Results 1 to 10 of about 7,149 (164)

Thermodynamic performance assessment and application feasibility analysis of small heat pump water heater using CO2/R41 azeotropy mixture as refrigerant for sustainable development

open access: yesFrontiers in Energy Research, 2023
In order to improve the application possibility of CO2/R41 azeotropy mixture in the refrigeration industry, the optimum mass ratio of composition is defined and determined according to the thermodynamic properties and safety.
Yuehong Lu
exaly   +4 more sources

Small Business Grants Awarded by the National Institutes of Health for Rhinologic Diseases, 1985-2024. [PDF]

open access: yesInt Forum Allergy Rhinol
International Forum of Allergy &Rhinology, Volume 16, Issue 5, Page 512-515, May 2026.
Birkenbeuel J   +7 more
europepmc   +2 more sources

An investigation to identify the performance of cascade refrigeration system by adopting high-temperature circuit refrigerant R1233zd(E) over R161

open access: yesInternational Journal of Thermofluids, 2023
In this work, the refrigerant R1233zd(E) (A1 ASHRAE safety code) is investigated for the possible substitution of refrigerant R161 (A2 ASHRAE safety code) in a cascade refrigeration system. The high-temperature circuit refrigerant R1233zd(E) is evaluated
Vivek K. Patel   +4 more
doaj   +1 more source

Parametric analysis and optimization of a novel cascade compression-absorption refrigeration system integrated with a flash tank and a reheater

open access: yesResults in Engineering, 2023
This article presents a novel cascade configuration for a compression absorption refrigeration system by combing a single effect absorption cycle with a reheater at the higher temperature circuit (HTC) and a modified vapor compression cycle with the ...
Md Walid Faruque   +3 more
doaj   +1 more source

Transport in times of an epidemic: public transport measures in the Czech Republic and its regions

open access: yesReview of Economic Perspectives, 2021
In the first half of 2020, the global pandemic of the COVID-19 virus became a phenomenon affecting all spheres of human life. Measures against the spread of the virus have led to restrictions in life in public spaces and have also affected the transport ...
Vrána Martin   +3 more
doaj   +1 more source

Travel behaviour changes during the pandemic: Prague-Pilsen rail case study

open access: yesReview of Economic Perspectives, 2022
The COVID-19 pandemic has affected many aspects of our everyday lives. Governments have taken numerous measures to contain the spread of the pandemic, which has had a direct impact on daily mobility, modal choice and the function of public transport ...
Surmařová Simona   +2 more
doaj   +1 more source

Comprehensive evaluation on the thermal-hydraulic performance of supercritical CO2/R41 in a micro-fin tube

open access: yesThermal Science, 2022
A 3-D flow and heat transfer theoretical model was established for a 5 mm micro-fin tube to explore the heat transfer and flow characteristics of supercritical CO2/R41 therein under different pressures, mass fluxes, and components. The research attempts to provide reference for selecting components of working media and setting the pressure and mass ...
Ruoyu Dai   +4 more
openaire   +1 more source

A new zenith-looking narrow-band radiometer-based system (ZEN) for dust aerosol optical depth monitoring [PDF]

open access: yesAtmospheric Measurement Techniques, 2017
A new zenith-looking narrow-band radiometer based system (ZEN), conceived for dust aerosol optical depth (AOD) monitoring, is presented in this paper. The ZEN system comprises a new radiometer (ZEN-R41) and a methodology for AOD retrieval (ZEN-LUT).
A. F. Almansa   +8 more
doaj   +1 more source

Analysis of Security Criteria for IoT-Based Supply Chain: A Case Study of FMCG Industries

open access: yesCentral European Management Journal, 2021
Purpose: In supply chains, creating a secure space for data production, sending, storing, and analysis has always been a critical issue. The main goal of this research was to evaluate the importance of various security criteria in an intelligent supply ...
Nozari Hamed   +3 more
doaj   +1 more source

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