ABSTRACT

In a few short years the Internet has grown from a relatively obscure technology to a widely used and important source of information. Along with the advances in Internet technology have come increased opportunities for "logging in" and telecommuting. Telecommuting provides an excellent opportunity for the gas industry to save money in overhead costs while increasing worker productivity. The Internet allows fast, remote compressor performance analysis if the user is equipped with the right performance enhancing technology. A need exists in the industry for technology that allows portable, rapid, detailed and graphical analysis of real time compressor performance from current SCADA input data. To be truly portable, this technology would have to be capable of running on a laptop computer (or PC) and would have to work from any regular telephone connection. The authors have developed technology that enlists the Internet lntranet to solve many of the problems associated with real time compressor analysis. Using a laptop (or desktop) computer equipped with the software illustrated in this paper, authorized personnel can "dial in" and generate a detailed and graphical "real time" description of the performance of any compressor on the Northwest Pipeline Corporation (Northwest) SCADA System. this paper, "real time" data refers to the latest SCADA data available). This process (In typically takes less than 5 minutes. This paper starts with a discussion of the Internet and the World Wide Web, followed by a description of the evolution of the reciprocating and centrifugal compressor modeling programs at Northwest. RECIP (the off line reciprocating compressor program) is illustrated. Then, RTMCalc (the "real time" Internet/lntranet reciprocating compressor program) is portrayed. After showing the World Wide Web site, some conclusions are offered and potential future developments are discussed. The Internet is a world wide computer network that connects millions of computers and tens of millions of user into one vast communications system. The Internet is often referred to as the "network of networks", in that it is the main network that interconnects all the networks in the world together.

2.1 History of the Internet

The origin of the Internet can be traced back thirty-five years. In the early 1960s, the U.S. Department of Defense (DOD) was concerned how to preserve the United States' communications infrastructure in the event of nuclear war. The DOD realized that traditional switch-based communication systems where switching equipment dedicates a specific circuit for each communication session were particularly vulnerable to disruption due to their very centralized control. If the central circuit switching systems were damaged, the entire communication system would become useless. In 1962, the RAND Corporation, a think-tank, conceptualized a communications methodology called packet switching. Packet switching enables the transmission of data to be broken into smaller units, or packets, and sending the individual packets over the communications lines. Each packet includes an address, to identify the destination computer, and a time stamp to enable the destination computer to assemble the packets into the format of the original data.

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