1. The buffer tank increases water capacity of the system, which can reduce the numbers of starts and extend life of the compressor.
There are too little water in a central air conditioning system without a butter tank. When it begins to work, the air conditioner will heat the water to the set temperature in a very short time. Then it will stop working. The hot water will be cold very soon so the air conditioner has to start working again. Frequent starts and stops will greatly reduce the life of compressor and wast much energy as well.
If there is a buffer tank in the air conditioning system, the water temperature becomes more stable, the times of starts and stops become less, and the life of compressor becomes longer.
2. The buffer tank increases water capacity of the system, which can make defrosting more efficient.
When the air conditioning system has a buffer tank, plenty of hot water is stored in the tank. So the system get easier when it starts to defrost with hot water.
3. The buffer tank help the system to exhaust air in water.
There is a vent valve on the top of the buffer tank. The air in water will gather automatically on the top of the tank and will be vented smoothly. For a system without a buffer tank, the air venting process is harder. When there’s air in water, the circulator water pump could be alarming frequently. It often stops and starts. It’s a bad thing for the system.