APC implementation in Chandra Asri – ethylene plant

2017 ◽  
Author(s):  
Mochamad Sidiq ◽  
Ali Mustofa
Keyword(s):  
Ethylene Plant

Data-driven adaptive robust optimization for energy systems in ethylene plant under demand uncertainty

2021 ◽  
pp. 118148
Author(s):  
Feifei Shen ◽  
Liang Zhao ◽  
Meihong Wang ◽  
Wenli Du ◽  
Feng Qian
Keyword(s):  
Robust Optimization ◽  
Demand Uncertainty ◽  
Energy Systems ◽  
Data Driven ◽  
Ethylene Plant

Simulation of quench system of ethylene plant using real components

2008 ◽  
Vol 86 (9) ◽  
pp. 1049-1052 ◽  
Author(s):  
Gao Guangying ◽  
Quan Xianliang ◽  
Jiang Bin ◽  
Li Xingang
Keyword(s):  
Ethylene Plant

scholarly journals Aphid-Induced Defense Responses in Mi-1-Mediated Compatible and Incompatible Tomato Interactions

2003 ◽  
Vol 16 (8) ◽  
pp. 699-708 ◽  
Author(s):  
Oscar Martinez de Ilarduya ◽  
QiGuang Xie ◽  
Isgouhi Kaloshian
Keyword(s):  
Proteinase Inhibitors ◽  
Induced Defense ◽  
Defense Responses ◽  
Root Knot Nematode ◽  
Resistance Response ◽  
Potato Aphid ◽  
Ethylene Plant ◽  
Aphid Feeding ◽  
Transcript Profiles ◽  
Incompatible Interactions

The tomato Mi-1 gene confers resistance to three species of root-knot nematode and potato aphid. We studied changes in expression of jasmonic acid (JA)- and salicylic acid (SA)- dependent defense genes in response to potato and green peach aphids. We determined changes in three PR proteins, lipoxygenase and proteinase inhibitors I and II transcripts, locally and systemically in both compatible and incompatible interactions in tomato. Transcripts for PR-1 were detected earlier and accumulated to higher levels in the incompatible than in the compatible potato aphid/tomato interactions. The transcript profiles of the other genes were similar in compatible compared with incompatible interactions. Pin1 and Pin2 RNAs were detected early and transiently in both compatible and incompatible interactions. In tomato plants containing Mi-1, systemic expression of PR-1 and GluB was detected in both compatible and incompatible interactions at 48 h after infestations with either aphid. These results suggest that aphid feeding involves both SA and JA/ethylene plant defense signaling pathways and that Mi-1-mediated resistance might involve a SA-dependent signaling pathway. Potato aphid feeding generated reactive oxygen species in both compatible and incompatible interactions. However, a hypersensitive response was absent in the Mi-1-mediated resistance response to potato aphids. Reciprocal grafting experiments revealed that resistance is cell autonomous, and local expression of Mi-1 is required for Mi-1-mediated resistance against the potato aphid.

scholarly journals Mathematical modeling of a multi-stream brazed aluminum plate fin heat exchanger

2010 ◽  
Vol 14 (1) ◽  
pp. 103-114 ◽  
Author(s):  
Ahmed Kohil ◽  
Hassan Farag ◽  
Mona Ossman
Keyword(s):  
Sensitivity Analysis ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Inlet Temperature ◽  
Outlet Temperature ◽  
Ethylene Plant ◽  
Inlet Flow Rate ◽  
Cold Stream ◽  
Inlet Conditions ◽  
Good Agreement

The need for small size and lightweight heat exchangers in many applications has resulted in the development of many heat transfer surfaces. This type of heat exchanger is much more compact than can be practically realized with circular tubes. In this work a steady-state mathematical model that representing one of the plate fin heat exchangers enclosed in cold box of an ethylene plant has been developed. This model could evaluate the performance of the heat exchanger by predicting the outlet temperatures of the hot and cold streams when the inlet conditions are known. The model has been validated by comparing the results with actual operating values and the results showed good agreement with the actual data. Sensitivity analysis was applied on the model to illustrate the main parameters that have the greatest influence on the model calculated results. The sensitivity analysis showed that the hot stream outlet temperature is more sensitive to cold streams inlet temperatures and less sensitive to hot stream inlet temperature and thermal resistance (fouling), while the cold stream outlet temperature is more sensitive to cold streams inlet flow rate and less sensitive to fouling.

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