Chapter 7, Problem 7.6P

An Otto engine has a clearance volume of 7%, it produces 300 kW of power in a minute. Find: Compression ratio heat added in kW heat rejected in kW Volume displacement if volume at point 1 is 0.1 m³ mean effective pressure in kPa Thermal efficiency, %

Make a control volume around Heat to room the refrigerator in Fig. 1.3. Identify the mass flow of external Wam vapor O Condenser air and show where you have Work Warm liquid significant heat transfer and Comprossor Expansion valve where storage changes. or Evaporator capillary tube The overall density of fibers, rock ww Cold vapor O Cold liquid + vapor wool insulation, foams, and FIGURE 1.3 Schematic diagram of a refrigerator. Heat from cold refrigerated space cotton is fairly low. Why? Is density a unique measure of mass distribution in a volume? Does it vary? If so, on what kind of scale (distance)? What physically determines the variation of the atmospheric pressure with elevation? What is the lowest temperature in degrees Celsius? In degrees Kelvin?

Please solve it in 20 minutes

Pls. Answer thank you! Water at 55°C is cooled in a cooling tower which has an efficiency of 65%. The temperature of the surrounding air is 32°C dry bulb and 70% relative humidity. The heat dissipated from the condenser is 2,300,000 KJ/hr. Find the capacity in liters per second of the pump used in the cooling water

The evaporator of a refrigeration system is to be maintained at-12°C.If degree superheat is 7℃, find the temperature of refrigerant entering the compressor.

In a spray condenser, find the ratio of circulating water to steam flow if the condenser pressure is (0.07 bar), and the cooling tower cools the water to (18"C). Assume turbine exhaust at (89%) quality.

A 110-volt electrical heater is used to warm 0.3 m3/s of water from 19oC to 98oC .Assume heat conversion loss of 25% of the total heat supplied, how much current inamperes must be supplied to this heater?

Water at 55°C is cooled in a The temperature of the surrounding air is from the condenser is 2,300,000 kJ/h. Find the capacity in liters per second of the pump used in the cooling tower. cooling tower which has 32°C dry bulb and 70% RH. an efficiency of 65%. The heat dissipate

In a spray condenser, find the ratio of circulating water to steam flow if the condenser pressure is (0.01 bar), and the cooling tower cools the water to (T=12 "C). Assume turbine exhaust at (86%) quality.