Multiple Evaporator Systems it may be required to
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Q: M M M M L- 5e FIG. 2. Problem 2 Find D in the above figure in terms of 0, and L.
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- p-h diagram is .10 used to determine the refrigeration сарacity. used to determine the refrigerant flow rate in the cycle. important to determine the properties of the refrigerant at any point in the cycle. none of these answers. OO Falge QUESTION 2 The refrigerant undergoes a change of phase during the heat-transfer process, the pressure of the retrigerant is the saturation pressure during the low supply and low rejection processes. True False QUESTION 3 Frequently, the vapor of the liquid leaving the condenser is lower than the saturation temperature. O True False QUESTION & The pressure of the iquid leaveng the condenser we be less than the pressure of the vapor entarng, wd etempernd the retigerant in the condenser. O Te QUESTION S Are many situations in which it is desirable to combine three cycles in series, either power systems or refigertion sytems, to take advantage of a very wide temperature range or to utilize what would otherwise be waste heat to improve etficiency O true O False QUESTION 6 A cycle can't be made very efficient, since the temperature differences between the two fluid streams can be controlled through careful design of the combined system. TrueThe typical difference in temperature between the cooling tower water supplied to the condenser and the out-door wet-bulb temperature is _____F.
- The evaporator design temperature may in some cases operate at a slightly ____(higher or lower) pressure and temperature on high-efficiency equipment because the evaporator is larger.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 equivalent evaporation of the boiler? Determine the specific heat capacity of the delivered steam
- Q4//A// Prove for the condenser: + %3D Cpw (Twz-Tw1) when the temperature of cooling water outlet and inlet is equal to saturation temperature of steam and the condensate leaving the condenser respectively; also, the inlet of condenser is dry steam with unity latent heat. m, TwiRefrigerant 12 Condensing temperature = 46.2 oCEvaporating temperature = -3 oCTemperature of the suction vapor = -15.6oCRefrigerating Capacity for evaporator = 44 TONDetermine the COP3. Solar radiation heats the surface after sunrise, and the resulting heat flux F to the atmosphere is approximated by 2T(t – tnoon) F = F cos 6 a.m. < t< 6 p.m. max At
- B// What are the methods of draught in cooling towers. Demonstrate them with drawings. What is the relationship between the cooling tower and condenser. Q4IIA// Prove for the condenser: %3D + Cow (Tw2-Tw1) when the temperature of cooling water outlet and inlet is equal to saturation temperature of steam and the condensate leaving the condenser respectively; also, the inlet of condenser is dry steam with unity latent heat. Twi 1A manufacturing company is intending to use its water cooled condenser for itsproposed cold storage room. The name plate of the condenser gives the followingspecifications:refrigerant ammoniacondenser water inlet 30 OCcondenser water outlet 40 OCcondensing temperature 35 OCrefrigerant flow 3.84 kg/mincirculating water flow 120 kg/minIf the company decided to purchase a new compressor and evaporator, find the tonnageof the system and the temperature in the evaporator, (b) what is the COP? (c) find thetheoretical hp required.The food storage room requires a cooling system with a capacity of 15 tons and refrigeration that operates at an evaporator temperature of -17.5 degrees Celsius and a condenser temperature of 37.0 degrees Celsius. The refrigerant used is R - 134 A and the operating system is saturated. Determine C.O.P, refrigerant flow rate and heat loss rate in the condenser.