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Considering the fact that Canada's proven oil reserves are second only to Saudi Arabia, why are we paying so @#$% much for gas here in Canada? Do we need to become members of OPEC?
ENGINEERING A GAS STATION
Bringing Automation Engineering Into the Classroom
Ken Ball; Past President, ISA Pittsburgh Section
The first thing that happens is that one or possibly two storage tank pumps are energized and one or two solenoid valves open to direct fuel to your unit. If you selected the lowest (regular) octane grade, or the highest (premium) octane grade; then only the pump in that storage tank would turn on and maintain a delivery pressure to your nozzle. (You may be interested to know that only two grades are delivered to and stored at the newer stations—the lowest and highest octane grades)...
Well, you might ask “what happens if I select the super grade or some other grade between the highest and lowest octane”? The simple answer is that the required mix is blended at the dispersion unit; but the blending is not so simple. First, pumps supplying both the highest and lowest grades are energized pressurizing both flow lines to your unit. When the nozzle is activated, flows from both tanks go through their respective flow controllers which basically are combined flow meter and flow restriction units.
The microprocessor now monitors counts from both flow controllers and adds the counts for the customer panel display. The microprocessor also monitors the ratio of the flows and compares this with stored information as to the proper ratio to produce the blend. A flow restriction signal (proportional to the deviation of the rate from that prescribed) is sent to either controller which may be running high and a fast acting solenoid restricts the flow rate. The corrective action signals are adjusted about every half-second. This results in a blend within a tenth or two (on the high side) of the selected octane number.
You Europeans have NO concept of the sheer size and distances involved in driving in the U.S
If gas hits $7.00 a gallon I feel for the gas station .... people like me may just take them over. No way in hell am I paying that much to drive..
Originally posted by alphabetaone
I'm sorry, I don't mean to sound condescending, however youare so wrong in so many venues it's not even funny.
First off, they are NOT mixed at the pumps. Any retailer who is mixing them at the pumps is breaking the law and should be arrested.
Secondly, and this would address more than one post, as an ASE certified automotive professional, I will tell you this much about the higher octane rating. The higher the octane doesn't JUST necessarily mean higher HP throughput...it also has vehicular therapeautic value in that, the higher the octane, the more efficiently the fuel burns-the more efficiently the fuel burns, the more of the fuel that actualy burns AWAY from the cylinders, valve guides, valves, converters, etc. The less carbon buildup in a motor, the less propensity it has for breakdown, and extends the longevity of the motor.
AB1
Originally posted by alphabetaone
Originally posted by ColdWater
Those pretty straight up honest to a fault gas station owners are BSing you about being out of 89 octane. 87 and 91 or 93 are mixed at the pump to make 89.
The station knows most people will buy 87 now that gas is rising. A few used to buy 89 because everyone in America believes if something costs more it is better. Those with sports cars are being pushed to 93 to make up for the lost revenues on 89.
I'm sorry, I don't mean to sound condescending, however youare so wrong in so many venues it's not even funny.
First off, they are NOT mixed at the pumps. Any retailer who is mixing them at the pumps is breaking the law and should be arrested.
Secondly, and this would address more than one post, as an ASE certified automotive professional, I will tell you this much about the higher octane rating. The higher the octane doesn't JUST necessarily mean higher HP throughput...it also has vehicular therapeautic value in that, the higher the octane, the more efficiently the fuel burns-the more efficiently the fuel burns, the more of the fuel that actualy burns AWAY from the cylinders, valve guides, valves, converters, etc. The less carbon buildup in a motor, the less propensity it has for breakdown, and extends the longevity of the motor.
AB1