Sunday, September 16, 2012

Marine Photo Contest by Cummins

Prize Details

Features : 9.7 Retina Display; 2048 × 1536 Resolution Apple iOS 5; Dual-Core A5X Chip with Quad-Core Graphics 5 Megapixel iSight Camera; 1080p Video Recording Wi-Fi (802.11a/b/g/n); 16 GB Capacity Up to 10 Hours of Battery Life; 1.44 lbs

Prize Eligibility : Only persons who are at least 18 years of age can enter.

Contest Starts:   August 15, 2012 @ 12:00 am (CDT)

Contest Ends:    October 15, 2012 @ 11:59 pm (CDT)

About the Company
Cummins Power Generation is a world leader in the design and manufacture of power generation equipment, including PowerCommand standby and prime power systems. We also provide single–source warranty, planned maintenance, and round–the–clock emergency service 24 hours a day, seven days a week including back–up power rental through our network of distributors.

Cummins Generator Technologies previews upcoming AvK range for marine and harsh environments

At the SMM Hamburg exhibition in Germany, customers and potential customers had their first chance to see a new range of robust AvK generators under development by Cummins Generator Technologies. The new range, scheduled for availability next year, is being specially designed for marine and harsh environment applications. Market leading weight, size and efficiency ratings will establish the product as a leader within its field.

To meet the challenges of marine and harsh environments, the new range features a low voltage 4-pole robust, bar wound design, and will be compliant with marine industry classifications. The new units are predicted to provide an estimated power range of 1500 kVA to 3400 kVA at 50 Hz and 1800 kVA to 4100 kVA at 60 Hz and voltages between 400 V and 690 V with insulation class H as standard. A unique modular design construction and a range of options will allow flexibility to suit typical marine and harsh environment applications, including an air to water cooler, rolling element or sleeve bearing options and Ingress Protection ratings SOLAS IP23 and IP54.

Availability is expected late 2013. Further variations of the new range will be announced over the coming months. Prime Power, Grid Code Compliant and Oil & Gas versions, including medium and high voltage, are all under development.


Case study details Cummins role in Broadcrown biogas combined heat and power project

A new case study highlights the role that Cummins Energy Solutions Business and Cummins Generator Technologies played in the implementation of a biogas combined heat and power solution for a major sewage treatment works in London, UK. Cummins QSV91 lean-burn gas engines are at the heart of three Broadcrown generator sets that provide power to a sewage treatment works while simultaneously providing heat for the site’s processes.

Broadcrown is a leading UK independent manufacturer of power generators and generation systems from 6 kVA through to +30 MVA. It was Broadcrown’s task to design and supply a cogeneration solution to Riverside Sewage Treatment Works, owned and operated by utility company Thames Water.

The project was innovative and sophisticated. As well as renovating four existing digesters, the work also involved the provision of a Thermal Hydrolysis Plant, fed by high-temperature steam from a boiler heated by the biogas engines’ exhausts. Broadcrown’s design for the project also involved fire protection through a water mist system, jacket water heat recovery, a full header tank system, standby generators and a control system to interface with the site-wide power management system.

Three Broadcrown Combined Heat and Power generator sets were installed, each equipped with Cummins QSV91 lean-burn gas engines and Cummins Generator Technologies STAMFORD ® alternators. All three Broadcrown units were housed in custom-designed acoustic enclosures, built on site.


Synchronizing Generator (Paralleling)

What is Paralleling ??
- Make two or more small gensets work together and act like one BIG genset.
- Power available is the sum of all the machines in the system.

Generator sets can be paralleled to other generator sets or the utility. To operate in parallel, both units must match phase sequence, voltage, frequency, manage neutral currents, operate with the same frequency directional rotation and produce almost exact sine waves. Only after these conditions are met can the units be connected together by a breaker.

Why Parallel Gensets ??
- More Reliability
- More Performance
- Cost Effectiveness

Don't Parallel when :
- Existing gensets not compatible with new.
- Loads can't be split and controlled.
- Gensets are very small (under 300kW)

From: Cummins Power Generation, Caterpillar

What is Automatic Transfer Switch (ATS) ??

Automatic Transfer Switch or ATS is a device that transfers electrical loads between two dissimilar sources of power by using either automatic or manual controls, ATS are most commonly use by facilities with a standby power system and a single utility feed. The transfer switch senses when utility power has been lost, send a start signal to the standby generator and transfer the load.

Transfer Modes
- Open Transition (Break-before make switching action)
- Closed Transition (Make-before-break switching action)

From: Cummins Power Generation

Thursday, September 13, 2012

Type of Fuel Tank (For Generator Application)

Day tanks: Tanks at or near the generator set from which the generator set draws its fuel are called day tanks (although they do not necessarily contain sufficient fuel for a day’s operation). These are used as a convenience or when it is not practical to draw directly from the primary fuel storage system. The distance to, the height above or below, or the size of the primary tank are reasons for using a day tank. All diesel engines have limitations as to fuel lift capability (or fuel draw restriction), fuel head pressure (both supply and return) and fuel supply temperature. The fuel is transferred from the primary tank to the day tank using a transfer pump often controlled by an automatic system utilizing level sensors in the day tank. If the tank is small, the fuel return is pumped back into the primary fuel tank to avoid overheating of the fuel.

Sub–base tanks: Usually larger than day tanks, these tanks are either built into the base frame of the generator set or constructed so that the generator set chassis can be mounted directly onto it. These tanks hold an amount of fuel for a specified number of hours of operation such as 12 or 24 hour sub–base tank. Sub–base tanks are often dual–wall, incorporating a secondary tank around the fuel container for the purpose of fuel containment in case of a primary tank leak. Many local regulations require secondary fuel containment such as dual–wall construction along with full monitoring of primary and secondary containers.

From - Application Manual – Liquid Cooled Generator Sets (Cummins Power Generation)

Environmental Considerations (Fire Protection)

In North America, fire protection regulations typically adopt or reference one or more of the National Fire Protection Association (NFPA) standards. These standards cover such requirements for indoor fuel storage capacity, fuel piping systems, the design and construction of fuel tanks, fuel tank locations, diking, and/or safe drainage provisions. Refer to NFPA Standard No. 37, Installation of Stationary Engines. Local fire authorities may have more restrictive requirements or interpretations of requirements than those in the national standards.

From - Application Manual – Liquid Cooled Generator Sets (Cummins Power Generation)