How much much heat must be supplied to water at 180 degrees celcius to make 1 kg of wet steam at 9000 kpa , having a dryness fraction of 80% ?

1. For determining the dryness fraction of a sample of steam at 14 bars, it was passed through a throttling calorimeter attached to the steam main. The pressure and temperature after the throttling process were recorded to be 120KPA and 248°F respectively. Calculate the dryness fraction of steam before passing through the throttling unit. Take cps=2.1KJ/kg for superheated steam.

Moist air at 21 C° DBT and 15 C° WBT and standard atmospheric pressure is humid by water spray. If for each one kg of dry air passing through the duct 0.002 kg of wa 100 C° is injected and totally evaporated. Draw the psychometric and schematic figu process and calculate for the air leaving the a- The moisture content. spray chamber: b- The enthalpy c- Dry bulb temperature.

Show that ? and ? for superheated steam depend strongly on temperature and relatively slightly on pressure.

2. Steam at a pressure of 3.5 MPa is known to have a specific volume of 50x10-3 m3/kg. What is its specific enthalpy?

How  much heat must be supplied to water at 180 degrees celcius to make 1 kg of wet steam at 9000 kpa , having a dryness fraction of 80% ?. I was given this as an answer ;but dont know where they found the enthalpy at a 180 degrees in steam table , and dont know how they got 163 for h1 at then end equation to calculate heat ? given; mass,m=1 kg temperature , t =180 degrees celcius pressure,p=9000kpa find q solution: from steam table at 180 degrees celcius , the enthalpy , hf=h10103 kj/kg from the steam table at 9000 kpa hf=763.22 hfg=1378.9 therefore : h2=hf + x (hfg) =763.22 +0.8(1378.9) =1866 kj/kg calculate heat required: q=h2-h1=1866-163=1703

How much energy (BTU) is given off when 5 lbm of saturated steam with a quality of  x=1 at 1 psia?  How does this compare with the same mass condensing at atmospheric conditions?.

800 CFM of air at 90 °F, 50% rh is cooled to saturation. Determine the rate of heat transfer for the cooling process.

Evaporator single effect is used to upgrade the concentrate 10000 kg/h of tomato juice than 5% solids the total to 30% solids total. Juice enters the Evaporator at 15 °C. The Evaporator is operated with Steam (quality 80%) in 143.27 kPa. The condition of vacuum in the Evaporator allow the juice to a boil on the 75 °C. The hot kind of material dilute is 4.1 kJ/(kg °C) and the product the concentrate is a 3.1 kJ/(kg °C). Count a. The Rate of the needs of steam = ...kg/h. b. The economic steam if the temperature is condensate is released at 75 °C. = ...(kg water evaporated/kg of steam)

What is the critical pressure of R-134a, in kPa?