Hot gas temperature

Cooler hot gas temperature high Cooler cold gas temperature high Common cold gas temperature high Machine gas temperature high... 

Figure 5. Comparison of experimental and calculated hot gas temperatures in four different experimental setups. Continued on next page.

While the control structure proposed in Fig. 5.16 satisfies the basic demands of heat management, it is not a scheme we would recommend building. First, we have reservations about the design of the recycle column reboiler and its hot bypass. As shown in Fig. 5.16, the hot gas temperature is over 4253C. When we add the fact that the operating pressure is close to 500 psia and that the stream contains mostly methane and hydrogen, we have to wonder how to design the reboiler and its bypass valve so they will operate safely and reliably. 

I Reconsider Prob. 5-55. Using EES (or other) I software, investigate the effects of hot-gas temperature and the outer surface emissivity on the lempeiatures at the outer corner of the wall and the middle of the inner surface of tlie right wall, and the rale of heat loss. Let the temperature of the hot gases vary from 200°C to 400 C and the emissivity from 0.1 to 1.0. Plot the temperatures and the rate of heat loss as functions of the temperature of the hot gases and the emissivity, and discuss the results. 

Hot gas temperature 180 to 950°C or cryogenic conditions 80 to 180 kPa absolute. Usually used to recover waste heat. For pebble beds, temperatures up to 1700°C. Nominal gas flow rate to one side, 0.6 to 20 mVs. 

Direct convection options for temperatnre-sensitive, moderately sensitive, and insensitive solids [10 < r < 150°C]. Hot gas temperature 550 to 800°C... 

Air flows required at the burner for meeting the appropriate hot gas temperatures in the various zones are nearly five times that required for operation in reforming mode at rated power. 

Study the effect of hot gas temperature, gas hourly space velocity, adjacent environments, and flow patterns (adjacent zones with co- or counter-current flow, parallel vs. series heating, etc.) on the heatup rates. 

The fast-start test reactor will be used to determine the effect of hot gas temperature, gas hourly space velocity, adjacent environments, and flow patterns on the heat-up rates of catalysts and materials. The temperature progression within the reactor will be a function of the effectiveness of heat transfer between the hot gas and the catalyst. Variations in flow patterns that will drive the design of a fast-start processor include the effect of counter-current versus co-current flow of the gas streams in adjacent zones and of heating the zones in series versus parallel. The temperature distributions in adjacent zones will determine the insulation... 

After this example, the reader is encouraged to revisit the Example 3.4 and reformulate it as an optimisation problem. We suggest as objective function the sale value of the total LNG and LPG produced. Optimisation variables could be the outlet hot gas temperature after the cold box, as well as the pressure after expander. 

Ny varies generally with hot gas temperature, solid gas ratio, and gas velocity. Therefore, suitable drying tube volume must be calculated on the basis of the equation of heat transfer and heat balance. Ny gives the approximate value of the drying tube volume. The drying rate per unit volume is defined by... 

There Is also a certain connection between the efforts to bring down the Investment costs and the considerations and exertions for the development of C02 gas turbines aimed at the realization of a direct circuit, which could obviously be utilized as well for a COg cooled heavy water reactor. Hot gas temperatures in the range of 500°C which. In connection with zirconium-copper as cladding may be regarded today as quite realistic, would result In a rather Interesting overall efficiency of a plant. The most attractive point, however, in connection with a process based on an expansion to not less than about 80 kg/cm -the kind of process we would prefer - Is given by the remarkably small dimensions of the CO2 turbines of such a plant. 

Joints are weakened by incomplete softening, oxidation and thermal degradation of plastic material. Process variables are hot gas temperature, pressure (either from filler rod or fixtures) and speed of welding. 

The non-invasive requirement for the hot leg temperature sensor must therefore be evaluated against impacts on reactor control response time. Other factors affecting sensor placement include sensor accuracy and resolution, temperature tolerance, sensor size, and feasible attachment methodologies. The sensor technologies under consideration for measuring the hot gas temperature were ultrasonics, thermocouples, resistance temperature deviees (RTDs), optical pyrometry, and fiber Bragg grating. 

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