Cara Menghitung dan Menganalisa Perfomansi Peralatan Utama CPP EEES

Peralatan utama yang banyak mengkonsumsi energi pada CPP EEES ini terbagi menjadi

beberapa jenis, yaitu: Heat exchanger, Cooler, Hot oil heater, Pump, dan Compressor. Pada bab ini

akan dibahas mengenai fungsi masing-masing peralatan dan cara menganalisa perfomansi dari

masing-masing peralatan tersebut.

1. Heat Exchanger

Functions : to transfer heat from high temperature to low temperature of fluid.

Key Performance Indicator :

- Overall heat transfer coefficient (U) Btu/hr.ft2.0F

- Heat duty (Q) Btu/hr

Variable should be Measured :

- Fluid flowrate lb/hr or GPM

- Temperature inlet and outlet of hot side and cold side 0F

- Operating Pressure of hot side and cold side Psia

- Area heat medium tube side (A) ft2

- Spesific heat transfer (Cp) Btu/lb.0F

- Composition of fluid

2. Air Cooler

Functions : to cooling the fluid or to condense the vapor.

Key Performance Indicator :

- Overall heat transfer coefficient (U) Btu/hr.ft2.0F

- Heat duty (Q) Btu/hr

Variable should be Measured :

- Electricity power input kW

- Liquid flow lb/hr or GPM

- Temperature of fluid inlet and outlet 0F

- Temperature of air inlet and outlet 0F

- Pressure of fluid inlet and outlet Psia

- Area heat medium tube side (A) ft2

- Spesific heat transfer (Cp) Btu/lb.0F

- Composition of fluid

3. Pump

Functions : to transfer or to lift up the liquid.

Key Performance Indicator :

- Efficiency which consist of pump efficiency and motor efficiency

Variable should be Measured :

- Electricity power input kW

- Liquid flow GPM

- Suction and discharge pressure Psia

- Spesific grafity of fluid lb/ft3

4. Air Compressor

Function : converting energy from electricity to compress air

Key Performance Indicator :

Actual power / Qs x ((Pd/Ps)^0.2857 – 1)

Variable should be Measured :

- Electricity power input kW

- Pressure of compressed air (suction and discharge) Psia

- Air flow (cubic feet per minute) cfm

- Operating temperature of air compressor 0F

5. Hot Oil Heater

Function : converting energy from fuel gas into thermal in order to increase the temperature of process fluid (hot oil).

Key Performance Indicator :

Efficiency which is consist of combustion efficiency and heat transfer efficiency

Variable should be Measured :

Combustion Efficiency :

- % O2 in flue gas %

- Stack Gas Temperature 0F

- Ambient Temperature 0F

- Fuel gas flow MSCFD or lb/hr

- % excess air %

- Fuel gas heating value Btu/hr

H eat transfer efficiency :

- Fluid flowrate (hot oil) lb/hr or GPM

- Temperature inlet and outlet of fluid 0F

- Pressure inlet and outlet of fluid Psia

- Area heat medium tube side (A) ft2

- Spesific heat transfer (Cp) Btu/lb.0F

- Composition of fluid