1. If the thermal conductivity increase the heat transfer coefficient wi
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1. If the thermal conductivity increase the heat transfer coefficient will
2.The rate of evaporation at a given operation in an evaporator is more when
a.there is a vacuum
b.the operating pressure is high
c.when the feed flowrate is high
d.the operating pressure is low
3.In fluid, if the currents are set in motion by the action of
a.heatexchanger behavior
b.natural convection
C.forced convection
d.thermal conduction
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- The brewing process involves 4 steps. Boiling, Fermenting, Filtering and Kegging. The batch size is 100 gallons for the boil and fermentation tanks. Process times for the different steps are Boiling: 8 hours/100 gal, Fermenting: 15 days/100 gal, Filtering: 10 gal/hour, Kegging 10 min/5 gal. In order to improve the productivity they decide to introduce a holding tank between the fermentation and filtration steps. They are able to drain the fermentation tank at a rate of 30 gal/hour. Ferment WIP Keg Boil Filter What is the minimum WIP tank size they need? (Round your answer to the nearest 10 gallons) Assume 24 hours/dayQ.1. A refrigeration process with interstage cooling uses refrigerant HFC-134a, and the outlet of the condenser is to be saturated liquid at 40°C. Refer to the following figure for stream numbers in your solution. The pressure of the flash chamber and the intermediate pressure between compressors is to be 290 kPa. The evaporator is to operate at -20°C and the outlet is to be saturated vapor. The flowrate of stream 1 is 23 kg/h. The flash chamber may be considered adiabatic. The compressors may be considered to be 80% efficient. a) What is the power input required to the first compressor? b) What are the flowrates of streams 6 and 7? What is the enthalpy of stream 4? Hot Side 6 5 Condenser 2nd Stage Compressor Throttle Valve 7 Flash Chamber Vapor Phase Only 1st Stage Compressor 8 Throttle Valve Evaporator 1 2 Cold Sidea) In a concentric-pipe heat exchanger, one of the fluids is a condensing vapour and the other is the coolant. Sketch the variation in fluld temperatures of two fluids as they flow through the heat exchanger. Indicate clearly the Inlet and outlet of the coolant and its direction of flow. b) For the case outlined in a) above, the heat-transfer rate, Q, between the two fluids is given by Q =U. Ą ATLI where U, Is the overall heat-transfer coefficient for the heat exchanger, based on the outside surface area of the inner tubo, A, Is the outside surface area of the inner tube and AT Is the relevant temperaturo difference given by ATLM = (T₂-T₁) Tv-T₁ In where subscript v refers to the condensing vapour and subscripts 1 and 2 refer to the Inlet and outlet temperatures respectively of the coolant. 1) State the assumptions used to arrive at the above equation. Explain why the "log-moan" temperature difference above is a more appropriate temperature different for heat exchangers than, say, the…
- 2. A water treatment plant has 6 settling tanks that operate in parallel (the flow gets split into six equal flow streams), and each tank has a volume of 600m3. If the flow to the plant is 10 mgd, what is the retention time in each of the settling tanks? If, instead, the tanks operated in series (the entire flow goes first through one tank, then the second, and so on), what would be the retention time in each tank?Choose the correct answer. Air temperature affects the rate of evaporation because: Temperatures provide heat required for evaporation Temperature controls latent heat of vaporisation Temperature influences the vapour pressure deficit.A conditioned space has a calculated heat loss at the design maximum heating day of 10,000 BTUs / Hr to maintain an interior temperature of 70 F. We will use a hydronic baseboard style convector to heat the space. The style we have chosen comes in standard lengths. At rated temperature and flow of hydronic heating fluid for each 1 foot of length the heater will add 750 BTUs /Hr to the room. What length of heater can just maintain the temperature on the worst day? For this example we are ignoring other sources of heat loss such as ventilation or drafts.
- Variable refrigerant flow systems sense the ______and _____of the refrigerant to determine the optimal volume of refrigerant to circulate.Show step by step solutionQUESTION 3 A manufacturer conducted an experiment for an evaporator capacity 500 kW cooling and designed for high COP of 2 when using lithium bromide plus water in an absorption refrigeration system. The evaporator operates 20 C, condenser 40 C & absorber 45 C supplying 1.4 kg/s of water plus lithium bromide solution to the generator. For a condenser size of 650 kW, determine: Show in your solution paper: Chart reading for Concentration and Enthalphy of solution being pumped Provide in the Answer Box: Enthalpy of solution being pumped in kJ/kg
- Design a cooling tower for range of 8 degree celcius You can also assume missing values(b) Bathroom sinks and some other fixtures include an overflow opening in the basin. This opening is located on the wall and near the top of the basin. The overflow opening serves two important functions: If the water tap is left on while the drain stopper is closed, the opening will channel water down into the drain opening rather than letting is spill out of the sink onto the floor. The overflow allows the sink to drain faster by introducing air into the system. A sink with a dimension given in Figure Q2(b), has water flows into it at a rate of 8 L/min. If the drain stopper is closed and water level in the sink remains constant, determine the average velocity of water flows through the 3.0 cm diameter overflow hole. Front 3 cm diameter overflow holes Q-8 L/min 15 3/4| 40 cm 15 cm Side (a) Figure Q2: (a) Picture of the sink; (b) Sink dimension (Ь)Given problem: Tolits is working on a restaurant famous for its soup. His end of shift is 5:00 pm and needs to go home by that time to pick up his wife, Marites for their anniversary date. A customer made a reservation at 5:15 pm and wants his soup to be ready at that exact time. To ensure the quality of the soup, it should be served at a temperature which is exactly 86C. Tolits needs to prepare the soup before the end of his shift. Initially, as Tolits is preparing the soup, its temperature is 21∘C and placed on a pan heated at 149∘C. After 5 minutes, its temperature is 36∘C. The soup is done (cooked) once its temperature is 120∘C. Tolits found out that cooling it in a sink full of cold water, while the faucet is running with the water resulting to roughly constant temperature of 26∘C, could bring the temperature of the soup to 86C to be ready at 5:15 pm. How many minutes before the end of the shift of Tolits should he start cooking soup so that he is done before 5:00 pm and his…