Hybrid After Cooling System Segmented Heat Exchanger
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
After cooling systems for compressed air typically rely on air-cooled or liquid-cooled heat exchangers, which face inefficiencies due to the residual heat generated by air compression, leading to higher approach temperatures and reduced performance of downstream equipment like air dryers.
Innovation Solution
A hybrid after cooling system utilizing a pump assembly with a heat exchanger featuring isolated regions and two stages of tubing, where cooling air from the pump is directed through the first stage to cool process air, and ambient air is drawn through the second stage, enhancing cooling efficiency by preventing mixing of cooling air streams and promoting convective heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional air-cooled heat exchanger is used for after cooling, then the system structure is simple, but the approach temperature is high and cooling performance is insufficient
Solution Approach 1:
The heat exchanger is divided into two separate regions: a first region receiving cooling air from the compressor discharge and a second region receiving ambient air. Each region operates independently to cool the process air, preventing mixing of cooling air streams and achieving lower approach temperatures through segmented cooling zones.
Solution Approach 2:
Different regions of the heat exchanger are assigned different cooling air sources based on local cooling requirements. The first region uses compressor discharge air while the second region uses ambient air, optimizing cooling efficiency at different stages of the heat exchange process.
2Productivity
If cooling air from the compressor is used directly without separation, then the system is simpler, but the cooling efficiency is reduced due to mixing of cooling air streams
Solution Approach 1:
The heat exchanger is segmented into two isolated regions that prevent mixing of cooling air streams. The first region handles cooling air from the compressor while the second region handles ambient air, maintaining separate cooling pathways to optimize cooling efficiency.
Solution Approach 2:
The heat exchanger structure acts as an intermediary device that receives two different cooling air sources and separately processes them through isolated regions, preventing direct mixing while achieving effective heat transfer from the process air to both cooling streams.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The hybrid system achieves a 30-40°F temperature improvement in approach temperatures, improving the efficiency of process air cooling and enhancing the performance of downstream equipment by maintaining lower ambient temperatures.
Implementation Method 1
promoting convective heat transfer
Implementation Method 2
cooling air exhaust of the pump is directed at a first stage of tubing within the heat exchanger
Data Source
AI summary
A pump assembly and method of cooling process air generated by the pump. The assembly includes a pump and a motor coupled by a gear arrangement. The pump has a cooling air intake and a cooling air exhaust and a process air intake and a process air discharge. The assembly also includes a heat exchanger having a process air inlet and a process air outlet. The assembly includes isolated first and second regions such that within the first region the cooling air exhaust of the pump is positioned at a first stage of tubing within the heat exchanger and further such that within the second region the cooling air intake of the pump is positioned at a second stage of tubing within the heat exchanger.