Heat Recovery: Simple Designs to Unlock More Savings

Heat recovery in compressed air systems can be a cost-effective and energy-efficient way to improve overall system efficiency. Compressed air systems generate a significant amount of heat during the compression process, and recovering this heat can be utilized for various purposes. Here are some options for heat recovery in compressed air systems:

1. Air-to-Water Heat Exchangers: Air-to-water heat exchangers can transfer heat from the compressed air to water. This heated water can then be used for space heating, industrial processes, or even for pre-heating water in boilers.

2. Air-to-Air Heat Exchangers: Air-to-air heat exchangers transfer heat from the compressed air to ambient air. This is particularly useful when the recovered heat can be used for space heating or for other processes that require hot air.

3. Preheating Air Intake: Recovered heat can be used to preheat the intake air before it enters the compressor. Preheating the air can reduce the energy required for compression, improving overall efficiency.

4. Steam Generation: Recovered heat can be used to generate steam for industrial processes or for additional power generation. This is especially beneficial in applications where steam is a key component.

5. Adsorption Chillers: In some cases, the recovered heat can be used to drive adsorption chillers, providing cooling for air conditioning or other cooling processes.

6. Hot Water Generation: The recovered heat can be used to generate hot water for various industrial processes or for facility heating.

7. Thermal Storage: Recovered heat can be stored for later use, allowing for more flexibility in its utilization and ensuring that the generated heat is not wasted.

Implementing heat recovery in compressed air systems requires a careful analysis of the specific requirements and processes of the facility. It's essential to consider the temperature and volume of the recovered heat and match it with the needs of the applications where it will be utilized. Additionally, proper insulation and control systems are crucial to maximize the benefits of heat recovery.