Modeling the Production and Uses of Biological Resources from the Viewpoint of Energy Flow in a Rural Village in Sichuan, China

2003 ◽  
Vol 32 (1) ◽  
pp. 47-61 ◽  
Author(s):  
Atsushi Tsunekawa ◽  
Bo Zhu ◽  
Kazuko Abe ◽  
Chie Saito ◽  
Kazuhiko Takeuchi
Keyword(s):  
Energy Flow ◽  
Biological Resources ◽  
Rural Village

Critical energy flow paths for SEA models

1999 ◽  
Author(s):  
Ed O'Keefe ◽  
Matt Berge
Keyword(s):  
Energy Flow ◽  
Critical Energy ◽  
Flow Paths

TO THE 100th ANNIVERSARY OF THE BIRTH OF THE PROFESSOR DAVID EFIMOVICH GERSHANOVICH (1920–2007)

2020 ◽  
Vol 48 (4) ◽  
pp. 160-164
Author(s):  
L. L. Demina ◽  
V. V. Gordeev
Keyword(s):  
Science And Technology ◽  
100Th Anniversary ◽  
Shirshov Institute ◽  
Executive Editor ◽  
Biological Resources

The article is dedicated to the 100th anniversary of Professor D.E. Gershanovich, Doctor of Geological and Mineralogical Sciences, Honored Worker of Science and Technology of the Russia, Chief Researcher and Advisor to the Shirshov Institute of Oceanology of Russian Academy Sciences, Executive Editor of the Series “Biological resources of the hydrosphere and their use.”

Energetic Asymmetry Connected with Energy Flow Changes in Response to Eutrophication: A Study of Multiple Fish Species in Subtropical Shallow Lakes

2020 ◽  
Vol 67 (4) ◽  
pp. 305
Author(s):  
Hong Fu ◽  
Huan Zhang ◽  
Liang He ◽  
Yongcui Sha ◽  
Kangshun Zhao ◽  
...  
Keyword(s):  
Fish Species ◽  
Shallow Lakes ◽  
Energy Flow ◽  
Flow Changes

Considerations about mass and energy flow in discontinuous evaporating crystallizers

2016 ◽  
pp. 514-516
Author(s):  
Martin Bruhns
Keyword(s):  
Energy Flow ◽  
Static Pressure ◽  
Bubble Formation ◽  
Boiling Temperature ◽  
Vapor Bubbles ◽  
Local Pressure ◽  
Heating Steam ◽  
Flow Changes ◽  
Local Superheating ◽  
Local Supersaturation

The massecuite circulates in a loop within the evaporating crystallizing vessel. The massecuite flows upwards through the heating tubes. In the room above the calandria the massecuite flow changes its direction to radial inwards and then to vertical downwards. An impeller in the central tube forces the circulation. Below the calandria the main direction of flow is radially outwards until threads of the massecuite stream enter the heating tubes in upwards direction. Within the tubes heat is transferred to the massecuite. At low temperature differences between heating steam and massecuite and higher levels of the massecuite in the crystallizer vapor bubbles are not found in the tubes. Vapor bubbles can be formed at a massecuite level in the crystallizer where the temperature of the massecuite is higher than the local boiling temperature of water, which depends on the local pressure (including the static pressure of the massecuite at this point) and the boiling point elevation of the mother liquor. The surface tension of the liquid is a resistance against the bubble formation, which has to be overcome by the local superheating i.e. the part of the enthalpy of the massecuite exceeding the local boiling temperature. The formation and the flow of the bubbles change the density of the massecuite/bubbles mixture and has an influence on the massecuite flow. The formation of a vapour bubble is connected with a local drop of the massecuite temperature which changes the local supersaturation. Today the heat transfer into the magma is quite well known but the process of bubble formation is quite unknown. Some basic considerations about the formation of bubbles and its influence on local supersaturation based on calculation of heat and mass balances and models of bubble formation are be given and discussed. Experiments for basic investigations are proposed.

Energy flow analysis of straw-return agricultural modes in the Central Shaanxi Plain

2013 ◽  
Vol 20 (10) ◽  
pp. 1388-1393
Author(s):  
Bi JIANG ◽  
Fa-Qi WU ◽  
Xi-Hui WU ◽  
Ming LI ◽  
Xiao-Gang TONG
Keyword(s):  
Energy Flow ◽  
Flow Analysis ◽  
Energy Flow Analysis ◽  
Straw Return
Sign in / Sign up

Export Citation Format

Share Document