 90
• Formats : PDF

Range of application of heat pumps – Implementation of heat pumps with different heat sources.

• Author(s) : BOCKELMANN F., PETER M., SCHLOSSER M.
• Publication date: 2021/08/31
• Languages : English
• Keywords : Heat pump, Heat exchanger, Absorption system, Adsorption system, District heating, Solar thermal system, Heat source, Geothermy, Borehole, Design, Programming, Compression system
• Source: 13^th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
• Formats : PDF

IIR document

Comparison of heat exchange rates between straight and slinky horizontal ground heat exchanger.

• Author(s) : SELAMAT S., MIYARA A., KARIYA K.
• Publication date: 2015/08/16
• Languages : English
• Keywords : Spleen, Heat transfer, Ground, Simulation, Heat pump, Heat exchanger
• Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
• Formats : PDF

Heat transfer in horizontal ground heat exchangers.

• Author(s) : KUPIEC K., LARWA B., GWADERA M.
• Publication date: 2015/01/22
• Languages : English
• Keywords : Geothermy, Temperature variation, Heat transfer, Ground, Modelling, Heat exchanger
• Source: Applied Thermal Engineering - vol. 75

Residential CO2 heat pump system for combined space heating and hot water heating

This paper was presented at the IIR Gustav Lorentzen Conference in Glasgow (Sep. 2004). A theoretical and experimental study was carried out for a residential brine-to-water CO2 heat pump system for combined space heating and hot water heating - a...

• Publication date : 2004/11/24

New combined CO2 heat pump and solar heating system.

The Institut für Thermodynamik at the Technical University of Braunschweig (www.ift.tu-bs.de) has developed a new heating system based on a CO2 heat pump connected with a solar storage tank. A...

• Publication date : 2007/12/03

GL2012 highlights: compact CO2 air-heating heat pump for industrial drying

Researchers in Japan studied and developed a small capacity CO2 heat pump for industrial drying that is hoped will reduce power consumption to about one third.

• Publication date : 2012/10/04

Heat pumps

- Analysis of sales of heat pumps in Austria over 2003 and 2004 has shown good growth in the heating and controlled dwelling ventilation segments. The figures were compiled with the National Ministry for Transportation, Innovation and Technology,...

• Publication date : 2005/07/19

Markets: Heat Pumps

- Heat pumps hot in Europe According to the Swedish Heat Pump Association, SVEP, the Swedish market for domestic heat pumps has developed greatly over the last ten years, with over 100 000 heat pumps being sold in 2004. Exhaust air heat...

• Publication date : 2006/05/05

Markets: Heat pumps

The French heat-pump market grew 112% in 2006, reaching 53 510 units sold. The sales increase was even greater in Germany, where 139% growth occurred.

• Publication date : 2008/02/12

CHEs in heat pumps

In its Annex 33, "Compact Heat Exchangers in Heat Pumping Equipment" issued in September 2010, the Heat Pump Programme details the benefits of using compact heat exchangers (CHEs): . Improved heat exchanger thermal effectiveness: thermal...

• Publication date : 2011/02/07

Heat exhangers: what's new?

Nanotechnology: the future of heat exchangers? The US Department of Energy has awarded contracts to improve energy efficiency. One such contract, awarded to TIAX, a technology development company, through the Small Business Innovation...

• Publication date : 2006/05/05

Heat Pump Programme success

The International Energy Agency (IEA) launched a Heat Pump Programme in January 2003, which ended in May earlier this year. Ten countries participated in the programme: Austria, Canada, France, Japan, Norway, Sweden, UK and USA. They joined...

• Publication date : 2005/11/23

Heating and cooling ceilings

The upcoming translation of European Directive 2002/91/EC on improving energy efficiency in buildings into EU national legislation in January 2006 calls for a clear improvement in the energy efficiency of cooling and heating systems. In view of...

• Publication date : 2005/10/26

Converting waste heat into cooling

A prototype that has succeeded in converting waste heat into cooling capacity could lead to new solutions to harness excess energy produced by systems.

• Publication date : 2012/03/23

Market: European heat pump market

- The European Heat Pump Association (EHPA) has published an updated version of its outlook for the European heat pump market. The report shows that after 2 years of very difficult economic times, the market decline has stopped and heat pump...

• Publication date : 2011/02/07

Market: Japanese heat pump market

A Japanese market research company has analysed the Japanese heat pump market for applications in Eco-Cute water heaters and air-conditioners and published a forecast for market development over the next 10 years. Growth expectations for the...

• Publication date : 2011/02/07

Markets: Nordic heat-pump markets

In Sweden, heat pump sales reached a record 48 806 in 2003. Until now, single-family homes were the main niche, but growth is expected to shift to apartment buildings. Source: Swedish Heat Pump Association, Martin Forsén, Tel: +46 8 762 75 Norway...

• Publication date : 2004/07/27

Heat pump penetration in Europe

In spite of the overall market setback in 2009, the long-term growth trend for heat pumps in Europe is upwards, says a report from the IEA Heat Pump Centre (Sweden). For the 9 countries analysed, the total installation rate was 525 000 units...

• Publication date : 2011/06/09

New IIR publications: Saving Energy in Refrigeration, Air-Conditioning and Heat-Pump Technology

The French version of the IIR guide Saving Energy in Refrigeration, Air-Conditioning and Heat-Pump Technology will be published in November 2009; the goal of this guide is to provide practical ways of minimizing the energy consumption of...

• Publication date : 2009/12/09

INDEE+: Focus on the two-day workshop “Hotel Decarbonisation using R744 Heat Pump/chiller” organised in April

A two-day workshop titled “Hotel Decarbonisation using R744 Heat Pump/chiller” was organised on 26-27 April 2024 at Antarim Resorts, Goa. The technical session was followed by a demonstration of the R744 HP/C...

• Publication date : 2024/05/28

New IIR Informatory Note on Air-source heat pumps for space heating and cooling

The IIR has issued a new Informatory Note on Air source heat pumps for space heating and cooling. A summary for policymakers and a Chinese version of this note have also been published.

• Publication date : 2021/02/23

New IIR Informatory Note on high-temperature heat pumps

IRR’s latest Informatory Note demonstrates that high-temperature heat pumps are a key technology in the decarbonisation of process industries. 

• Publication date : 2021/10/22

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

Call for papers: 2014 International Sorption Heat Pump Conference

ISHPC 2014 extends abstract deadline until September 13, 2013

• Publication date : 2013/09/03

See you at the 2nd China Heat Pump Conference in 2024

Join this co-sponsored IIR conference on heat pumps in China set to be bigger than the first!

• Publication date : 2023/06/13
• Subjects: Technology

Commission E2: at the forefront of heat pumps and energy recovery

Activities of the IIR’s Commission E2 “Heat Pumps, Energy Recovery”

• Publication date : 2015/07/01

Activities of the IIR’s Commission E2 “Heat Pumps, Energy Recovery”

Presentation of IIR Commission E2 activities by Per Lundqvist, President of Commission E2

• Publication date : 2015/05/22

New IIR Working Group on Solid-State Cooling and Heating

Initiated by Andrej Kitanovski (Slovenia), this working group's first objective is to promote international research collaboration in the areas of solid-state cooling, heat pumps, and energy...

• Publication date : 2022/07/08

IIR member news: Excess heat is the largest untapped energy source

In a whitepaper, IIR Benefactor member Danfoss highlights the vast untapped potential of excess heat as a source of energy.

• Publication date : 2023/03/27

Discover the 30th Informatory Note on Heat-Sensitive Health Products

In this Informatory Note, the IIR has defined the issues and challenges that need to be addressed in order to ensure that reliable cold chains, along the distribution chain of products essential to public health, are put in place.

• Publication date : 2016/01/13

Hot off the press: Handbook on Indirect Refrigeration and Heat Pump Systems

Be the first to read the newly published IIR Handbook on Indirect Refrigeration and Heat Pump Systems.

• Publication date : 2015/08/05

Invitation to join the IIR working group: Solid-state cooling and heating

Established last year, this latest IIR working group aims to promote international research collaboration to provide energy efficient and environmentally friendly solutions for a variety of solid-state...

• Publication date : 2023/05/02
• Subjects: Technology

Join our training course and officially become a new Ambassador for clean cooling and heating!

Experts and representatives from three sister projects in different regions of the world: ENOUGH in Europe, INDEE+ in India and ACES in Africa are arranging a free one-hour training course on clean cooling and...

• Publication date : 2023/06/30
• Subjects: Environment, HFCs alternatives

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

For IIR members only

Heat pump stock in Europe

This table presents the stock of installed heat pumps, the CO2 emissions avoided and the number of jobs in the heat pump sector in Europe.

• Last update : 2021/12/14
• Langues : English
• Themes : Heat pumps, energy recovery: economics and statistics

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

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 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)

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

Global warming potential (GWP) of HFC refrigerants

Using the latest updated data from UNEP’s RTOC 2022 report, we have compiled the 100-year GWP and 20-year GWP values of hydrofluorocarbon-based (HFC) refrigerants. Our table includes...

• Last update : 2023/09/15
• Langues : French, English
• Themes : HFCs

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

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…)

Thermophysical properties of HFC refrigerants

Thermophysical properties of over 100 HFC refrigerants, including single-component and blends.

• Last update : 2022/06/17
• Langues : English
• Themes : HFCs, HFO et HCFO, Blends

Thermophysical properties of HFO refrigerants

Thermophysical properties of over 50 HFO refrigerants, including single-component and blends.

• Last update : 2022/06/17
• Langues : English
• Themes : HFO et HCFO, Blends

Thermophysical properties of hydrocarbon refrigerants

Thermophysical properties of over 20 hydrocarbon refrigerants, including single-component and blends.

• Last update : 2022/06/17
• Langues : English
• Themes : Hydrocarbons, Blends

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