Wyniki wyszukiwania dla: LOW GWP REFRIGERANTS

• Combined cold supply system for ship application based on low GWP refrigerants - Thermo-economic and ecological analyses

  Publikacja

  • J. Wajs
  • M. Mrózek
  • E. Fornalik-Wajs

  - ENERGY CONVERSION AND MANAGEMENT - Rok 2022

  The withdrawal of popular high-GWP refrigerants will significantly affect maritime industry. Refrigeration and air conditioning systems currently used on ships are not ready to fulfil future limitations. Therefore, there is a need for system, which will operate with low-GWP refrigerants and at the same time will be efficient and reliable in difficult environmental conditions. This paper explains the concept of a cold supply system,...

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• Performance of the very high-temperature heat pump with low GWP working fluids

  Publikacja

  • D. Mikielewicz
  • J. Wajs

  - ENERGY - Rok 2019

  Traditional heat pumps are a very attractive pro-ecological solutions for a number of applications, including providing of heating or heat recovery from industrial processes. The application range of heat pumps could be greatly enlarged when the operating temperature would be increased to 130-150°C and/or the temperature lift can be increased to 50-100 K. In the paper, the very high temperature vapour-compressor based single stage...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Jan Wajs dr hab. inż.

  Osoby

  Zakład Ogrzewnictwa, Wentylacji, Klimatyzacji i Chłodnictwa, Instytut Energii

• The impact of environmentally friendly refrigerants on heat pump efficiency

  Publikacja

  • T. Muszyński
  • R. Andrzejczyk
  • B. Jakubowska

  - Journal of Power Technologies - Rok 2019

  This paper discusses the issue of heat pump simulation. Lower operating costs can be achieved through good equipment design and appropriate operation. Detailed technical and economic analysis inform the selection of system components with the highest possible efficiency and lower energy demand. The use of systems based on environmentally friendly refrigerants can deliver long product life, which is associated with a shorter payback...

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• Horizontal flow boiling of refrigerants inside porous coated tube.

  Publikacja

  • J. Cieśliński
  • B. Dawidowicz

  - Rok 2005

  Przedstawiono wyniki badań przejmowania ciepła i spadku ciśnienia podczas wrzenia czynników chłodniczych R22, R134a i R407C w poziomej rurce z wewnętrzną powłoką porowatą.

• Marek Pszczoła dr hab. inż.

  Osoby

  Katedra Inżynierii Transportowej

  I am a Faculty member (Department of Highway and Transportation Engineering) at the Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Poland). My main research interests include: low-temperature properties of asphalt mixtures, low temperature cracking assessment of pavement structures, road materials properties, thermal stress analysis, design of pavement structures, airfield design and analysis....

• Wartość rezydualna w wycenach spółek notowanych na GWP w Warszawie.

  Publikacja

  • B. Prusak

  - Przedsiębiorstwo & Finanse - Rok 2016

  Jednym z kluczowych elementów w procesie wyceny przedsiębiorstw stanowi kalkulacja wartości rezydualnej. W wielu przypadkach stanowi ona ponad 50% całkowitej wartości przedsiębiorstwa. Chociaż w literaturze przedmiotu są prezentowane różne koncepcje wyceny wartości rezydualnej to jednak brakuje kompleksowego podejścia. Dlatego też głównym celem opracowania jest krytyczna analiza metod wyceny wartości rezydualnej wraz z określeniem...

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• Wpływ ekologicznych czynników roboczych na efektywność układu sprężarkowej pompy ciepła (The impact of environmentally friendly refrigerants on heat pump efficiency)

  Publikacja

  • T. Muszyński
  • R. Andrzejczyk
  • B. Jakubowska

  - Instal - Rok 2016

  Artykuł poświęcony jest zagadnieniu symulacji pracy układu sprężarkowej pompy ciepła. Prawidłowe zaprojektowanie instalacji oraz jej właściwe użytkowanie pozwala na zmniejszenie kosztów eksploatacji. Dokładna analiza techniczno-ekonomiczna umożliwia natomiast dobór elementów systemu o możliwie największej sprawności, a zatem niskim zapotrzebowaniu na energię. Zastosowanie układów opartych o perspektywiczne, proekologiczne czynniki...

• Analysis of the selection of low temperature medium for a turbine power plant using ocean thermal energy (OTEC)

  Publikacja

  • D. Stępniak
  • M. Piwowarski

  - Rok 2013

  The paper presents the results and conclusions of numerical calculations modelled in the EES program of a closed OTEC cycle. The following mediums were analysed: ammonia, R32, R41, R404a, R407c, R410a, R423a, R500, R502, R507a and R114, R152a, R234fa, R600, R1234yf, R1234ze. Analogous assumptions were adopted as in the ORC cycle with heat regeneration for dry refrigerants without regeneration for wet refrigerants. Each of them...

• Analysis of the selection of low-temperature medium for a turbine power plant using ocean thermal energy (OTEC)

  Publikacja

  • D. Stępniak
  • M. Piwowarski

  - Mechanics / AGH University of Science and Technology - Rok 2013

  The paper presents the results and conclusions of numerical calculations modelled in the EES program of a closed OTEC cycle. The following mediums were analysed: ammonia, R32, R41, R404a, R407c, R410a, R423a, R500, R502, R507a and R114, R152a, R234fa, R600, R1234yf, R1234ze. Analogous assumptions were adopted as in the ORC cycle with heat regeneration for dry refrigerants without regeneration for wet refrigerants. Each of them...

• The Medieval Low Countries

  Czasopisma

  ISSN: 2295-3493

• Low-coherence method of hematocrit measurement

  Publikacja

  • M. Szczerska
  • M. Gnyba
  • M. Kruczkowski

  - Rok 2011

  During the last thirty years low-coherence measurement methods have gained popularity because of their unique advantages. Low-coherence interferometry, low-coherence reflectometry and low-coherence optical tomography offer resolution and dynamic range of measurement at the range of classical optical techniques. Moreover, they enable measurements of the absolute value of the optical path differences, which is still an unsolved problem...

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• Flow Maps and Flow Patterns of R1233zd(E) in a Circular Minichannel at Low, Medium and High Values of Saturation Pressure

  Publikacja

  • S. Głuch
  • M. Pysz
  • D. Mikielewicz

  - Rok 2023

  There is a gap in knowledge regarding the flow pattern of low-boiling working fluids in the range of high saturation temperatures (above 120°C) and medium and high reduced pressures (0.5-0.9). Data are present in the literature for similar values of reduced pressures, but for lower values of saturation temperature. This is due to the existing refrigeration applications of these working fluids. At high values of reduced pressure,...

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• Low-Voltage Low-Power Filters with Independent ω0 and Q Tuning for Electronic Cochlea Applications

  Publikacja

  • W. Jendernalik
  • J. Jakusz
  • G. Blakiewicz

  - Electronics - Rok 2022

  An acoustic second-order low-pass filter is proposed for filter banks emulating the operation of a human cochlea. By using a special filter structure and an innovative quality (Q)-factor tuning technique, an independent change of the cutoff frequency (ω0) and the Q-factor with unchanged gain at low frequencies is achieved in this filter. The techniques applied result in a simple filter design with low Q-factor sensitivity to component...

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• Wpływ właściwości czynników chłodniczych na straty egzergii w pompie ciepła (Influence of Refrigerants Properties for Exergy Losses in Heat Pump)

  Publikacja

  • T. Muszyński
  • R. Andrzejczyk
  • B. Jakubowska

  - Ciepłownictwo, Ogrzewnictwo, Wentylacja - Rok 2016

  Artykuł poświęcony jest wpływowi występujących w pompie ciepła strat egzergii na jej efektywność energetyczną, a co za tym idzie koszty funkcjonowania instalacji. Autorzy prezentują tu metodologię obliczeniową, która może być zastosowana w procesach projektowania układów cieplno-przepływowych. Obliczenia zostały wykonane na podstawie typowego układu powietrznej pompy ciepła pracującej w klimacie środkowo-europejskim. Ponadto w...

• Endometrioid stromal sarcoma, low grade - Female, 74 - Tissue image [6180730013786841]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of CORPUS UTERI tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Endometrioid stromal sarcoma, low grade - Female, 74 - Tissue image [6180730013783131]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of CORPUS UTERI tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Endometrioid stromal sarcoma, low grade - Female, 74 - Tissue image [6180730013783241]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of CORPUS UTERI tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Endometrioid stromal sarcoma, low grade - Female, 74 - Tissue image [6180730013782931]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of CORPUS UTERI tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Endometrioid stromal sarcoma, low grade - Female, 74 - Tissue image [6180730013784491]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of CORPUS UTERI tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Mucinous cystic neoplasm with low grade dysplasia - Female, 40 - Tissue image [7040247104932011]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of PANCREAS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Mucinous cystic neoplasm with low grade dysplasia - Female, 40 - Tissue image [6300730028253261]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of PANCREAS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Mucinous cystic neoplasm with low grade dysplasia - Female, 40 - Tissue image [630073002825231]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of PANCREAS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Journal of Low Power Electronics

  Czasopisma

  ISSN: 1546-1998 , eISSN: 1546-2005

• Healthcare in Low-resource Settings

  Czasopisma

  ISSN: 2281-7824

• International Journal of Low Radiation

  Czasopisma

  ISSN: 1477-6545

• Early Modern Low Countries

  Czasopisma

  eISSN: 2543-1587

• JOURNAL OF LOW TEMPERATURE PHYSICS

  Czasopisma

  ISSN: 0022-2291 , eISSN: 1573-7357

• LOW NOISE TIRES FOR HYBRID AND ELECTRIC VEHICLES

  Publikacja

  • J. Ejsmont
  • B. Świeczko-Żurek
  • S. Taryma

  - Rok 2014

  Low Emission Vehicles that are hybrid and electric cars may benefit from specially designed tires that are optimized for driving conditions typical for such vehicles. It is possible that in the future Low Emission Vehicles, especially passenger cars, will substitute conventional vehicles in all applications, however for the time being they are mostly used in urban and suburban areas. Urban traffic has a rather low demand for grip...

• Low grade serous carcinoma - Female, 58 - Tissue image [10010729534339021]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of OVARY tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Low grade serous carcinoma - Female, 58 - Tissue image [10010729534326341]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of OVARY tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Novel Low-Loss Substrates for 5G Applications

  Publikacja

  • K. Babicki
  • A. Lamęcki
  • M. Mrozowski
  • M. Baranowski
  • A. Wroblewska
  • M. Zdrojek
  • B. Salski
  • J. Krupka

  - Rok 2022

  This paper presents a feasibility study of a new type of microwave low-loss dielectric substrates for 5G network applications. The new substrate materials are composites of polypropylene and high-dielectric-constant micro-ceramics. This combination is expected to form a very low-loss dielectric material at low fabrication cost. Two substrate samples with different dielectric properties are fabricated and their characteristics at...

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• Multilocular cystic renal neoplasm of low malignant potential - Male, 42 - Tissue image [617073002674451]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of KIDNEY tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Multilocular cystic renal neoplasm of low malignant potential - Male, 42 - Tissue image [6170730026743851]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of KIDNEY tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Multilocular cystic renal neoplasm of low malignant potential - Male, 42 - Tissue image [6170730026745981]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of KIDNEY tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Multilocular cystic renal neoplasm of low malignant potential - Male, 42 - Tissue image [6170730026749991]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of KIDNEY tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Intraductal papillary mucinous neoplasm with low grade dysplasia - Male, 72 - Tissue image [3300730069458321]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of PANCREAS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Intraductal papillary mucinous neoplasm with low grade dysplasia - Male, 72 - Tissue image [11020630022694071]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of PANCREAS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Intraductal papillary mucinous neoplasm with low grade dysplasia - Male, 72 - Tissue image [11020630022699761]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of PANCREAS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Intraductal papillary mucinous neoplasm with low grade dysplasia - Male, 72 - Tissue image [11020630022693501]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of PANCREAS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Intraductal papillary mucinous neoplasm with low grade dysplasia - Male, 72 - Tissue image [11020630022694241]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of PANCREAS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Intraductal papillary mucinous neoplasm with low grade dysplasia - Male, 72 - Tissue image [11020630022694651]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of PANCREAS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Intraductal papillary mucinous neoplasm with low grade dysplasia - Male, 72 - Tissue image [3300730069455341]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of PANCREAS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Intraductal papillary mucinous neoplasm with low grade dysplasia - Male, 72 - Tissue image [11020630022693991]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of PANCREAS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Intraductal papillary mucinous neoplasm with low grade dysplasia - Male, 72 - Tissue image [11020630022696911]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of PANCREAS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.

• Voltage Conditions in Low Voltage Grid with Connected Mictogeneration

  Publikacja

  • R. Kowalak

  - Acta Energetica - Rok 2017

  The introduction of distributed generation into a low voltage grid may cause voltage problems in it. The paper discusses the effect of microgeneration on voltage levels in a low voltage grid. A real low voltage grid of considerable length was selected for the analysis. The grid primarily supplies residential buildings in a rural area. Results of tests that consider potential measures which could be applied in this grid to improve...

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• The use of low-coherence interferometer for sugar content determination

  Publikacja

  • M. Szczerska

  - Rok 2015

  In this article, the implementation of low-coherence interferometer with signal processing in time domain for sugar content determination in aqueous solution is presented. The elaborated measurement set-up was tested with the use of synthesized source made of two low-coherence sources. The use of two sources with dedicated parameters enabled to obtain a proper metrological parameters of the measurement system. The elaborated low-coherence...

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• Evaluation of Low Temperature Properties of Rubberized Asphalt Mixtures

  Publikacja

  • M. Pszczoła
  • M. Jaczewski
  • C. Szydłowski
  • J. Judycki
  • B. Dołżycki

  - Procedia Engineering - Rok 2017

  The paper presents low-temperature test results of asphalt mixtures designed with use of bitumen modified by crumb rubber and also SBS polymer. Laboratory tests were conducted on two types of asphalt mixtures for wearing course – stone matrix asphalt (SMA 8) and porous asphalt (PA 8). This paper presents results of the following laboratory tests at low temperatures: TSRST test, three point bending creep test, fracture toughness...

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• Low-Cost Surrogate Models for Microwave Filters

  Publikacja

  • N. Leszczynska
  • I. Couckuyt
  • T. Dhaene
  • M. Mrozowski

  - IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS - Rok 2016

  A novel low-cost kriging-based multivariable parametric macromodeling technique for microwave filters is presented. Kriging is used to model both the residues and poles of a microwave filter's reflection coefficient, and the zeros of the transmission coefficient. The proposed residue-pole-zero (RPZ) technique is demonstrated to efficiently model a high dimensional (8D) microwave filter with pseudoelliptic characteristics.

  Pełny tekst do pobrania w serwisie zewnętrznym

• Endometrial stromal sarcoma, low grade - Female, 52 - Tissue image [6120730031839801]

  Dane Badawcze

  open access

  • Gdański Uniwersytet Medyczny

  This is the histopathological image of CORPUS UTERI tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 1000 slide scanner (20x magnification) and saved to DICOM format.