The water is at the pressure of 0.22 bar and temperature of 60°C. a) Using data from the table, state if the water is in the condition of subcooled liquid, saturated liquid/steam or superheated steam. I 1.4 b) Calculate the degree of superheating or / subcooling c) What is the boiling point of water at the pressure of 0.22 bar?

3. In an adiabatic cooling tower 500 kg/min hot water, is to be cooled from 50°C to 35°C by using air with 25°C dry bulb temperature and 15°C wet bulb temperature. The air leaves the tower with 32°C dry bulb temperature and 85% relative humidity. a. Show the points of inlet and outlet air on the PSYCHROMETRIC chart given below. Read the followings: Absolute humidity and Relative humidity of the inlet air. Absolute humidity and wet bulb temperature of the exit air. b. Calculate the volumetric flow rate of the air used. c. Why do we use cooling towers in process plant?

4. The right figure shows a simple combustion calorimeter. The sample is ignited electrically. After a few minutes the temperature of the water and calorimeter is constant at AT higher than the starting temperature. Determine the heat of combustion of a sample from the following data: Sample mass Calorimeter mass Water mass 4 g 500 g 5000 g The heat of combustion is defined as = Sample Inlet 0 75 400 Temperature °F 70.0 Cvcalorimeter Cywater Ufinal products of combustion Pressure, psig Elevation, ft Velocity, ft/s AT Stirrer Uinitial fuel+oxygen Au combustion msample 5. A steady-flow water power plant has the following inlet and outlet conditions: Oxygen Outet 0 0 50 70.1 Water Thermometer Heavy steel bomb 0.12 cal/g °C 1.0 cal/g °C 5 °C

2. A piston-cylinder device initially contains 0.8 kg of nitrogen gas at 160 kPa and 240 °C. The nitrogen gas is now expanded to a pressure of 100 kPa isothermally. Determine the work boundary during this process. 3. A frictionless piston-cylinder device contains 6 kg vapor at 600 kPa and 400 °C. When heat is transferred to the system, the vapor temperature is increasing up to 500 °C. Calculate the work net during this heat transfer process.

The rate of heat transfer from a body to the surroundings is governed by the following equation: D= hA(Tsur - Tbody) Where dis the heat transfer rate (J/s) h is the heat transfer coefficient A is the heat transfer area (m²) Tsur is the temperature of the surroundings (K) Tpody, is the temperature of the body (K) Find the units for the heat transfer coefficient, h.

9. SOC high crude oil is to be heated from 15° C to 55° C at the rate of 1,50 ton/h using a stream from the plant. The crude oil is pumped in to the tube and the heating stream is pumped into the shell side of an available heat exchanger. The heating stream enters in to the tube at 150° C and leaves the tube at 110° C. The average properties of both the fluids are given below. The available heat exchanger (1-2 pass) has shell diameter of 23% in. The shell has 324 tubes, ¾ in. OD, BWG 14 (wall thickness), 12 feet long arranged on 1 in. Square pitch and supported by baffles with a 25% cut, spaced at 9 in interval. You need to find the suitability of this exchanger for the purpose. What will be the allowable fouling factor? Heating stream Crude oil cp, J/g. ° C 2.2 2 H, CP 5.2 2.9 P, kg/m3 k, W/m. C 866 822 0.12 0.138

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The results of air temperature measurement obtained a dry bulb temperature of 29 ° C and a wet bulb temperature of 26.5 ° C. Using a psychometric chart, determine the properties of the air as follows:a. Humidityb. Water contentc. Specific volumed. Enthalpye. Condensation temperatureIf the air is in the space of 162 m3, determine:f. Air weight (dry air and moisture)g. The amount of water content in the room