Issue:
How should the braze plate heat exchanger be cleaned?
Resolution:
- Due to the typically high degree of turbulence in the BPHE, there is a self-cleaning effect in the channels.
- However, in certain applications, such as when using extremely hard water at high temperatures, the tendency for fouling can be significant.
- In such cases, it is recommended to clean the exchanger by circulating a cleaning liquid using a CIP (cleaning in place) method.
- A tank with weak acid, such as 5% phosphoric acid or, in cases where the exchanger requires frequent cleaning, 5% oxalic acid, can be used. The cleaning liquid should be pumped through the exchanger.
- For optimal cleaning, the flow rate of the cleaning solution should be at least 1.5 times the normal flow rate, preferably in a back-flush mode. After use, it is important to thoroughly rinse the heat exchanger with clean water. A solution of 1-2% sodium hydroxide (NaOH) or sodium bicarbonate (NaHCO3) can be used before the final rinse to neutralize any remaining acid. Regular cleaning at designated intervals is recommended.
Other Question/Problem/Cause Statements:
- How should the braze plate heat exchanger be cleaned?
- How to clean a braze plate heat exchanger?
- How do I clean the evaporator?
- What is the best way to clean the evaporator?
- Cleaning the braze plate evaporator?
Facts:
- Air-Cooled Chiller (Pueblo) (CGAM 20-130 Ton)
- Air-Cooled Chiller - Intellipak (CGAF)
Combined the following HUB Documents: DOC-101952 & DOC-97607
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.