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- Q5/ The following data are given for the space to be air conditioned: Outside design conditions = 43C db, 27C wb Inside design conditions = 25C db, 50% RH Room sensible heat load = 40 kW Room latent heat load = 10 kW By pass factor of cooling coil = 0.2 The return air from the room is mixed with the outside air before entry the cooling coil in the ratio of 3 : 1 by mass. Determine: 1. Supply air flow rate 2. Outside air sensible heat 3. Outside air latent heat 4. Grand total heat 5. Effective room sensible heat factor1) Convert the flow rate of natural gas is = 22.913x106 Sm3/s to m3/s ? Note: the gas export line for transportation of 70 MMSCFD natural gas with a molecular weight of 19.3 relative density of natural gas is 0.67 The ambient temperature is 5°C and the gas viscosity at the average pipeline temperature is 1.1x10-6 cP. The gas inlet temperature is 35°C and pressure is 13.0 MPa (absolute) inside diameter of pipe (190 mm) The total length of pipe is (43 km)B) The air flow to a four cylinder four-stroke engine is 2.15 m³/min. During a test on the engine the following data were recorded: Bore 10.5cm; stroke 12.5cm; engine speed 1200 rpm, torque 150 N.m, fuel consumption 5.5 kg/hr, calorific value of fuel, 43124 kJ/kg, ambient temperature 1-The brake thermal efficiency. and pressure are 20°C and 1.03 barş. Calculate: 2-The brakes mean effective pressure. 3-The volumetric efficiency.
- Problem 02.124 - Car moving through air flow An automobile moving through the air causes the air velocity (measured with respect to the car) to decrease and fill a larger flow channel. An automobile has an effective flow channel area of 3.5 m². The car is traveling at 90 km/h on a day when the barometric pressure is 70 cm of mercury and the temperature is 20°C. Behind the car, the air velocity (with respect to the car) is measured to be 82 km/h, and the temperature is 20°C. Determine the power required to move this car through the air and the area of the effective flow channel behind the car. = Flow channel The power required to move the car through the air is The area of the effective flow channel behind the car is kW. m².HVAC UPVOTE WILL BE GIVEN. ANSWERS ARE GIVEN ALREADY. PLEASE WRITE THE COMPLETE SOLUTIONS. Air with dry bulb temperature of 25°C (Psat=3.169 kPa) and a wet bulb temperature of 15°C (Psat = 1.7051 kPa) flows in round duct of diameter 800 m/s with a velocity of 7 m/s. Defermine a) RH (Ans. 33%) b) Moisture content (Ans. 00065) c) Sp. Enthalpy (Ans. 42) d) Mass Flow rate (Ans. 249 kg/min) e) Mass Flow rate of dry air (Ans. 247 kg/min) f) DPT (Ans. 8°C) 9) Sp. volume (Ans. 0.85)A Copper ball at 40'Cis dropped in a mug containing water at 40°C. The heat will Select one: O a.not flow from Copper ball to water or from water to Copper ball O b. flow from Copper ball to water O c. Increase the temiperature of both O d. flow from water to Copper ball
- please do both 1.A liquid refrigerant (sg = 1.080) is flowing at a weight flow rate of 23.0 N/h. Required Calculate the mass flow rate in kg/s. (Note: Answer will be small, include 3 digits after at end of leading 0's). 2.When 2600 L/min of water flows through a circular section with an inside diameter of 275 mm that later reduces to a 155 mm diameter. Required Calculate the average velocity of flow in the larger section, to the nearest 1000th.Q/ Air is to be bubbled through the solution in the reactor CSTR, in order to strip out of the solution trace amounts of a solvent that have contaminated the water. The rate of loss of the solvent from the solution can be characterized by the equation r = -0.03/min c, where c is the solvent concentration. What fraction of the solvent will be removed from the water as it passes through the reactor with residence time is 26.4 min.Consider a reciprocating air compressor with two-stage, 6.8 m/min free air delivery at atmospheric conditions of 107 kPa and 19 °C, respectively. The polytropic compression index is 1.21, while the delivery pressure is 2,294 kPa. The mechanical and motor- drive efficiencies are 85% and 93%, respectively. Accept complete inter-cooling and neglect clearance volumes. What is the delivery air temperature in C to no decimal place?
- A steam condenser receives 10 kg per second of steam with an enthalpy of 2570 KJ/kg. Steam condenses into liquid and leaves with an enthalpy of 160 KJ/kg, if cooling water passes through the condenser with temperature increases from 13oC to 24oC. Calculate the cooling water flow rate in kg/sec. Show conversion of units plsAssuming the clearance is negligible for a single stage compressor with the following data.Atmospheric pressure: 90 kPaAtmospheric temperature: 17 ˚CDelivery pressure: 7 barFree air delivery flow rate: 0.2 m3/minTake “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg K 1.What is the power input to the compressor in kW to 2 decimal places if the compression is polytropic compression process with n=1.25?Q2/ In one of applications, wanted to condition laboratory at inside design condition DBT=24 °C and 50% Rh and outside design condition DBT=44 °C and WBT=27 °C. Total sensible load for the space is 35 kW and total latent load for the space is 19 kW. Rate of supplied air to the space is 11050 m /hr and rate of outside ventilation air is 4250 m/hr. The recirculated air is mixing with the outside air and then entering to cooling coil and leaving at 95% Rh then the air is passing through heating coil before supply to the space. Determine: 1.Condition of supply air to the conditioned space (DBT & RH); 2.Condition of air before and after cooling coil (DBT & RH); 3. Sensible load of heating coil; 4.Sensible load and latent load and total load of cooling coil; 5. Apparatus dew point (ADP) for the cooling coil; 6. Draw the cycle on the psychrometric chart.