scholarly journals Comparative Exergy Analysis of Units for the Porous Ammonium Nitrate Granulation

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 280
Author(s):  
Dmytro Levchenko ◽  
Andrii Manzharov ◽  
Artem Artyukhov ◽  
Nadiya Artyukhova ◽  
Jan Krmela
Keyword(s):  
Ammonium Nitrate ◽  
Exergy Analysis ◽  
Evaporative Cooling ◽  
Energy Resources ◽  
Unit Mass ◽  
Brayton Cycle ◽  
Basic Scheme ◽  
Target Parameter ◽  
Effective Implementation ◽  
Nitrate Production

The article deals with the study on the efficiency of units for porous ammonium nitrate production. The ways which increase the effective implementation of energy resources are determined by including the ejector recycling module, heat and mass exchangers that utilize principles of regenerative indirect evaporative cooling, and the sub-atmospheric inverse Brayton cycle. Mixed exergy analysis evaluates all flows of the system contour as those of the same value. The target parameter for determining the efficiency of both systems is the ratio of the unit’s productivity to the exergy expenditures to produce the unit mass of the product. As a result, it is found that the mentioned devices and units enable to increase the efficiency of the basic scheme by 87%.

scholarly journals Sensitivity of Nitrate Aerosol Production to Vehicular Emissions in an Urban Street

Atmosphere ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 212 ◽  
Author(s):  
Minjoong J. Kim
Keyword(s):  
Ammonium Nitrate ◽  
Nox Emissions ◽  
Vehicular Emissions ◽  
Street Canyons ◽  
Urban Streets ◽  
Urban Street ◽  
Nitrate Production ◽  
Volatile Organic ◽  
Computational Fluid Dynamics Cfd ◽  
Nitrate Aerosol

This study investigated the sensitivity of nitrate aerosols to vehicular emissions in urban streets using a coupled computational fluid dynamics (CFD)–chemistry model. Nitrate concentrations were highest at the street surface level following NH3 emissions from vehicles, indicating that ammonium nitrate formation occurs under NH3-limited conditions in street canyons. Sensitivity simulations revealed that the nitrate concentration has no clear relationship with the NOx emission rate, showing nitrate changes of only 2% across among 16 time differences in NOx emissions. NOx emissions show a conflicting effect on nitrate production via decreasing O3 and increasing NO2 concentrations under a volatile organic compound (VOC)-limited regime for O3 production. The sensitivity simulations also show that nitrate aerosol is proportional to vehicular VOC and NH3 emissions in the street canyon. Changes of VOC emissions affect the nitrate aerosol and HNO3 concentrations through changes in the O3 concentration under a VOC-limited regime for O3 production. Nitrate aerosol concentration is influenced by vehicular NH3 emissions, which produce ammonium nitrate effectively under an NH3-limited regime for nitrate production. This research suggests that, when vehicular emissions are dominant in winter, the control of vehicular VOC and NH3 emissions might be a more effective way to degrade PM2.5 problems than the control of NOx.

Exergy analysis of evaporative cooling to select the optimum system in diverse climates

Energy ◽  
2012 ◽  
Vol 40 (1) ◽  
pp. 250-257 ◽  
Author(s):  
Moien Farmahini-Farahani ◽  
Shahram Delfani ◽  
Jafar Esmaeelian
Keyword(s):  
Exergy Analysis ◽  
Evaporative Cooling ◽  
Optimum System

Exergy analysis of evaporative cooling for reducing energy use in a Malaysian building

Desalination ◽  
2007 ◽  
Vol 209 (1-3) ◽  
pp. 238-243 ◽  
Author(s):  
B.N. Taufiq ◽  
H.H. Masjuki ◽  
T.M.I. Mahlia ◽  
M.A. Amalina ◽  
M.S. Faizul ◽  
...  
Keyword(s):  
Energy Use ◽  
Exergy Analysis ◽  
Evaporative Cooling ◽  
Reducing Energy
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