t is desired to prepare a sweetened concentrated orange juice. The initial pressed juice contains 5 % of total solids and it is desired to lift this to 10% of total solids by evaporation and then to add sugar to give 2% of added sugar in the concentrated juice. Calculate the quantity of water that must be removed, and of sugar that must be added with respect to each 1000 kg of pressed juice.

Determine the following for a humid air stream at 1 atm if the enthalpy deviation is - 0.6 kJ/kg dry air and the wet bulb temperature is 30 °C. Use the attached psychrometric chart. a. What is the dry bulb temperature? b. What is the humid volume? c. What is the dew point temperature? d. What is the absolute humidity? e. What is the relative humidity? f. What is the enthalpy for a saturated air stream? g. What is the actual enthalpy? h. How much water is in 40 kg (total) of this stream?

Shape memory polymers are a class of materials that can remember their original shape and transition between shapes when stretched, twisted, or compressed. They have recently found uses in orthopedics and as other surgical and dental implants. One of the most promising new materials is PEEK (polyether ether ketone). It is a very good electrical and thermal insulator. As a dental implant material, it provides the patient a comfortable implant that does not conduct heat or alter taste, which can be a constant bother with traditional materials (see the photo). Imagine a PEEK implant that is 1.612 cm in length with a circular radius of 1.327 mm. Note that 1 meter = 100 cm = 1000 mm. An ice cube is in contact with the end of the implant. How much heat is transferred along the length of the implant in 36 seconds, if the change in temperature across the implant is 27 °C? The thermal conductivity of PEEK is 0.25 W/(m · C°). Note that your answer is a small number, indicating that this implant…

In the process of drying carrots using a parallel flow drying system, the material with a moisture content of 85% enters the drying system at a rate of 500 Kg / hour to produce dry carrots with a moisture content of 20%. If it is known that hot air used as the drying medium has a humidity ratio of 0.006 Kg of water per Kg of dry air and the flow of hot air enters the system at a rate of 200 Kg of air for each dry matter produced, calculate the ratio of humidity to air leaving the system assuming that the system is under steady state conditions.