The fuel in the form of biomethane is burned in a furnace. In order for the combustion to take place in excess of 50%, calculate the air to fuel ratio (vol/vol) from this problem!

A fuel with a molar composition of 75% CH4 and 25% C2H6 enters a burner with an excess of 80% air and is fully burned there. The temperature of the fuel and air entering the burner is 298 K; Since the temperature of the combustion products coming out of the burner is 550 K, calculate the transferred heat as (kJ / kmol fuel). (Cp / R = A + BT)

A one-inch thick steak initially at room temperature is placed inside an oven maintained at 250 o C. Estimate how long it will take for its internal temperature to reach 70 o C. What will be the surface temperature at that time if we assume no steam generation? Include radiation as well as convection (h ~ 3 W/m²/K) in your analysis.

Solve the following exercise: There is a solution of organic colloids, which is concentrated in water from 12% to 47% in a simple effect evaporator. The water vapor is at a pressure of 150 kPa and the pressure in the evaporator is 13.60 kPa. The feed rate to the evaporator is 12300 kg/h. The overall heat transfer coefficient is taken to be 1600 W/m2 °C. The solution has negligible boiling point elevation. Calculate the heating surface required if the feed temperature is 27.3 °C, plus the steam consumption. The feed heat capacity is 3.2 kJ/kg*K. 12300kg/h Tf 12%solids Ts Pman=150kPa F s T1 P1=13.60 kPa S L 47% solids

Question 10 please

Once the methanol has reached its boiling point, it must be vaporized. Themolar enthalpy of vaporization for methanol is 38 kJ mol-1 . How much heat must be added to vaporize 1.00 kg methanol?

Fruit juices at 30 ° C containing 5% total solids were concentrated via a single effect evaporator. The evaporator is operated in a vacuum at an evaporation temperature of 80 ° C, and 90% quality steam is supplied at 169.06 kPa. The desired concentration of the final product is 40% total solids. The rate of concentrated product leaving the evaporator is 2000 kg / hour. The specific heat of fruit juice is 4.05 kJ / (kg ° C), and the concentrated product is 3,175 kJ / (kg ° C). Count a. The required steam rate is = kg / hour. b. Steam economy when the condensate temperature is released at 90 ° C. = (kg of water evaporates / kg of steam)

ll Verizon 99% 1:01 AM Done 3. A vessel containing 50 liters of saturated steam at 150 °C is cooled down to 25 °C. Using data from steam tables, determine the final mass and volume of the liquid water in the vessel. Calculate how much heat needs to be removed

Fruit juices at 25 ° C containing 5% total solids were concentrated via a single effect evaporator. The evaporator is operated in a vacuum at an evaporation temperature of 80 ° C, and 85% quality steam is supplied at 169.06 kPa. The desired concentration of the final product is 40% total solids. The rate of concentrated product leaving the evaporator is 2000 kg / hour. The specific heat of fruit juice is 4.05 kJ / (kg ° C), and the concentrated product is 3,175 kJ / (kg ° C). Count a. The required steam rate is = kg / hour. b. Steam economy when the condensate temperature is released at 90 ° C. = (kg of water evaporates / kg of steam)

Fruit juices at 20 ° C containing 5% total solids were concentrated via a single effect evaporator. The evaporator is operated in a vacuum at an evaporation temperature of 80 ° C, and 85% quality steam is supplied at 169.06 kPa. The desired concentration of the final product is 40% total solids. The rate of concentrated product leaving the evaporator is 3000 kg / hour. The specific heat of fruit juice is 4.05 kJ / (kg ° C), and the concentrated product is 3,175 kJ / (kg ° C). Count a. The required steam rate is = Answerkg / hour. b. Steam economy when the condensate temperature is released at 90 ° C. = Answer (kg of water evaporates / kg of steam)