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jeka94
3 years ago
6

Người ta sử dụng hệ thống cô đặc 3 nồi xuôi chiều tuần hoàn tự nhiên để cô đặc dung dịch đường có suất lượng 10 tấn/giờ từ nồng

độ 18%(KL) lên 50%(KL). Nhập liệu ở nhiệt độ sôi. Áp suất hơi đốt ở nồi đầu là 3ati. Chiều cao ống truyền nhiệt là 3m. Áp suất chân không trong thiết bị ngưng tụ baromet là 0,84at.
a. Tính cân bằng vật chất
b. Tính cân bằng nhiệt lượng
c. Tính nhiệt độ hơi nước bão hòa cần thiết
d. Tính lượng hơi đốt cần thiết cấp cho hệ thống cô đặc
Engineering
1 answer:
Ratling [72]3 years ago
6 0

Explanation:

<h2>Creo que es B o C por favor lo siento si estoy equivocado</h2>
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A subsurface exploration report shows that the average water content of a fine-grained soil in a proposed borrow area is 22% and
Morgarella [4.7K]

Answer:

shrinkage ratio  = 1.538

Explanation:

given data

water content = 22 %

dry density γ = 82 pcf

required dry density specified γ' = 96 pcf

required to produce = 50,000 yd³  = 50000 × 27 = 1350,000 ft³

solution

we get here first volume of borrow pit that is we know that

dry density ∝  \frac{1}{volume}  

so \frac{\gamma d}{\gamma 'd}  = \frac{v'}{v}

\frac{82}{96}  = \frac{1350000}{v}

v = 1580487.8 ft³

v = 58536.58 yd³

so here

shrinkage ratio will be as

shrinkage ratio = \frac{96}{62.4}  

shrinkage ratio  = 1.538

6 0
3 years ago
A car C is traveling up a spiral ramp at a constant and traveling as fast as it can without losing traction. The grade of the ra
arsen [322]

Answer:

26.1 ft/s²

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Which test element is used to apply test execution settings for the main business flow excluding Login and Log out 1) Run time c
Svet_ta [14]

Test element is used to apply test execution settings for the main business flow excluding Login and Log out is "Transaction  controller"

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Transaction controllers are a technoscientifically kind of controllers that produce an additional sample that measures the overall time is taken or response time to perform its nested samplers.

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An Ideal gas is being heated in a circular duct as while flowing over an electric heater of 130 kW. The diameter of duct is 500
Assoli18 [71]

Answer: The exit temperature of the gas in deg C is 32^{o}C.

Explanation:

The given data is as follows.

C_{p} = 1000 J/kg K,   R = 500 J/kg K = 0.5 kJ/kg K (as 1 kJ = 1000 J)

P_{1} = 100 kPa,     V_{1} = 15 m^{3}/s

T_{1} = 27^{o}C = (27 + 273) K = 300 K

We know that for an ideal gas the mass flow rate will be calculated as follows.

     P_{1}V_{1} = mRT_{1}

or,         m = \frac{P_{1}V_{1}}{RT_{1}}

                = \frac{100 \times 15}{0.5 \times 300}  

                = 10 kg/s

Now, according to the steady flow energy equation:

mh_{1} + Q = mh_{2} + W

h_{1} + \frac{Q}{m} = h_{2} + \frac{W}{m}

C_{p}T_{1} - \frac{80}{10} = C_{p}T_{2} - \frac{130}{10}

(T_{2} - T_{1})C_{p} = \frac{130 - 80}{10}

(T_{2} - T_{1}) = 5 K

T_{2} = 5 K + 300 K

T_{2} = 305 K

           = (305 K - 273 K)

           = 32^{o}C

Therefore, we can conclude that the exit temperature of the gas in deg C is 32^{o}C.

8 0
4 years ago
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