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IIR document

Feasibility of solar-geothermal hybrid source heat pump for producing domestic hot water in hot climates.

• Author(s) : DUARTE W. M., PAULINO T. F., TAVARES S. G., MAIA A. A. T., MACHADO L.
• Publication date: 2021/04
• Languages : English
• Keywords : Heat pump, Geothermy, Solar energy, Hot water, Domestic water, Hot climate, R290, COP, Simulation, Propane, Brazil, Case study
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 124
• Formats : PDF

IIR document

Experimental and numerical study of a CO2 water-to-water heat pump for hot water generation.

• Author(s) : ILLÁN GÓMEZ F., SENA CUEVAS V., GARCIA CASCALES J. R., VELASCO F. J. S.
• Publication date: 2021/12
• Languages : English
• Keywords : CO2, R744, Heat pump, Water-water, Heat exchanger, Heating, Hot water, Expérimentation
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 132
• Formats : PDF

IIR document

Characterisation of the behaviour of a CO2 water/water heat pump for hot water generation.

• Author(s) : GARCÍA-CASCALES J. R., MOLINA-VALVERDE R., ILLÁN GÓMEZ F., et al.
• Publication date: 2019/08/24
• Languages : English
• Keywords : Water heater, Hot water, Energy consumption, R744, Domestic heat pump, Testing, COP, Water-water, CO2
• Source: Proceedings of the 25^th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
• Formats : PDF

IIR document

Stirling cycle for hot and cold drinking water dispenser.

• Author(s) : GADELKAREEM T. M., ELDEINHUSSIN A. M. T. A., HENNES G. M., et al.
• Publication date: 2019/03
• Languages : English
• Keywords : Household application, Hot water, Cold water, Refrigerator, Stirling, Heat pump, Modelling, COP
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 99
• Formats : PDF

Experimental study of a R407C liquid-to-water heat pump with domestic hot water production.

• Author(s) : ORTEGA I., SIERES J., CERDEIRA PÉREZ F., et al.
• Publication date: 2018/07/09
• Languages : English
• Keywords : R407C, Hot water, Temperature, Heat pump, Expérimentation, COP, Domestic water, Scroll compressor
• Source: 2018 Purdue Conferences. 17^th International Refrigeration and Air-Conditioning Conference at Purdue.
• Formats : PDF

IIR document

A propane water-to-water heat pump booster for sanitary hot water production: seasonal performance analysis of a new solution optimizing COP.

• Author(s) : TAMMARO M., MONTAGUD C., CORBERÁN J. M., et al.
• Publication date: 2015/03
• Languages : English
• Keywords : Hot water, Heat recovery, R290, Propane, Heat pump, Performance, Optimization, Water-water
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 51
• Formats : PDF

IIR document

A propane water-to-water heat pump booster for sanitary hot water production: seasonal performance analysis of a new solution optimizing COP.

• Author(s) : TAMMARO M., MONTAGUD C., CORBERÁN J. M., et al.
• Publication date: 2014/08/02
• Languages : English
• Keywords : Hot water, Heat recovery, R290, Propane, Heat pump, Performance, Optimization, Water-water
• Source: 11^th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2014). Proceedings. Hangzhou, China, August 31-September 2, 2014.
• Formats : PDF

Numerical assessment of the use of a dedicated mechanical subcooling system during hot water generation in a water to water transcritical CO2 heat pump.

• Author(s) : ILLÁN GÓMEZ F., GARCIA CASCALES J. R., SANCHEZ VELASCO F. J., OTON MARTINEZ R. A.
• Publication date: 2022/04
• Languages : English
• Keywords : Heat pump, Water-water, CO2, R744, Subcooling, R1234yf, Modelling, Hot water
• Source: XI Congreso Ibérico y IX Congreso Iberoamericano de Ciencias y Técnicas del Frío, CYTEF 2022.
• Formats : PDF

Zpetné získávání tepla v oblasti prípravy teplé vody.

Heat recovery in the field of hot water preparation.

• Author(s) : VAVRICKA R., MATUSKA T.
• Publication date: 2016/06
• Languages : Czech
• Keywords : Household application, Hot water, Heat, Heat recovery, Heat exchanger, Waste water
• Source: Vytápení Vetrání Instalace - vol. 25 - n. 3
• Formats : PDF

Dynamic investigation of thermal behavior in a hot water storage tank.

• Author(s) : YANG R., ZHENG B., LIANG X., et al.
• Publication date: 2018/07/09
• Languages : English
• Keywords : Water heater, Hot water, CFD, Temperature, Tank, Air-source system, Heat pump, Heating
• Source: 2018 Purdue Conferences. 17^th International Refrigeration and Air-Conditioning Conference at Purdue.
• Formats : PDF

IIR document

Hot water heat pump with low-charge propane refrigerant.

• Author(s) : WINTHEREIK F. P., PEDERSEN P. H., LAURIDSEN T.
• Publication date: 2022/06/13
• Languages : English
• Keywords : Domestic water, Domestic heat pump, Hot water, Low charge, Propane, Energy efficiency, Condenser, Modelling, Thermodynamic property, Prototype, Testing, Refrigerant charge
• Source: 15^th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15^th 2022.
• Formats : PDF

Development of a new GAX-based absorption heat pump for Domestic Hot Water production.

• Author(s) : PHAN H. T., ASTE F., DEMASLES H.
• Publication date: 2023/05/15
• Languages : English
• Keywords : Heat pump, Absorption system, Ammonia-water, Hot water, Modelling, Expérimentation, Heat exchanger
• Source: 14^th IEA Heat Pump Conference 2023, Chicago, Illinois.
• Formats : PDF

Numerical comparison of several control strategies for domestic hot water generation in a CO2 heat pump water heater.

• Author(s) : ILLÁN GÓMEZ F., SENA CUEVAS V., GARCIA CASCALES J. R., SÁNCHEZ-VELASCO F. J.
• Publication date: 2020/11/11
• Languages : English
• Keywords : Domestic heat pump, Hot water, CO2, R744, Energy efficiency, Energy consumption, Expérimentation, Modelling, Water heater
• Source: X Congreso Ibérico y VIII Congreso Iberoamericano de Ciencias y Técnicas del Frío, CYTEF 2020.
• Formats : PDF

Energy saving. 90°C hot water NH3 heat pumps in dairy plants.

• Author(s) : BOONE J.
• Publication date: 2015/06/12
• Languages : English
• Keywords : Industrial application, Hot water, Ammonia, Heat pump, Dairy, Environment, Energy saving
• Source: Le ultime tecnologie del freddo e del condizionamento. Atti del 16° Convegno Europeo: June 12-13, 2015, Milano, Italia.
• Formats : PDF

IIR document

Experimental analysis of the use of a subcooler coupled with the evaporator in a water to water CO2 heat pump for hot water generation.

• Author(s) : GARCIA CASCALES J. R., ILLÁN GÓMEZ F., SANCHEZ VELASCO F. J., DELGADO MARÍN J. P., OTON MARTINEZ R. A.
• Publication date: 2023/08/21
• Languages : English
• Keywords : Expérimentation, Domestic water, Domestic heat pump, COP, Transcritical cycle, Energy efficiency, Hot water, Subcooling
• Source: Proceedings of the 26^th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
• Formats : PDF

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

European heat pump market repartition by energy source

Air continues to be the main energy source (more than 85%) used in the European heat pump markets. The aerothermal heat pump segment is dominated by air/air (with heating functionality) and air/water units used for heating and hot water production.

• Publication date : 2016/02/03
• Subjects: Figures, economy

Meeting the cooling and freshwater needs of arid countries

In a recent review article, the authors summarised research efforts in meeting cooling and freshwater demands in arid and hot climates, using available solar...

• Publication date : 2023/03/28
• Subjects: Technology

Solar cooling potential in Spain

During the IIR-co-sponsored EuroSun 2012 conference, Carrera et al. presented the results of a study about the potential of solar thermal energy to supply heating, domestic hot water and cooling in the residential and tertiary Spanish buildings...

• Publication date : 2013/03/25

Fusion of a boiler and a heat pump into one new system, thanks to thermal compression

Boostheat company has developed a new technology that is claimed to lead to a new generation of very efficient and renewable heating, hot water and cooling systems.

• Publication date : 2015/08/04

Briefs: CO2 heat pumps in a retirement home

Villa Laura, a retirement home near Florence, Italy, is equipped with 4 water/water ground-water heat pumps operating with a transcritical CO2 cycle providing heating, air conditioning and hot water. This technology is already used to produce hot...

• Publication date : 2007/11/20

Solar absorption air conditioning

When do you need air conditioning? When it is hot and sunny. This is why Broad Air Conditioning, China, one of the world's largest manufacturers of direct-fired absorption chillers, has been focusing on solar absorption air-conditioning systems...

• Publication date : 2006/11/15

Ice Gurus

Ice tailoring appears to be the new Olympic challenge. Ice must be tailored to each athlete's needs, e.g. long-track speed skaters prefer a surface as low as -7 to -8°C, whilst figure skaters need to dig their skates into the ice in order to pull...

• Publication date : 2006/05/05

How to reuse the condensate water from air conditioners?

Review of the different uses of the condensate water rejected by air conditioners.

• Publication date : 2020/09/04
• Subjects: Developing country

R&D

The US Department of Energy's National Renewable Energy Laboratory (NREL) has developed a new air-conditioning system combining membranes, evaporative coolers and desiccants into a single device with the objective to suit to all climates,...

• Publication date : 2011/02/07

Heat pump sales grew in Europe in 2020

According to the latest market report by European Heat Pump Association (EHPA), heat pump sales grew by +7.4% in 2020, offering benefits both in terms of greenhouse gas emission...

• Publication date : 2021/11/29
• Subjects: Figures, economy

Underground river to cool the London tube

The "Cooling the Tube" competition in 2003, promising GBP 100 000 to those finding a workable solution to cool the Tube, received 3400 entries. Modern systems with large tunnels and surface lines can be cooled using air-cooling systems. However,...

• Publication date : 2005/02/11

Centrifugal chillers: new developments

New developments regarding centrifugal chillers include the world’s first production-scale chiller using water as a refrigerant and the world’s first photovoltaic direct driven inverter centrifugal chiller.

• Publication date : 2015/03/25

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

Out of the ordinary: Vanilla and ice skating on the Eiffel Tower

Special treat for the festive season: skating on a 200 m² vanilla-perfumed rink 57 m above ground level on the Eiffel Tower, with hot wine and cakes served as refreshments. Installing the rink was a technical feat: 10 tonnes of refrigerating...

• Publication date : 2005/02/11

New EU funded project began on October 1st, 2021: “SophiA - Sustainable off-grid solutions for pharmacies and hospitals in Africa”

With a budget of 8 million euros over four years, SophiA will develop containerized solutions for hospitals using natural refrigerants, solar thermal and photovoltaics to enable more and more African people to...

• Publication date : 2021/10/21
• Subjects: Developing country, HFCs alternatives, Technology, Environment

News from IIR members: Nestlé

Nestlé's confectionery production facility in Halifax, UK, has implemented an award-winning innovative ammonia heat pump plant to power its operations, cutting costs at the site by over 240 000 € per year. The system, formed by a collaborative...

• Publication date : 2011/02/07

Conference update: Sydney

The 9th IIR Gustav Lorentzen Conference Natural Working Fluids will be held in Sydney, Australia, on April 12-14, 2010. The call for papers and first announcement are now available:

• Publication date : 2009/05/18

New IIR Informatory Note on evaporative cooling

The latest IIR Informatory Note highlights that evaporative cooling is an energy-efficient technology that has many applications in air conditioning but also in short-term food storage. 

• Publication date : 2023/05/27

How to adapt in a world at 50°C? Learn more at the IMechE conference this September

On September 6-8, 2023, the Institution of Mechanical Engineers (IMechE) will host its 1st International Conference and Workshop on Climate Adaptation and Resilience in London.

• Publication date : 2023/09/05
• Subjects: Technology, Environment

ACES Inaugural Conference: “The Hot Reality: Living in a +50°C World”

The Africa Centre of Excellence for Sustainable Cooling and Cold Chain (ACES) hosted a series of events from 17 to 19 October 2023, at ACES headquarters at Rubirizi Campus in Kigali, Rwanda. 

• Publication date : 2023/11/28

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

The 27th IIR Informatory Note on evaporative cooling.

This 27th IIR Informatory Note provides a state of the art of the simple and practical technology that is Evaporative Cooling.

• Publication date : 2015/02/04

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 Congress in Yokohama: a great success!

In Yokohama, the International Congress of Refrigeration (ICR2015), a huge milestone in the refrigeration sector, saw a massive amount of information disseminated and certainly lived up to expectations with almost 1,200 conference delegates, 143...

• Publication date : 2015/09/16

Spotlight on Commission B2: at the forefront of refrigerating equipment

Coordinated by the IIR Science and Technology Council, Commission B2 focuses on promoting knowledge of refrigerating equipment technologies and their applications worldwide.

• Publication date : 2015/05/15

City, University of London organises its 11th Conference on Compressors

Organized biennially by City, University of London, the 11th International Conference on Compressors and their Systems took place on September 9-11, 2019.

• Publication date : 2019/09/30

Download the latest technical papers from the IIR Cryogenics Conference

Held on 8-11 April this year, the 15th IIR Cryogenics Conference welcomed over 120 guests from more than 22 countries.

• Publication date : 2019/07/02

15th IIR-Gustav Lorentzen Conference, June 13-15, 2022: the detailed programme is now available!

The detailed program of the 15th IIR Gustav Lorentzen Conference on Natural Refrigerants is now available online.

• Publication date : 2022/05/16
• Subjects: HFCs alternatives

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

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

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

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

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

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

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