Chapter 5, Problem 5.19CU

(b) A company is unable to satisty customer demand for one of their products. The ratios for mixing the outputs from processes C, D and E are 2, 1 and 1 respectively. The ratio for the departments F and G is 3 and 1, and the ratio for departments H and I is 4 and 1. Using Table Q2(b), Determine; (1) The system capacity and bottleneck; (i) How much system capacity can be gained by adding capacity to the bottleneck

4.5 thermodynamics

At steady state, a reversible heat pump cycle discharges energy at the rate Q˙H to a hot reservoir at temperature TH, while receiving energy at the rate Q˙C from a cold reservoir at temperature TC.(a) If TH = 10°C and TC = 2°C, determine the coefficient of performance.(b) If Q˙H= 15 kW, Q˙C= 8.75 kW, and TC = 0°C, determine TH, in °C.(c) If the coefficient of performance is 5 and TH = 27°C, determine TC, in °C.

5 thermodynamics

Identify valid processes as those that satisfy both the first and second laws of thermodynamics.

machanical science

2. A power cycle receives energy QH by heat transfer from a hot reservoir at TH = 1200 R and rejects energy QC by heat transfer to a cold reservoir at TC = 400 R. For each of the following cases, determine whether the cycle operates reversibly, operates irreversibly, or is impossible. (a) QH = 900 Btu, Wcycle = 450 Btu (b) QH = 900 Btu, QC = 300 Btu (c) Wcycle = 600 Btu, QC = 400 Btu (d) Eff. = 70%

1. In system, no mass can cross its boundary. However, it only allows energy transfer across its boundary o Control system o Closed system o Isolated system 2. Heat transferred to a system and work done by a system are always positive. o True o False 3. —— is a device that decreases the velocity of a fluid by increasing its pressure. o Nozzle o Diffuser o Compressor o Turbine 4. A heat engine may not reject any heat to a low-temperature reservoir and still can complete a cycle. o True o False 5. Heat is removed from the compartment of a refrigerator at a rate of 250 kJ/min. The refrigerator consumes 0.8 kW, determine the COP of the refrigerator. 6. It has been proved experimentally by joule that the internal energy is a function of o Temperature only o Pressure only o Volume only o All together 7. The combination of flow energy and internal energy gives - 8. A process during which there is no heat transfer o Adiabatic o Isentropic o Polytropic o Isothermal 9. Heat is transferred to a…

A fluid flows at steady state through a diffuser. The diameter of the outlet (D2) istwice the diameter of the inlet (D1). The velocity of the fluid at the outlet (V2) is related to thevelocity at the inlet (V1) as which of the following:A. V1 = ½ V2B. V1 = V2C. V1 = 2V2D. V1 = 4V2