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Recommended by the IIR / IIR document

Feasibility study of dedicated R744 ejector for compressor oil return.
- Author(s) : ALAM M. M., HAIDER M., ELBEL S.
- Publication date: 2022/06/13
- Languages : English
- Keywords : R744, Ejector system, Compressor, Oil return, Modelling, Thermodynamic cycle, Lubricant
- Source: 15^th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15^th 2022.
- Formats : PDF
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Problemi di ritorno dell'olio nei compressori funzionanti in parallelo. 191e lezione di base.

Problem with the oil return in parallel compressors. 191st basic lesson.
- Author(s) : FANTONI P.
- Publication date: 2016/03
- Languages : Italian
- Keywords : Training, Operation, Oil return, Management, Flow, Compressor
- Source: Industria & Formazione - vol. 40 - n.397
- Formats : PDF
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Problemi di ritorno dell'olio al compressore: l'uso del separatore. 183a lezione di base.

Problem with the oil return to compressor: using a separator. 183rd basic lesson.
- Author(s) : FANTONI P.
- Publication date: 2015/04
- Languages : Italian
- Keywords : Training, Oil return, Lubrication, Oil separator, Control (generic), Compressor
- Source: Industria & Formazione - vol. 39 - n.388
- Formats : PDF
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Problemi di ritorno dell'olio nei compressori funzionanti in parallelo: soluzioni impiantistiche. 188a lezione di base

Problem with the oil return in parallel compressors: setting solution. 188th basic lesson.
- Author(s) : FANTONI P.
- Publication date: 2015/10
- Languages : Italian
- Keywords : Training, Oil return, Lubrication, Distribution, Compressor
- Source: Industria & Formazione - vol. 39 - n.394
- Formats : PDF
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Oil return measurements in a unitary split system air conditioner using different refrigerant mixtures.
- Author(s) : FEICHTER G. A., GROLL E. A., KURTULUS O., et al.
- Publication date: 2016/07/11
- Languages : English
- Keywords : Split system, R407C, Oil return, Measurement, Air conditioner, R22, Refrigerant
- Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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Problemi di ritorno dell'olio nei compressori funzionanti in parallelo: soluzioni impiantistiche. 189a lezione di base.

Problem with the oil return in parallel compressors: setting solution. 189th basic lesson.
- Author(s) : FANTONI P.
- Publication date: 2016/01
- Languages : Italian
- Keywords : Training, Plant (equipment), Oil return, Lubrication, Pressure, Control (generic), Compressor
- Source: Industria & Formazione - vol. 40 - n.395
- Formats : PDF
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Experimental investigation on the influence of the oil return hole on the performance of R32 wet compression cycle.
- Author(s) : ZHENG B., LIANG X., ZHUANG R.
- Publication date: 2016/07/11
- Languages : English
- Keywords : Oil return, R32, Compression system, Performance, Optimization, Expérimentation, Refrigerant
- Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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Recommended by the IIR / IIR document

Study of oil retention in suction lines with R1234ze(E) and POE32.
- Author(s) : SHAH V. M., BRAUN J. E., GROLL E. A.
- Publication date: 2021/06
- Languages : English
- Keywords : Oil return, Suction, R1234ze(E), R32, Polyolester, Lubricant, Variable speed, Air conditioning, Expérimentation, Test room
- Source: 2^ndIIR Conference on HFO Refrigerants and Low GWP Blends
- Formats : PDF
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Recommended by the IIR / IIR document

Development of hermetic large-capacity swing compressor using CO₂.
- Author(s) : OHNISHI Y., TANIWA H., KAJIWARA M., NISHIDE Y., TOMIOKA N., ADACHI M., OKAMOTO D., UEDA H.
- Publication date: 2020/12/07
- Languages : English
- Keywords : CO2, Hermetic compressor, Heat recovery, Oil return, Leakage, Two-stage system, Air conditioning, R744, Refrigerant charge
- Source: 14^th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2020). Proceedings. Kyoto, Japon, December 7-9^th 2020.
- Formats : PDF
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IIR document

The role of the lubricant chemistry in a R-744 refrigeration plant oil - return and lubricity. comparison between two chemistries using data from a real plant.
- Author(s) : MUÑOZ ALONSO M., DIXON L., SEETON C. J., et al.
- Publication date: 2017/05/11
- Languages : English
- Keywords : Refrigerating system, Polyolester, Polyalkylene glycol, Comparison, Lubrication, R744, Physico-chemical property, Oil, Expérimentation
- Source: 7^th Conference on Ammonia and CO₂ Refrigeration Technology. Proceedings: Ohrid, North Macedonia, May 11-13, 2017.
- Formats : PDF
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Oil management solutions for manifolding scroll compressors for refrigeration systems.
- Author(s) : DONG Y., ZHANG L., SUINDYKOV S., et al.
- Publication date: 2014/07/14
- Languages : English
- Keywords : Suction, Management, Vibration, Piping, Oil separator, Oil, Scroll compressor
- Source: 2014 Purdue Conferences. 22nd International Compressor Engineering Conference at Purdue.
- Formats : PDF
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IIR document

Experimental study on flooding and flow reversal in small diameter tubes with various inclinations and horizontal lengths.
- Author(s) : GUO T., JEONG J. H.
- Publication date: 2014/02
- Languages : English
- Keywords : Two-phase flow, Suction, Pipe, Household refrigerator, Oil, Expérimentation, Flow, Counterflow, Compressor
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 38
- Formats : PDF
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IIR document

Experimental investigation on startup process of R290 air-source heat pump with different lubricants.
- Author(s) : LEI B., ZHONG H., WU Q., DUAN J., WU J.
- Publication date: 2023/12
- Languages : English
- Keywords : R290, Propane, Expérimentation, Air-source system, Heat pump, Lubricant, Viscosity, Polyalkylene glycol, Mineral oil, Miscibility
- Source: International Journal of Refrigeration - Revue Internationale du Froid - Vol. 156
- Formats : PDF
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Design optimization of R744 ejector for compressor oil pumping.
- Author(s) : ALAM M., ELBEL S.
- Publication date: 2022
- Languages : English
- Source: 2022 Purdue Conferences. 19^th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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IIR document

Low charge ammonia refrigeration systems for refrigerated warehouses.
- Author(s) : JENSEN S. S.
- Publication date: 2016/04/07
- Languages : English
- Source: 4^th IIR International Conference on Sustainability and the Cold Chain. Proceedings: Auckland, New Zealand, April 7-9, 2016.
- Formats : PDF
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See all results in the Fridoc database

High efficiency, low carbon supermarket refrigeration

This paper was presented at the IIR Gustav Lorentzen Conference in Glasgow (Sep. 2004). A new but simple high efficiency refrigeration system design suitable for use in supermarkets has been developed based on standard components so that...
- Publication date : 2004/11/24
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Out of the ordinary: Keeping clay soldiers (relatively) cool

The largest group of terracotta figures ever lent by China was on display at the British Museum until April 6, 2008. The Chinese government required the 20 warriors to be kept at temperatures of 22°C + 2°C and at humidity levels of 45% RH + 8%, a...
- Publication date : 2008/05/13
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Heat pump market in Finland

According to the Finnish Heat Pump Association SULPU, 60 000 heat pumps were sold last year. In 2015, Finns invested approximately 350 million Euros in heat pumps, out of their own pockets.
- Publication date : 2016/02/03
- Subjects: Figures, economy
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Recent developments in advanced ejector technology

The objective of this paper published in the International Journal of Refrigeration is to present a review of developments in the use of ejectors focusing on the past several years.
- Publication date : 2016/08/12
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Smart Community Project to transform energy usage in the UK

A Japanese consortium is going to commence the demonstration phase of a project to help to transform the energy usage in the UK.
- Publication date : 2014/04/15
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Earth-to-air heat exchanger for air conditioning in a Colombian tropical weather

In a recent theoretical study, a passive cooling system using an earth-to-air heat exchanger (EAHE) was modelled for the Colombian tropical weather.
- Publication date : 2021/08/02
- Subjects: Developing country, Technology
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Overview of data center cooling technologies

The very huge growth in Internet traffic requires the continued development of new energy-efficient data center cooling technologies, based primarily on liquid...
- Publication date : 2022/12/15
- Subjects: Technology
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Spanish heat pump market situation

The ratio of heat pumps versus mere air conditioning units sold is bigger than 95% in the residential/domestic sector. In the commercial sector, this ratio is 90% approximately.
- Publication date : 2016/02/15
- Subjects: Figures, economy
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Siberian nematode worms kept in permafrost for 42,000 years come back to life

A team of Russian researchers revived two nematodes buried in Siberian permafrost for 32,000 and 42,000 years.
- Publication date : 2018/09/20
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Installation of a refrigerant separator in Bristol (UK)

After one year of planning, the refrigerant supplier A-Gas has completed the installation of a new refrigerant separator in Bristol.
- Publication date : 2017/09/28
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5th generation district heating and cooling networks in Europe

A recent generation of district heating and cooling networks is developing in Europe, using low temperature renewable energy heat sources (such as shallow...
- Publication date : 2022/02/28
- Subjects: Technology
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The HVAC&R market in the EMEA region in 2015

Eurovent Market Intelligence (EMI), the European Statistics Office for the HVAC&R market, has just published the results of its studies on 2015 sales in the Europe, Middle East and Africa (EMEA) region, based on the data collected from a large...
- Publication date : 2016/12/06
- Subjects: Figures, economy
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France allows Daimler to continue to use R134a in its MAC systems.

The French Supreme Court has upheld last August’s decision to overturn the MAC (Mobile air conditioning) directive and allows Daimler to continue to use R134a in its car air conditioning systems.
- Publication date : 2014/05/22
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Japan imported 87.5 Mt of LNG in 2013

Japan's LNG imports remained stable in volume (+0.2%) in 2013.
- Publication date : 2014/02/08
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SophiA project: HKA Lab test progress

SophiA HKA (Karlsruhe University of Applied Sciences) Lab test is intended to provide a better understanding of the cooling system in in different climate zones.
- Publication date : 2023/10/27
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Obituary: S. Forbes Pearson

Dr S Forbes Pearson, one of the most famous IIR person, passed away. The IIR presents its deepest sympathy and sincerest condolences to his family and relatives.
- Publication date : 2024/03/28
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