Water inlet and outlet temperature

Cooling water inlet and outlet temperatures are 80 and lOS F, respectively. The condenser heat transfer area is 1000 ft. The cooling water pressure drop through the condenser at design rate is 5 psi. A linear-trim control valve is installed in the cooling water line. The pressure drop over the valve is 30 psi at design with the valve half open. 

Specify operating conditions, i.e., water inlet and outlet temperatures and the inlet air wet-bulb temperature. 

The reactor system used for these experiments is a 190 liter, jacketed/ stainless steel vessel equipped with initiator and emulsifier metering system. The reactor is monitored and controlled by a minicomputer. The computer monitors the reactor temperature and pressure/ the jacket water inlet and outlet temperatures and flow rate, and the initiator and emulsifier flow rates. The computer calculates the amount of heat transferred through the jacket from the process measurements and transmits signals to control the reactor temperature and metering pumps. 

Figure 1. Jacket water inlet and outlet temperatures in response to a —33°C (Test II) change in the inlet. The response of the jacket outlet temperature typifies a first-order mixing model.

In Eq. (3.2), cooling water inlet and outlet temperatures are assumed to be 90°F and 120°F, respectively, and is the reflux dmm temperature in °F. With a known heat transfer area, the installed cost of the condenser can be calculated by using the following formula taken from Appendix E of Douglas ... 

A.2. Determine how the controlled variables can be measured or inferred and identify other process variables to be measured. The schematic fiow diagram in Fig. H.3 also shows the locations of the most important sensors/transmitters. In addition to measurements for the controlled variables, actual plants are routinely provided with many additional, but less important, measurements. Measurements such as cooling water inlet and outlet temperatures on the reactor cooling coil and heat exchanger steam supply pressure are required to... 

Let us consider a cooler in the equipment flow sheet. The required rate of heat removal is known from the balances, and the rate of cooling water can be calculated once the inlet and outlet temperatures of the water have been specified. The calculation of the consumption of other utilities is also straightforward. Allowances should be made for wastage. 

There is a requirement to cool 200,000 kg/h of a dilute solution of potassium carbonate from 70 to 30°C. Cooling water will be used for cooling, with inlet and outlet temperatures of 20 and 60°C. A gasketed-plate heat exchanger is available with the following specification ... 

A cooling tower supplies water to a cooling water network at 25°C. The maximum inlet and outlet temperatures for the three cooling duties together with their flowrates are given in Table 24.6. 

The origins of the household appliance industry date back to the early decades of the last century, when simple tasks were transferred to household appliances. For example, in an early washing machine of the thirties, the water inlet and outlet as well as water motion and heating were controlled, while all other functions required were carried out manually. Refrigerators only provided the cooling power or the low temperature. In the forties of the last century, the first vacuum cleaners came on the market. 

Water inlet and outlet. These are often connected to temperature-controlled water recirculating baths. The prisms and your samples in the prisms can all be kept at the temperature of the water. 

Water is heated by passing it through a steam-heated kettle (Fig. 7.78) at a mass flowrate w. The inlet and outlet temperatures of the water are 9, and 9 respectively. Steam condenses in the jacket of the kettle at a temperature 0, and a pressure f. It is intended to control the temperature of the water by placing a temperature sensor in the water in the kettle and using this measurement to manipulate the flow of steam to the kettle jacket. In order to tune the controller it is necessary to derive the transfer functions relating 0o to 0j, 0, and w. 

Germani et al. [82] wash-coated Cu/ZnO catalyst on to micro channels and compared their performance with that of conventional monoliths for the low-temperature water-gas shift. Up to six plates could be put into a stack-like reactor heated by cartridges, which had a maximum operation temperature of600 °C (see Figure 2.47). The reactor had capabilities for measuring the inlet and outlet temperature of the gases via thermocouples. 

Buckingham, R., et al. (2009), Influence of HTR Core Inlet and Outlet Temperatures on Hydrogen Generation Efficiency Using the Sulphur-iodine Water-splitting Cycle , these proceedings. 

Influence of HTR core inlet and outlet temperatures on hydrogen generation efficiency using the sulphur-iodine water-splitting cycle... 

A simple but common heat exchanger application in a chemical process plant is cooling a hot liquid or gas product from the process (called the process fluid ) to a temperature low enough that it can be safely stored. The coolant is likely to be air or water, which would be heated in the heat exchanger. If none of the fluids involved reach their boiling or condensing temperatures, no phase change occurs, and the process fluid is sensibly cooled and the coolant sensibly heated. A heat balance relates the inlet and outlet temperatures, the specific heats, and the mass... 

Hydrocarbon vapor is being condensed, using water in the tube side of a 1-2 exchanger, with no temperature cross (Fig. 2). The condensing curve is broken into three zones. In each zone, the temperature differences for the hot side and cold side are calculated, as can be seen in the table. Ibmperatures and heat duties can be read directly fi om Fig. 2. Notice, however, in the table that for the cold side, the inlet and outlet temperatures (85° and 115°F, respectively) are used for each zone. In multiple-tube-passes situations, this approximation provides a sufidciently good approach-temperature reading. 

Hot water at 60°C is cooled to 36 C through the tube side of a 1-shell pass and 2-tube passes heat exchanger. The coolant is also a water stream, for which the inlet and outlet temperatures ate 7°C and SIX, respectively. The overall heat transfer coefficient and the heat transfer area arc 950 W/m K and 15 m , respectively. Calculate the mass flow rates of hot and cold water streams in steady operation. 

To calculate the logarithmic-mean temperature difference, the terminal temperatures of the condenser must be fixed. Because the condensation is essentially isobaric, the inlet and outlet temperatures of the ammonia stream are 41.4°C (106.5 °F). From Table 4.1, the inlet cooling-water temperature is 30°C (86.0 °F) if cooling-tower water is used. Also, for thermodynamic considerations the exit water temperature must be less than 41.4°C, and it is calculated from Equation 4.7.6. If the lower value of the approach temperature difference of 5 °C (9.0 °F) is selected from Table 4.4, a low cooling-water flow rate will be needed. Thus, exit water temperature is 36.4°C. Therefore, from Equation 4.7.5, the logarithmic-mean temperature difference,... 

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