Calculation on a water cooled compressor

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SUMMARY

The discussion focuses on calculating the water temperature in a water-cooled compressor system, specifically in step 3 of the process. The water temperature in step 2 is assumed to range between 288K and 313K, with a flow rate of glycol and seawater at 6.8 liters per second. Key parameters for calculation include the material being compressed (air), the inlet and outlet temperatures of the compressed material, and the heat transfer requirements, which can be obtained from the compressor supplier. A 300 kW compressor typically requires about 20 kW of cooling, necessitating the use of specific heat data for the glycol solution to determine the temperature rise.

PREREQUISITES
  • Understanding of heat transfer principles in cooling systems
  • Familiarity with compressor specifications and cooling requirements
  • Knowledge of specific heat calculations for glycol solutions
  • Ability to interpret temperature and flow rate data in thermal systems
NEXT STEPS
  • Research the specific heat of glycol solutions for accurate temperature rise calculations
  • Learn how to obtain and interpret heat transfer requirements from compressor suppliers
  • Explore methods for calculating inlet and outlet temperatures in thermal systems
  • Investigate the impact of flow rates on cooling efficiency in compressor systems
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Engineers, HVAC professionals, and technicians involved in the design and optimization of cooling systems for compressors, particularly those working with glycol and seawater cooling methods.

mariuog
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How can i calculate the water temperatur in step 3? Do i need more information?
We can assume the water temperatur in step 2 is anything between 288 and 313K.
If anyone knows how to calculate step 4, ill take that as well.
 
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Some items needed:
1) flow rate of glycol & sea water
2) material being compressed
3) inlet & outlet temperatures of material being compressed

Usually you can obtain the heat transfer requirements from the compressor supplier.

Depending on the type of exchanger, step 2 could be 288 K. That information is also needed.
 
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Vedward said:
Some items needed:
1) flow rate of glycol & sea water
2) material being compressed
3) inlet & outlet temperatures of material being compressed

Usually you can obtain the heat transfer requirements from the compressor supplier.

Depending on the type of exchanger, step 2 could be 288 K. That information is also needed.
The flow rate of water+glycol is 6,8 liter/s
The material been compressed is air, i don't know the inlet & outlet temperatures, but i know the max temperature of the air inlet is 313K but reference conditions is 293K.
Can you make an assumption of the rest of the values and show how to calculate the temperatures in step 3? Let's say step 2 is 300K(you can choose something else if you want to)
Thank you so much for the answer!
 
I looked in my old work files, it seems a 300 kW compressor needs about 20 kW cooling. This is from manufacturer's data, not computable from standard conditions. So the 6.8 l/s flow of glycol solution will be heated by 20 kW. When I was working, I did all my calculations in English units (actually American units, now since we are the only one using them nowadays), so you will have to calculate the temperature rise in K using the specific heat of the glycol solution, since I don't have this data in SI units.

V. Eddy
 
OP: Do you know the air flow rate? Have you given us all the information?
 

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