Anyone can help how to solve my problem quickly??
Anyone can help how to solve my problem quickly??
(OP)
We had chiller unit to chill the water to provide 4 degC for Oil Fractionation system.
The chiller consist of two circuits, where one circuit has three compressors and the other has two compressors. The compressors are come from Carlyle Compr. 06EA599600 (it was 06EA299600 before).
Yes the compressors were installed in parallel system. However preventing process shutdown due to repetitive failure of the compressors, we now try to make a compressor work as individual as possible, by installing each compressor with individual oil separator and controls. However we still (due to evaps and condenser) we still at the end paralleling those such as after oil separators has a discharge manifold to condensor and having one suction accumulator at each circuit before entering compressors. Compressors are started in asequence according to the temperature ranging from 8 degC down to 4 degC. Our recent problem now is the oil migrate not from "run" unit to "off" unit, but rather from "off"(?) to "run" unit. In circuit having three compressors, the oil flooded was found in the middle one (a strange thing was not vice versa). We are not using the equalizing line as recommended due to the fact that preventing liquid flooded and shutdown the whole process just to repair on the compressor will cost a lot and loosing our company's opportunity. That process is our company's backbone product.
We need anybody advice to levelling the oil at the compressor, working in semi-parallel like we had. We need the answer urgently.
Thanks
The chiller consist of two circuits, where one circuit has three compressors and the other has two compressors. The compressors are come from Carlyle Compr. 06EA599600 (it was 06EA299600 before).
Yes the compressors were installed in parallel system. However preventing process shutdown due to repetitive failure of the compressors, we now try to make a compressor work as individual as possible, by installing each compressor with individual oil separator and controls. However we still (due to evaps and condenser) we still at the end paralleling those such as after oil separators has a discharge manifold to condensor and having one suction accumulator at each circuit before entering compressors. Compressors are started in asequence according to the temperature ranging from 8 degC down to 4 degC. Our recent problem now is the oil migrate not from "run" unit to "off" unit, but rather from "off"(?) to "run" unit. In circuit having three compressors, the oil flooded was found in the middle one (a strange thing was not vice versa). We are not using the equalizing line as recommended due to the fact that preventing liquid flooded and shutdown the whole process just to repair on the compressor will cost a lot and loosing our company's opportunity. That process is our company's backbone product.
We need anybody advice to levelling the oil at the compressor, working in semi-parallel like we had. We need the answer urgently.
Thanks





RE: Anyone can help how to solve my problem quickly??
The 06EA299 has a tendency to break up due to the size of the pistons and the stroke. They tend to be the weakest O6E compressors out there.
RE: Anyone can help how to solve my problem quickly??
cogito ergo sum "I think, therefore I exist"
RE: Anyone can help how to solve my problem quickly??
The answer of imok2 is very correct. Be also sure that all compressors are at the exact same hight. Not one compressor higher than another.
The oil ecualization line should not rise over the level of the connection.
I also suggest check valves after each oil separator.
If nothing works there is a much sophisticated system with oil reservoirs (an more expensive).
Be sure that the diameter of the gas icualization is big enough, normaly bigger than the oil line.
RE: Anyone can help how to solve my problem quickly??
At present the only problem just a different oil migration from "off" to "run" unit, especially when the middle compressor is running; but the level will stays if the middle "off" and side comressor "run".
The piping arrangement was made as such that not directly parallel. Discharge compressor on each unit had oil separator installed, the ogas utlet of the oil separators then joined to go to condensor using common line. Leaving evaporator, there is a suction accumulator installed at the LP gas outlet of the accumulator then split to every compressor. We had checked both the dryers and accumulator there is no indication of oil entrainment. Therefore what we suspect was an equalizing check valve at the lock bolt at each compressor. We understand that direct parallel required an equalizing line, but now we are not using direct parallel of the system. Thank you - lukito