Results 21 to 30 of about 1,952,648 (132)

Flow patterns and heat transfer for flow boiling in small to micro diameter tubes [PDF]

open access: yes, 2008
An overview of the recent developments in the study of flow patterns and boiling heat transfer in small to micro diameter tubes is presented. The latest results of a long-term study of flow boiling of R134a in five vertical stainless steel tubes of ...
Karayiannis, TG   +3 more
core   +6 more sources

Cooling Modelling of an Electrically Heated Ceramic Heat Accumulator

open access: yes, 2022
This paper presents a simple novel mathematical model of a heat accumulator with an arranged packing in the form of ceramic cylinders. The accumulator analysed in the paper can be heated with inexpensive electricity overnight or excess electricity from ...
Jan Taler   +3 more
core   +1 more source

Evaluating the seasonal accumulation of Heat units as an agroclimatic indicator on Baby corn (Zea mays L.) under different sowing windows

open access: yesJournal of Applied and Natural Science, 2023
Temperature determines the plant's growth and development, which decides the onset of different phenophasic stages of the Baby corn. This study aimed to evaluate the phenological behaviour and yield of Baby corn (Zea mays L.) influenced by sowing windows and heat units with the field investigations carried out during winter (January – April) and kharif 
Sankar T   +4 more
openaire   +1 more source

Seasonal COP of an Air-to-Water Heat Pump when Using Predictive Control Preferring Power Production from Renewable Sources in the Czech Republic

open access: yesEnergies, 2019
The paper presents a parametric study evaluating the effects of various predictive controls on the operating parameters of heat pumps. The heat pump represents a significant power appliance in the residential sector.
Jiří Pospíšil   +2 more
doaj   +1 more source

Does heat accumulation alter crop phenology, fibre yield and fibre properties of sunnhemp (Crotalaria juncea L.) genotypes with changing seasons?

open access: yesJournal of Integrative Agriculture, 2021
Abstract Field experiments were carried out in split plot design during the dry and wet seasons for two years (two seasons each in 2016–2017 and 2017–2018) with two genotypes (SH4 and SUIN053), two plant geometry (30×15 cm and 45×15 cm main plots) and three levels of NPK (20 kg N ha−1, 40 kg P ha−1 and 40 kg K ha−1; 20 kg N ha−1, 60 kg P ha−1 and 60 ...
KASIRAJAN Subrahmaniyan   +2 more
openaire   +1 more source

Accumulation of Small Heat-Shock Protein Homologs in the Endoplasmic Reticulum of Cortical Parenchyma Cells in Mulberry in Association with Seasonal Cold Acclimation1 [PDF]

open access: yesPlant Physiology, 1999
Abstract Cortical parenchyma cells of mulberry (Morus bombycis Koidz.) trees acquire extremely high freezing tolerance in winter as a result of seasonal cold acclimation. The amount of total proteins in endoplasmic reticulum (ER)-enriched fractions isolated from these cells increased in parallel with the process of cold acclimation ...
N, Ukaji   +5 more
openaire   +2 more sources

Spatio-temporal reconstruction of air temperature maps and their application to estimate rice growing season heat accumulation using multi-temporal MODIS data [PDF]

open access: yesJournal of Zhejiang University SCIENCE B, 2013
The accumulation of thermal time usually represents the local heat resources to drive crop growth. Maps of temperature-based agro-meteorological indices are commonly generated by the spatial interpolation of data collected from meteorological stations with coarse geographic continuity. To solve the critical problems of estimating air temperature (T(a))
Li-wen, Zhang   +5 more
openaire   +2 more sources

Performance Comparison of the Vapor-Injection Cycle in Terms of Branching Points of the Injection Stream [PDF]

open access: yes, 2012
The performance of the two types of vapor-injection (VI) cycles in a heat pump system is compared. The vapor-injection cycle using an internal heat exchanger (IHX) has a choice to select the branching point of the injection stream.
Kim, Min Soo, Roh, Chul Woo
core   +1 more source

Skillful Seasonal Predictions of Boreal Winter Accumulated Heating Degree-Days and Relevance for the Weather Derivative Market [PDF]

open access: yesJournal of Applied Meteorology and Climatology, 2013
AbstractIt is demonstrated that boreal winter accumulated heating degree-days, a weather derivative product that is frequently demanded by energy suppliers (among others), can be skillfully predicted with a lead time of 1 month, that is, at the beginning of the previous November, for many regions of the Northern Hemisphere extratropics.
openaire   +2 more sources

Improving the energy efficiency of a solar air heater with heat accumulator using flat reflectors [PDF]

open access: yes, 2023
In the article, the authors researched the process of increasing the energy efficiency of the solar air heating collector with heat accumulator. In order to increase the energy efficiency of the solar air heating collector with a heat accumulator, it was
Safarova Setora   +2 more
core   +3 more sources

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