What is the filtering velocity for a haghouse with N compartments?
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What is the filtering velocity for a haghouse with N compartments?
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- What is the principle of operation of vapor absorption system? Why is ammonia water system common? Purpose of water in the ammonia absorption system Which energy does vapor absorption system uses? Piping material of vapor absorption system?The outside design temperatures in the summer inTucson, Arizona, for 2.5% of the time are _________ °Fdry-bulb and ___________ °F wet-bulb.A laboratory space to be maintained at 24oC DB and 50% RH experiences a sensible-cooling load of 42 kW and a latent load of 18 kW. Because the latent load is heavy, the air-conditioning system is equipped for reheating the air leaving the cooling coil. The cooling coil has been selected to provide outlet air at 9 oC and 95% RH. What is (a) the air rate and (b) the temperature of supply air? Air pressure is 101.325 kPa
- Answer the MCQ A grey body is one whose absorptivity a. varies with temperature b. varies with wavelength of the incident radiation c. equal to its emissivity . In a heat exchange, doubling the mass flowrate of a fluid while leaving everything unchanged the temperature change of that fluid will a. decreases by 50% b. increase by 50% c. increases by 100% 6. If a heat exchanger LMTD is zero then heat transfer surface become a. Maximum b. Minimum c. InfinityA batch centrifugal filter having a bowl diameter of 750 mm and a bowl height of 450 mm is used to filter a suspension having the following properties: Liquid, water Temperature, 25°C Concentration of solid in feed, 60 g/L Porosity of cake, 0.835 Density of dry solid in cake, 2000 kg/m' Final thickness of cake, 150 mm Speed of centrifuge, 2000 r/min Specific cake resistance, 9.5 x 1010 ftflb Filter medium resistance, 2.6 x 101Oft-l The final cake is washed with water under such conditions that the radius of the inner surface of the liquid is 200 mm. Assuming that the rate of flow of wash water equals the final rate of flow of filtrate, what is the rate of washing in cubic meters per hour?explain the principle of operation of a cooling tower and neatly sketch section, analyse a crossflow cooling tower.
- Air has a dry ball temperature of 36 "C and a wet-bulb temperature of 22 ° C is initially heated in a heater so that the dry ball temperature increases to 80" C. Then the air is passed through the pile of corn kernels to dry. The air coming out of the corn kernels is at a dry bulb temperature of 55 "C. Then this air is passed to the dehumidifier to reduce its RH to 10%. Draw the path of this air change process on a psychrometric diagram. The rate of airflow through the corn kernels pile and The dehumidifier is 5.0 m / s and the cross-sectional diameter of the pile is 0.7 m.a. Determine the amount of water lost from the corn kernels heap (in grams of water/second) (grams of water/second).b. Determine the amount of water lost from the air when passing through the dehumidifier (in grams of water/second) = (grams of water/second)Show how to solve the heat transfer analysis and show formulas to be used in Evaporation cooling in cooling towers. Subject : Heat TransferIt is proposed to cool oil in a counter-current, concentric tube heatexchanger composed of a thin-walled inner tube of 0.02 m diametercarrying oil and thin-walled, perfectly insulated outer tube of 0.05 mdiameter carrying water. The oil flow rate is 50.0 kg min-1 and it has to becooled from 90°C to 40°C using 60 kg min-1 water at 20°C. Calculate the heat load and the outlet water temperature.
- A completely insulated mixing vessel is designed to deliver water at 60 ⁰Cand atmospheric pressure at a rate of 4 kg/s by mixing two streams of incomingwater in an environment at 25 ⁰C. Saturated steam at atmospheric pressure isinserted on the hot side. Two options are being considered for the cold side: (a)chilled water from the plant at 3 ⁰C or (b) water from the tap at 20 ⁰C (both atatmospheric pressure). 1. Determine the thermal efficiency of each processwhat overall thermal system is this for in reference to part 1 , also could you also use numbers from a source for part 2 and do the calculations that way with actual reliable numbers , to make things easier to understand. And also part 2 is not complete as you need to complete performance optimisation of heat exchangers.Estimate how much collector area and storage capacity would be required for an active solar hot-water system designed to supply the total needs for two four-person families, one living in Manchester, New Hampshire, where the latitude is 44+°N, and the other in Albuquerque, New Mexico, at 35+°N. The heat capacity of water is about 4,200 J/kg°C, and the hot-water supply temperature in both houses is 75°C (140°F). State and justify all additional assumptions made.