Standby Systems, Inc.

Pre-Engineered i-Systems: iPV

i-Systems iPV iXPV iQM Natural Gas Energy Profile Components Storage Tanks Truck Unloading Stations Pumps Compressors Vaporizers Blenders Packaged Vaporizers/ Blenders Safety & Security Systems Technical Info Why Propane-Air Propane Standby Systems ...an Overview Propane Peak Shaving ...an Overview Unit Converter Thermodynamic Properties Physical Constraints of Hydrocarbons Propane System Benefits Downloads Industry Links NPGA AGA APGA NFPA

iPV
Clean burning gas is the most versatile fuel used in our homes and industry today. Customers have grown accustomed to its reliable supply, low environmental impact, and the functional and aesthetic benefits of piped gas distribution systems. However, where customers choose to live and work is not always where a piped gas infrastructure exists. Extending natural gas to an area may be cost prohibitive, while installation of a fuel tank at every user is unacceptable.
Type iPV propane vapor systems were developed to meet gas utility and real estate development needs for a piped gas supply and distribution system. They represent an integrated, pre-engineered approach to the subject of gas energy supply. iPV systems offer safe, reliable and easy to use technology.
integrated
All type iPV systems are pre-engineered by Standby Systems, a leading designer in natural and propane gas systems for over 30 years. Because they are pre-engineered, you're assured components will work together the way they should, and you will find them easy to install, operate and maintain. iPV propane vapor systems can be equipped with a variety of storage configurations, output capacities and safety features. Optional packages allow users to customize their system to fit individual needs. Complete design and supply of piping distribution systems is also available.
iPV system operation
iPV systems have a simple operating scheme
Liquid propane is delivered into storage tanks through a truck fuel delivery station. Propane liquid is withdrawn from the storage tanks and, if required, the pressure is raised via motor driven pump. Liquid is heated in a gas-fired vaporizer and converted to a super-heated vapor. The propane pressure is reduced and its total flow is metered. It is then distributed via a buried plastic pipe distribution system for customer use. .
iPV Sample Installation
A small iPV propane vapor system is shown in the following pictures. It includes four 1,000 gallon aboveground storage tanks, redundant pumps and vaporizers, and a plastic distribution system. It was installed for a natural gas utility as a temporary fuel supply at a golf community development located 17 miles from the nearest natural gas supply connection. The entire installation occupied a single development lot. As the development grew, natural gas was brought in and the homes were converted for natural gas use. The propane vapor system was removed and the lot sold for development. Propane is delivered by small bobtail truck directly into the storage tanks. Larger storage tanks would be capable of accepting full transport deliveries of propane at lower cost. In many cases these larger tanks are buried or mounded. The propane is then transferred to the vaporizers through a redundant pumping system located beneath the tanks. With buried tank systems, the pump is not used. Twin (redundant) propane vaporizers are used to boil the propane. Propane from the vaporizers is then reduced in pressure via a small monitoring regulator assembly and distributed via standard PE distribution system piping sized large enough for both propane vapor and the future natural gas, if that is planned.This system was capable of delivering up to 29 MMbtu/hr at a pressure of 10 psig. All iPV systems come with a control panel designed to integrate all equipment. Standard features include integrated PLC based control with remote connectivity, and a comprehensive emergency shutdown (ESD) system. Constant attendance of equipment is not required. A propane fueled emergency generator, with auto transfer switch, protects against power outages.Optional features include electronic tank inventory measurement, expanded safety systems and remote system operation.
iPV features
Propane Storage Both aboveground and underground storage options are available in a variety of sizes to meet your needs. All tanks are constructed to the exacting requirements of ASME. Refer to the selection table for available tank sizes and corresponding days of storage.
Fuel Delivery iPV truck delivery stations offer a perfect blend of safety and efficiency. Standard on alliPV systems over 4,000 gallons of gross storage, truck delivery stations are designed for acceptance of both full transport trucks and smaller bobtail vehicles.
Vaporizer Vaporization on the smallest iPV systems is handled using specially equipped direct-fired vaporizers. On larger systems a waterbath style vaporizer is used. Waterbath vaporizers use a heat exchanger immersed in a heated water/glycol mixture to boil the incoming liquid propane to a gas. It is a simple and very reliable system. While designed for outdoor installation, a walk-in enclosure is standard for the burner end of waterbath vaporizers. The enclosure also houses the system control panel. iPV systems are available to meet a wide range of capacities and pressures.
Controls The iPV UL approved control panel is the electrical hub of the system. This panel incorporates all power distribution devices interlocked with the systems comprehensive Emergency Shut-Down controls. System power is brought to this panel and distributed to individual system components. A back-up generator provides uninterruptible power. All field wiring is between terminal blocks with drawings detailing each step of installation.
Safety A comprehensive Emergency Shut-Down (ESD) system provides every iPV user with a level of safety unprecedented in the industry. ESD systems include actuated valves at key points to quickly seal and isolate the system upon activation. Multiple remote shutdown stations allow for operator interaction from several areas.
Gas Detection Three combustible gas detection points are provided using state-of-the-art infrared technology that can activate the ESD system should propane levels be sensed above 25% of the lower explosive limit (LEL). Detection system can be configured to auto-dial preset phone numbers or annunciate through interconnection with owners SCADA system.
installation
Because the iPV system is integrated, it comes designed for simple installation and years of trouble free operation. Extensive documentation includes standard installation drawings and detailed equipment instructions to make installing the iPV both easy and economical.
Technical Support At any stage of installation, iPV purchasers have access to Standby's technical support by simply calling our installation support line.
System startup and training With purchase of optional service package i4, a factory-trained technician will travel to your site, meet with contractors and review installation details. When installation is complete, the technician will return to start and test your system and provide training to system operators.
Engineering Support In some cases additional engineering is required to integrate the iPV into your facilities. Standby offers complete engineering support services to help you with specific needs and can oversee installation with a team of construction management professionals.
Click for PDF Return to Top