Key energy indicator

How would one make the concept of key energy indicators working for a process unit or the company Let us use the example of the debutanizer for the hydrocracking unit aforementioned. 

A few typical nitrogen-nitrogen bonds are briefly examined. The key is in the result obtained from dimethylamine, leading to RECCHsNH ) = 9.19 kcal/mol. With AHf° (CHsNH ) = 43.6 3 kcal/mol [246] and ZPE + Hr Hq = 31.7S, kcal/mol [139], we get AE/= 471.54 kcal/mol for this radical hence Dcn = 89.27 kcal/ mol for dimethylamine, and thereby the reorganizational energy indicated above. 

Draw a realistic sketch of the physical system involved, and list the relevant information on the figure. The sketch does not have to be sometliing elaborate, but it should resemble the actual system and show the key features. Indicate any energy and mass interactions witli the suiroundings. Listing the given information on the sketch helps one to see the entire problem at once. 

QuaSAR descriptors [QuaSAR - Chemical Computing Group, Inc., 2007] include several types of traditional molecular descriptors Kier-Hall —> connectivity indices, —> structural keys. Estate indices, descriptors of physico-chemical properties (such as log P, molecular weight and molar refractivity), 3D molecular features (such as potential energy descriptors, surface area, volume and —> shape descriptors, conformation dependent partial charge descriptors), and some pharmacophore-based descriptors. 

The energy conversion efficiency is one of the key performance indicators of the PEC cell. Assuming that all the photogenerated electrons and holes are used for the water splitting reaction, the overall solar-to-hydrogen efficiency is given by... 

The truth of the matter is that there is large room for energy efficiency improvement. To find out the truth, you may ask a few questions What metrics are applied to measure the process energy efficiency What energy indicators are defined for the key equipment How do you set up targets for these indicators ... 

To evaluate the technical and economic performance of membrane based CO2 capture, the authors have chosen as key performance indicators (KPIs) the specific energy consumption (eqn (7.1)), the total membrane area (eqn (7.2)) and the specific CO2 avoidance costs (eqn (7.3)). 

Figure 2.14. The molecular orbitals of gas phase carbon monoxide, (a) Energy diagram indicating how the molecular orbitals arise from the combination of atomic orbitals of carbon (C) and oxygen (O). Conventional arrows are used to indicate the spin orientations of electrons in the occupied orbitals. Asterisks denote antibonding molecular orbitals, (b) Spatial distributions of key orbitals involved in the chemisorption of carbon monoxide. Barring indicates empty orbitals.5 (c) Electronic configurations of CO and NO in vacuum as compared to the density of states of a Pt(lll) cluster.11 Reprinted from ref. 11 with permission from Elsevier Science.

---