I have replaced two 12 v marine starter batteries with two new 12 v marine starter batteries. They are connected in series to obtain 24 v to power a starter/alternator. They are used to start the #1 Generator and the Main Engine. The #1 generator started fine, but when starting the M/E the main...
It seem to me that a cascade refrigeration system is the same as a secondary refrigeration system and also the same as an indirect refrigeration system.
I see no difference between the secondary and idirect methods.
Are they the same type of refrigeration system?
The only thing possibly...
I have found some information on the internet. Calcium sulphate precipitates at 300°F or 149°C, which is a high temperature found in the boiler. Can anyone confirm this?
Thank you.
At what temperature does calcium sulphate and calcium carbonate deposit (precipitate)from water?
From my knowledge, calcium sulphate solubility increases as the temperature increases. Therefore, it wouldn't be the temperature of the water that would cause the CaSO4 to precipitate, but rather...
Hello all,
HFCs as a refrigerant can be used in simple refrigeration systems, i.e. system incorperating, compressor, oil seperator, condenser, control/expansion valve, evaporator, and accumulator. However, HFCs are being wend out of the automotive industry and carbon dioxide refrigerants are...
I would like to know more about these systems. I know the enviromental advantages, but have very little knowledge of the system itself. Can CO2 work in a normal refrigeration system as long as the compressor is capable of reaching the high condensing pressure of CO2? Does the condensor tubes or...
What parts of a boiler and engine are made of mild steel? I'm sure the generating and water wall tubes are made of mild steel, but what else in the boiler is made of mild steel? I know alot of parts in some slow and medium/fast speed engines are made of steel (bed plate, 'A' frames, steel backed...
If my SG is 0.0005 the TDS = (0.0005 -1)1.1x10 to the power of 6 = -109945 ppm . That's obviously not correct. The only way I can get the correct answer is if I remove the -1 and then change the 1.1 to 1.0x10 to the power of 6. So,
TDS = SG x 1.0X10 to the power of 6
= 0.0005(1.0 x 10 to...
To Kenvlach,
We use hydrometer on board our steam ships to obtain an approximate measurement of the dissolved solids in the boiler water. Since the relative density of water is related to its dissolved solids content, each increase of 0.0001 relative density at 15.6°C is approximately equal to...
I have read that TDS (total dissolved solids) can be expressed in mg/L or alternativly in ppm. Since density= mass/volume, does that make TDS = Density?
I have also read that TDS can be found using density,
TDS = 1.1 106 (? - 1)(1)
where
TDS = Total Dissolved Solids (ppm)
? = relative density...
I have read that by multi-staging in air compressors or turbochargers,(allowing the air to pass through intercoolers between stages) returns the air to its original temp. and brings it compression (P-V) curve closer to that for an Isothermal operation. I assume that without intercooling the...
How can they be adjusted and what would be the effect of those adjustments. I do have knowledge on this topic but would appriciate some out-side input. Diesel engines or reciprocating air compressors can be used as examples. THX.
