Q1) In an ice-making plant, water at 0 °C is frozen at atmospheric pressure by evaporating saturated R-134a liquid at -26 °C. The refrigerant leaves this evaporator as a saturated vapor, and the plant is sized to produce ice at 0 °C at a rate of 3500 kg/h.

2) Two glass bulbs, one on the left with a volume of 2 liters and the other on the right with avolume of 6 liters, are connected to one another by a thin tube that is initially closed by astopcock. The bulb on the left has 0.1 moles of ideal gas, and the bulb on the right isevacuated. The system is in thermal equilibrium with the surroundings at 300K. When thestopcock is opened, the gas flows out to fill both bulbs. Calculate A for this process. If wewere to insert a propeller to extract work as the gas flows from left to right, what is themaximum amount of work that we could possibly extract?

Air as an ideal gas is contained in a piston/cylinder system constrained by a non-linear spring. Initially the gas in the cylinder is at 100 kPa, which is balanced by the atmospheric pressure outside of the cylinder (the weight of the piston is negligible). The force on the spring at the start is zero. The spring force is F=kx². k=600. kNt/m². The cross-sectional area of the piston is 1 m², the initial volume is 1 m³, and the initial temperature is 300 K. Heat is added until the volume of the gas has expanded to 1.5 m³. Find: (a) The work done by the gas on the face of the piston (kJ). (b) The final temperature (K). (c) The amount of heat added (kJ). Hint: This problem is easiest if you calculate the spring work and the atmospheric work separately. Air V₁=1.0 m³ Piston Area = 1.0 m² T₁=300 K P₁=100 kPa Atmospheric P on upper piston face= 100 kPa

I need help with this thermo practove problem that I do not understand- thank you! 2 kg of air in a piston cylinder initially at P1=101 kPa, T1= 300 K undergoes a cyclemade up of three processes: 1-2 Isothermal compression until the volume is (1/15) of its original value.2-3 Constant Pressure heating3-1 Isentropic Expansion back to the initial state Assume air is an ideal gas with constant specific heats with the following values: Cpo=1.027kJ/kgK; Cvo= 0.740 kJ/kgK; R=0.287 kJ/kgK; ɣ=1.388 Fill out the processes table below. Calculate Processes 1-2, 2-3, and 3-1 clearly

A single effect evaporator is used to concentrate 10 000 kg / hr of tomato juice from 5% total solids to 30% total solids. The juice enters the evaporator at 15 ° C. The evaporator is operated on Steam (85% quality) at 143.27 kPa. The vacuum in the evaporator allows the juice to boil at 75 ° C. The specific heat of the dilute material is 4.1 kJ / (kg ° C) and the concentrate product is 3.1 kJ / (kg ° C). Count it (a) Steam demand rate = Answer kg / hour. b. Steam economy when condensate temperature is released at 75 ° C. = Answer (kg of water evaporated / kg of steam)