Bitzer s6f30 2-stage compressors
Hi guys,
im looking after a low temp pack,which is powered by 5x Bitzer s6f30 2 stage intermediate compressors.
Basically my intrest is this - what state is the ref 22 in as it passes thru intermidiate pipe, what direction,passage its taking and its principle for existing i.e is it increasing compressor capacity? etc.
rang bitzer tech a few times for enlightenment but i felt i knew more about product than them!
I should also point out that each comp has liquid subcoolers on it , which i believe not also helps increase capacity of system but also cools windings of each comp.As phial for liquid is mounted on comp intermediate pipe in a special pocket.
Marc if i remember did u work for nrc? as install is by them.
Ive downloaded regarding this comp off bitzer site but is all spec.
thanx jonah
Re: Bitzer s6f30 2-stage compressors
BOCK two-stage recip compressor :
It receives vapor from evaporator direct in the low side pistons . Compression takes place & the discharged vapor enters a mixing chamber .
The TEX valve which feeds to liquid sub-cooler generates a low pr low temp vapor & this vapor is mixed with the discharge vapor from LP cylinders in the mixing chamber ; thus the temp of vapor is lowered prior for cooling of the motor winding . The vapor further enters suction of HP cylinders for compression process & HP / High temp refrigerant travels to condenser .
This method of sub-cooler does not pose a danger to the LP stage compressor ; it ensures vapor .
These compressors offer a better performance . Any adverse experience anybody had ?
Re: Bitzer s6f30 2-stage compressors
You missed the whole story by 8 years and 5 months!
Re: Bitzer s6f30 2-stage compressors
Dear All
As it seems your are experts in the field of refrigeration!
Iam the owner of one of the Frozen Vegetables producers in egypt, and I need professional help in the following, as no one here In Egypt has the experience nor the understanding of our needs!
We need to implement a Blast Freezer to Freeze Blanched Vegetables with an infeed temperature of +15C and out feed -20C.
We need to freeze 2 tons per 2 hours in a Room with the following dimensions : 5mW 6mL 2.5mH.
We've managed to conclude the systems as follow , Kindly advise which is better and if shall be any other better Options:
A. 2 Copeland 25 hp 2 stage compressors with a Friga bohn 60 KW 6 fans Coil.
B. 2 Bitzer 25 hp 2 stage compressors with a goedhart TN.P 60 KW 4 Fans Coil.
Please advise which will be better the bitzer comp or the copeland , and if these systems will do the Job, and if they will have a long life in production.
Re: Bitzer s6f30 2-stage compressors
With bock two stage , no cic is used . Hence there is little danger of liquid carry-over to cylinders of compressor. It appears to be a better bait between bitzer & bock . The low pressure vapor straight enters the lp cylinder ........ Hence an accumulator would be needed to prevent liquid slop over . Cic failure is also fraught with potential problems ; which is not part of bock package .
Re: Bitzer s6f30 2-stage compressors
Quote:
Originally Posted by
sherif.bakir
Dear All
As it seems your are experts in the field of refrigeration!
Iam the owner of one of the Frozen Vegetables producers in egypt, and I need professional help in the following, as no one here In Egypt has the experience nor the understanding of our needs!
We need to implement a Blast Freezer to Freeze Blanched Vegetables with an infeed temperature of +15C and out feed -20C.
We need to freeze 2 tons per 2 hours in a Room with the following dimensions : 5mW 6mL 2.5mH.
We've managed to conclude the systems as follow , Kindly advise which is better and if shall be any other better Options:
A. 2 Copeland 25 hp 2 stage compressors with a Friga bohn 60 KW 6 fans Coil.
B. 2 Bitzer 25 hp 2 stage compressors with a goedhart TN.P 60 KW 4 Fans Coil.
Please advise which will be better the bitzer comp or the copeland , and if these systems will do the Job, and if they will have a long life in production.
HI SHERIF BAKIR ,
CIC systems are depedent on reliabilty of sensors for triggering liquid injection ...... therefore it may be worth looking at BOCK two-stage compressors. Besides, at (-25) deg C evaporating temp , you may not need a two-stage compressor if you provide a water cooled condenser ........ which can save on your initial cost of compressors .
Re: Bitzer s6f30 2-stage compressors
Hi Koranne
thanks for th help.
But please illustrate more , what is bock 2 stage compressors ?
another thing will this system be able to freeze the 2 tons of blanched vegetables every 2 hours?
Re: Bitzer s6f30 2-stage compressors
Pls visit the website : www.bock.de for the details of 2-stage comp
Re: Bitzer s6f30 2-stage compressors
HI SHERIF ,
I can post you the operating manual , pls send me your mail ID.
The operating manual will explain the working . Besides, for your question regarding freezing time , I need the following info :
refrigeration load , evaporation temp , cndensing temp & refrigerant you wish to use . I can check the suitable model .