Electric energy is to be stored at a station in which 5000 condensers are connected in parallel. The capacity of each condenser is 200 μF. The system is to be charged to a P.D. of 50 kilovolt with a power supply which costs at a rate of Rs 1 per kilowatt hour. Calculate the cost of storing.

9-101C Consider a simple ideal Rankine cycle with fixed turbine inlet conditions. What is the effect of lowering the condenser pressure on Pump work input: (a) increases, (b) decreases, (C) remains the same Turbine work (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same output: Heat supplied: Heat rejected: Cycle efficiency: Moisture content at turbine exit:

Check Your Understanding If the reservoir in Example 14.1 covered twice the area, but was kept to the same depth, would the dam need to be redesigned?

Water supplied to a house by a water main has a pressure of 3.00105N/m2 early on a summer day when neighborhood use is low. This pressure produces a flow of 20.0 L/min through a garden hose. Later in the day, pressure at the exit of the water main and entrance to the house drops, and a flow of only 8.00 L/min is obtained through the same hose. (a) What pressure is now being supplied to the house, assuming resistance is constant? (b) By what factor did the flow rate be water main increase in order to cause this decrease in delivered pressure? The pressure at the entrance of the water main is 5.00105N/m2 , and the original rate was 200 L/min. (c) How many more users are there, assuming each would consume 20.0 L/min in be morning?

Give 50 topics/titles for refrigeration system design.

Q 145. Creating large vacuum leake will cause the short term fuel trim STFT and long term fuel trim LTFT to decrease. T F

A water pump delivers 6 hp of shaft power when operating. If the pressure differential between the outlet and the inlet of the pump is measured to be 1.2 psi when the flow rate is 15 ft3/s and the changes in velocity and elevation are negligible, determine the mechanical efficiency of this pump.

Design the solar PV system for following parameter (i) Load estimation (ii)Estimation of number of PV panels (iii) Cost estimation of the system.   Base condition: 4 CFLs(18 watts each),2 fans (60 watts each) for 6hrs a day.  Sunlight available in day 8 hrs,  Battery and inverter efficiency 90% both and operating factor 0.75, Peak power rating 55 W

4 A sample A of liquid water and a sample B of ice, of identical mass, are placed in a thermally insulated container and allowed to come to thermal equilibrium. Figure 18-25a is a sketch of the tempera- ture T of the samples versus time t. (a) Is the equilibrium temperature above, below, or at the freezing point of water? (b) In reaching equi- librium, does the liquid partly freeze, fully freeze, or undergo no freez- ing? (c) Does the ice partly melt, fully melt, or undergo no melting?