A space has occupancy of 35 people engaged in sedentary activity from 8:00 A.M. to 5:00 PM. The average light level is 15 W/m² of vented fluorescent fixtures with a ceiling plenum retum. Office equipment amounts to 7 kW. Estimate the sensible and latent heat gain to the space for a floor area of 750 m² at 4:00 PM. For the sensible heat gain, estimate the radiative and con- vective portions.
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- The temperature of a experimental heated enclosure is being ramped up from 80 to 450°F at the rate of 20°F/min. A thermocouple, embedded in a Thermowell for protection, is being used to monitor the oven temperature. The thermocouple has a time constant of 6 s. ( a ) At t = 10 min, what is the difference between the actual temperature and the temperature indicated by the thermocouple? What is it at 60 min? ( b ) When the thermocouple indicates 450°F, the heater will begin to modulate and maintain the temperature at the desired 450°F. What is the actual oven temperature when the thermocouple first indicates 450°F?The turning moment diagram for a multi-cylinder engine has been drawn to a scale of 1 mm= 4500 N-m vertically and 1 mm = 2.4° horizontally. The intercepted areas between outputtorque curve and mean resistance line taken in order from one end are 342, 23, 245, 303, 115,232, 227, 164 mm2, when the engine is running at 160 r.p.m. If the mass of the flywheelis 1000 kg and the total fluctuation of speed does not exceed 3% of the mean speed, find theminimum value of the radius of gyration.Determine the effective mass at point n and its natural frequency for the systemshown using(1) Energy method(2) Force methodConsider the links to be massless.
- A heat engine operating on the Carnot cycle uses solar energy as the source of high-temperature heat input. The solar irradiation, averaged over the day, has a value of q'flux=0.51 kW/m2. This provides energy to the cycle at a uniform temperature of 450 K, and the cycle rejects heat to the environment at a temperature of 300 K. The engine produces 2000 kW of power. During solution, the following parts must be in order.(a) Sketch the system and its boundary, with all the given data displayed on it.(b) Draw the temperature-entropy (T-s) diagram of the cycle. Assume start of heat addition is state point 1 and all the given data displayed on it.(c) Determine the minimum area of the solar panel in acres that is needed to provide this power. Write down units in each step of the solution, where appropriate. Write your comments on the outcome of your solution. Use correct and appA heat engine operating on the Carnot cycle uses solar energy as the source of high-temperature heat input. The solar irradiation, averaged over the day, has a value of qflux=0.51 kW/m2. This provides energy to the cycle at a uniform temperature of 450 K, and the cycle rejects heat to the environment at a temperature of 300 K. The engine produces 2000 kW of power. During solution, the following parts must be in order. (a) Sketch the system and its boundary, with all the given data displayed on it.(b) Draw the temperature-entropy (T-s) diagram of the cycle. Assume start of heat addition is state point 1 and all the given data displayed on it.(c) Determine the minimum area of the solar panel in acres that is needed to provide thispower Write down units in each step of the solution, where appropriate. Write your comments on the outcome of your solution. Use correct and appropriate symbols for the known andunknown thermodynamic quantities and properties. plz solve completeA heat engine operating on the Carnot cycle uses solar energy as the source of high-temperature heat input. The solar irradiation, averaged over the day, has a value of qflux ¢ = 0.51 kW/m2 . This provides energy to the cycle at a uniform temperature of 450 K, and the cycle rejects heat to the environment at a temperature of 300 K. The engine produces 2000 kW of power. During solution, the following parts must be in order. (a) Sketch the system and its boundary, with all the given data displayed on it. (b) Draw the temperature-entropy (T-s) diagram of the cycle. Assume start of heat addition is state point 1 and all the given data displayed on it. (c) Determine the minimum area of the solar panel in acres that is needed to provide this power. Write down units in each step of the solution, where appropriate. Write your comments on the outcome of your solution. Use correct and appropriate symbols for the known and unknown thermodynamic quantities and properties.
- A heat engine operating on the Carnot cycle uses solar energy as the source of high-temperature heat input. The solar irradiation, averaged over the day, has a value of qflux = 0.55 kW/m2. This provides energy to the cycle at a uniform temperature of 420 K, and the cycle rejects heat to the environment at a temperature of 350 K. The engine produces 2500 kW of power. During solution, the following parts must be in order. (a) Sketch the system and its boundary, with all the given data displayed on it. (b) Draw the temperature-entropy (T-s) diagram of the cycle. Assume start of heat addition is state point 1 and all the given data displayed on it. (c) Determine the minimum area of the solar panel in acres that is needed to provide this power. Write down units in each step of the solution, where appropriate. Write your comments on the outcome of your solution. Use correct and appropriate symbols for the known and unknown thermodynamic quantities and properties.a) b) You want to know the temperature of the receiver after 8 hours of night time have passed (in the conditions described in the previous question). What technique would you use to determine this temperature? General lumped capacitance or 1-D transient analysis? Why?Considering Figure 20-8 (textbook), the torsion geometry parameter, Jw, for case 6 when b=6 and d=9 is most likely: 60.8 283.5 400.5 386.0 184.1 562.5 279.0 572.6 392.6
- Spring mass system has mass of 30 kg and natural frequency of .80 rad/s. Determine the stiffness of the spring.1) An electric motor’s torque is a function of the speed at which it rotates. Many brushed AC motors have a linear toque curve as shown below. If the power output of the motor is equal to the torque (T) multiplied by the rotational speed in rad/s (w), what is the maximum power you can get out of the motor if the stall torque (Tstall) is 0.001 Nm and the no load speed (wno load) of 10,500 RPM? Give answer in Watts.A 210 g mass attached to a horizontal spring oscillates at a frequency of 2.80 Hz. At t = 0 s, the mass is at 6.40 cm and has vx = -45.0 cm/s. Determine the position at t = 5.40 s