Condenser Calculation, Using Thermo Utilities, MS Excel Add-ins

  1. Condenser Heat Transfer Calculations
  2. Air Cooled Condenser Design Calculation Excel
  3. Condenser Design Calculation Excel Formula
  4. Condenser Design Calculation Excel

For outlet temperature calculations. Nonetheless, neither ε-Ntu or LMTD approaches can address the heat transfer / pumping power tradeoffs, which is the crux of a balanced heat exchanger design. For this purpose, Bejan (1987) established the thermodynamic design.

Thermal design calculations of Shell & Tube condensers for horizontal condensers, vertical condensers including reflux condensers; main features: +Support S.I Units/English (U.S) Units of measurement, Units converter containing 23 measurements and 200 units. +Import physical properties data to hot side and cold side from Microsoft Excel & from WeBBusterZ Physical properties database (included. The condenser, coupled with the corresponding fan, and characterized by four rows of finned tubes while the third one refers to a condenser composed of 21 modules (18 parallel-flow and 3 dephlegmator) with three tubes rows. The first step of the analysis has been the design calculation of the condenser main. Calculation; we can ignore this in our calculations since we consider the overall air-side resistance to be constant for all of our calculations). The resistance of the heat exchanger tube is a function of the thickness of the tube s, the conductivity of the tube k, and the mean cross 2.

A surface condenser is required to deal with 15 000 kg/h wet steam. Wet steamtemperature is 37 C and enters the condenser with 0.95 quality (dryness fractionis 0.95). The water used for cooling has the following data:

Condenser Design Calculation Excel

- Inlet pressure 1.20 bar, inlet temperature 7 C

- Outlet pressure 1.013 bar, outlet temperature 22 C

Calculate the flow rate of cooling water and tube surface of the condenser.Assume that the cooling water velocity through tubes is 1.5 m/sTube
Inputs

Units

Wet steam inlet temperature

37

C

Steam quality

0,95

.

Cooling water inlet temperature

7

C

Cooling water inlet pressure

1,2

bar

Cooling water outlet temperature

22

C

Cooling water outlet pressure

1,013

bar

Steam mass flow

15000

kg/h

Cooling water speed

1,5

m/s

Outputs

.

.

Wet steam pressure

0,06274

bar

Enthalpy of steam at inlet

2448,28

kJ/kg

Entropy of condense

154,92

kJ/kg

Rejected heat/hour

34400441,72

kJ/h

Rejected heat/second

9555,68

kJ/s = kW

Enthalpy of water at inlet

29,53

kJ/kg

Enthalpy of water at outlet

92,31

kJ/kg

Water mass flow

547885,14

kg/h

The overall heat transfer coefficient can be calculated according to BEAMAor HEI standards.

BEAMA: British Electrical and Allied Manufacturers Association

Condenser Design Calculation Excel

BEAMA publication on the recommended practice for design of surface typesteam condenser

HEI: Heat Exchanger Institute

Condenser Heat Transfer Calculations

HEI standards for steam surface condensers

Air Cooled Condenser Design Calculation Excel

Outputs

Unit

Heat transfer coeff.(BEAMA)

2,95235

KW/m2,K

Logarithmic mean temp. diff.

49,83

degree K

Required area

64,96

m2

If we use the less conservative HEI method we obtain the following:

Condenser Design Calculation Excel Formula

Outputs

Unit

Heat transfer coeff.(HEI)

3,60991

kW/m2,K

Required area

53,12

m2

Condenser Design Calculation Excel

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