Thermodynamics An Engineering Approach - Complete solution manual

INTRODUCTION AND BASIC CONCEPTS PROPRIETARY AND CONFIDENTIAL Thermodynamics Mass, Force, and Units SOLUTION SOLUTION P P P Solving for Substituting, Solving for , Substituting, Rearranging and solving for SG2, B A Rearranging, or, Substituting, Rearranging, or, Substituting, Substituting, 1-121 Consider a fish swimming 5 m below the free surface of water. The increase in the pressure exerted on the fish when it dives to a depth of 25 m below the free surface is 1-124, 1-125 Design and Essay Problems ENERGY, ENERGY TRANSFER, AND GENERAL ENERGY ANALYSIS PROPRIETARY AND CONFIDENTIAL The First Law of Thermodynamics Assumptions 1 The house is well-sealed, so no air enters or heaves the house. 2 All the lights and appliances are kept on. 3 The house temperature remains constant. Assumptions 1 The room is well sealed, and heat loss from the room is negligible. 2 All the appliances are kept on. The following problems are based on the optional special topic of heat transfer Q . Q Q F PROPRIETARY AND CONFIDENTIAL Therefore, the diameter of the pipe must be at least 3.63 ft to ensure that the velocity does not exceed 59 ft/s. Q Discussion This problem shows that engineering systems are sized to satisfy certain constraints imposed by certain considerations. Q Flow Work and Energy Transfer by Mass Steady Flow Energy Balance: Nozzles and Diffusers Turbines and Compressors Throttling Valves Mixing Chambers and Heat Exchangers Pipe and duct Flow Q Q Q Q Analysis The report states that enhancing IAQ increases the productivity of a person by $90 per year, and decreases the cost of the respiratory illnesses by $39 a year while increasing the annual energy consumption by $6 and the equipment cost by abou... Net benefit = Total benefits – total cost = (90 + 39) – (6 + 4) = $119/year (per person) The total benefit is determined by multiplying the benefit per person by the number of employees, Total net benefit = No. of employees ( Net benefit per person = 120 ( $119/year = $14,280/year Discussion Note that the unseen savings in productivity and reduced illnesses can be very significant when they are properly quantified. Analysis The density of air at the outdoor conditions is The volume of the house is Analysis The density of air at the indoor conditions of 1 atm and 22(C is Analysis The density of air at the outdoor conditions is 5-208 ... 5-213 Design and Essay Problems Q Q PROPRIETARY AND CONFIDENTIAL Second Law of Thermodynamics and Thermal Energy Reservoirs Heat Engines and Thermal Efficiency Refrigerators and Heat Pumps Perpetual-Motion Machines Reversible and Irreversible Processes The Carnot Cycle and Carnot's Principle Carnot Heat Engines Carnot Refrigerators and Heat Pumps Special Topic: Household Refrigerators The density of air at the refrigerated space conditions of 95 kPa and 4C and the mass of air replaced per year are Q Analysis The density of air at the indoor conditions of 92 kPa and 22C is Analysis The density of air at the indoor conditions of 92 kPa and 22C is