Precision Bearing Shells: Every Ariel compressor features precision-machined tri-metal main and connecting rod bearings. Versatile Unloading Devices: Ariel offers manual, head-end variable volume clearance pockets on most cylinders. Pneumatic suction valve un-loaders are available on a limited basis. Efficient Valving:. Pdf files for Ariel compressor specifications SharedManuals.com.
Youwave Android 4.0 Full Version. On the compression cycle, the piston also needs to travel further along the stroke to reach discharge pressure as there is more volume to pressurize. The ratio of discharge stroke distance with valve open (or suction stroke distance with valve open) over total stroke distance is the discharge (or suction) volumetric efficiency. The smaller volumetric efficiency (VE) of a cylinder, the smaller the effective displacement. Reducing the VE, reduces horsepower consumption (area inside of curve) and capacity moved. Ariel Corporation. Effect of opening VVCP.
For a gas gathering application, when a stage 1 VVCP is opened, the flowrate of gas (Q) will be reduced and the suction pressure will increase (assuming no pressure restriction / control on wellhead or package). An example of this is shown below with compressor capacity curves with 25, 50 & 75% VVCP shown, overlayed on a production curve. A typical well production curve will produce at a lower rate with more restriction. With effective displacement reduced, the compressor does not pull as hard on the well, resulting in higher pressure/lower flow rate. .
DENVER–Rapid compression capacity expansions in gas gathering systems in unconventional resource plays, followed by the commodity price downturn, has driven the need to increase efficiency and reduce operating costs. This challenge is compounded by the effects that highly dynamic upstream field conditions have on gathering compressors, especially when fed by multiple wells in large-scale field developments.
Given variable well conditions and the design parameters of the types of compressors used in gathering–relatively small-capacity, multistage units with minimal automation to allow for portability from one location to another–average throughput utilization of gathering compressor fleets can be poor unless the units are adjusted continuously. Anadarko Petroleum Corp. Initiated a compressor optimization program last year to safely increase utilization and gathering system performance through advanced monitoring and active operator engagement. The program was implemented in the company’s Greater Wattenberg Area in the Denver-Julesburg Basin, achieving an overall 10-15 percent increase in station throughput.
