Heat diagram

Calberg NA and Westerberg AW (1989) Temperature-Heat Diagrams for Complex Columns 2, Underwood s Method for Side-Strippers and Enrichers, Ind Eng Chem Res, 28(9) 1379. 

Given 10,000 Ib/hr of 700°F cycle exhaust gas passing through a heat recovery boiler (HRB) (a) How much 150 psia, 400°F steam can be produced (b) How much heat is transferred from the gas to the steam (c) What is the exhaust temperature of the gas leaving the HRB and (d) Sketch the T-Q (temperature-heat) diagram for the HRB. Assume a gas side mean heat capacity of 0.25 Btu/lb, °F, an evaporator pinch temperature of 30°F, a feedwater temperature of 60°F, and an evaporator drum pressure of 180 psia to allow for pressure losses. 

Carlberg NA, Westerberg AW. Temperature-heat diagrams for complex columns. 2. Underwood s method for side strippers and enrichers. Ind Eng Chem Res 1989 28 1379. 

S diagram the heat diagram for the process. As shown in Fig. 2, on a heat diagram, horizontal lines are reversible isothermal processes, whereas vertical lines are reversible adiabatic (isentropic) processes. 

Sketch a curve representing reversible heating at constant pressure on a heat diagram. 

Terranova, B. E., and Westerberg, A. W. Temperature-Heat Diagrams for Complex Columns. 1. Intercooled/Interheated Distillation Columns, Ind. Eng. Chem. Res. 28, 1374-1379 (1989). 

PRESSURE-HEAT DIAGRAM - Graph of refrigerant pressure, heat and temperature properties. (Mollier s diagram.)... 

The power generation set combined with the CFB may be supplied with live steam of up to ISO bar and 535 °C. Process steam fra process plants, primarily coal gasification, may be extracted fiom the turbine at convenient levels. Figure 7.4 shows an energy/heat diagram typical for a coal-based methanol plant... 

An impression on the reduction of exergy losses can be derived from the temperature-heat-diagram, fig. 4. The bundles in the steam generator are arranged in such a way, that the temperature-heat-lines of the steam cycle fit best to that of the helium cycle. The pintch point temperature difference in design B has also not been changed and therefore is 12 K (not... 

Fig. 4 Potential HTR-GST with an efficiency of 54.5 %, temperature-heat-diagram for the 3-pressure-steam-turbine for the flow sheet of fig 3 the exergy losses of heat transfer are reduced...

Figure 23.17. DSC heating diagram of pure LLDPE, HDPE F600, HDPE2911 and LLDPE/HDPE blends...

Next, we get a dialogue box where you can see the heat diagram and edit it. There are also a number of options to compute the curve and here we refer to the user guide for further discussion. 

Figure 9. Set of DSC heating diagrams for 1,3-two-arm PEO at a heating rate of 5 C/min at different TqS.

Figure 7.30 Ring-type solid oxide fuel cell with metal cell interconnects. The fuel gas comes up the central tube and out over the anode. Air is blown in from the outside over the cathode. After passing over both electrodes the gas streams mix, and the remaining fuel is burnt to provide more heat. (Diagram reproduced by kind permission of Sulzer Hexis Ltd).

The boiling pot is powered by hot water, steam or hot flue gas to degasify the refrigerant from the solution. A typical T-Q (Temperature-Heat) diagram of the evaporation process is shown in Fig. 5.87. From the boUing pot the lean solution is throttled and sprayed in the absorber in order to increase the surface, which absorbs the refrigerant vapors again. 

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