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How HE Results In Cost Saving - an Eltek Case Study

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Information about How HE Results In Cost Saving - an Eltek Case Study
Technology

Published on March 5, 2014

Author: Eltek

Source: slideshare.net

Description

Major UK Wireless Carriers Reduce Power Consumption and Operating
Expense with High Efficiency Power Systems from Eltek Valere
An Eltek Valere Case Study
Many carriers are realizing increasing power consumption and costs as they
move to new content- and data-oriented services and expand their wireless
networks to include 3G and 4G technologies. Managing this power consumption
is a critical initiative for these carriers to stay cost competitive. Increasingly,
carriers are evaluating power system technology as a key part of their efforts
toward making a significant impact on power consumption, because
approximately 80% of the power consumed by a telecommunications carrier
passes through these devices.
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  Major UK Wireless Carriers Reduce Power Consumption and Operating Expense with High Efficiency Power Systems from Eltek Valere An Eltek Valere Case Study Many carriers are realizing increasing power consumption and costs as they move to new content- and data-oriented services and expand their wireless networks to include 3G and 4G technologies. Managing this power consumption is a critical initiative for these carriers to stay cost competitive. Increasingly, carriers are evaluating power system technology as a key part of their efforts toward making a significant impact on power consumption, because approximately 80% of the power consumed by a telecommunications carrier passes through these devices. The issue with these systems is power conversion efficiency, which is a measure of the amount of power that is lost (as heat) during the conversion from AC mains power to the 48V DC that is needed by the load. In recent years, that power efficiency has been at between 90% and 92% resulting in power losses of up to 10%. Recognizing the impact that power systems can have on power consumption, Eltek Valere has pioneered the market for high efficiency (HE) power systems that offer 96% power conversion efficiency. These systems cut wasted power by 50% compared to competitive systems. These systems are now being trialed and adopted by carriers across the world with great results. In the UK, two wireless carriers have trialed the Flatpack2 HE system recently and have decided to move forward with deployment based on those successful evaluations. This case study reports the results of one of those trials. TEST SET UP In this evaluation, a major UK mobile carrier set up a trial on three mobile sites. At each of these sites, the carrier had an Eltek Valere Flatpack2 power system, with three standard rectifiers featuring 92% efficiency. For a week, they replaced the rectifiers in those systems with Flatpack2 High Efficiency rectifiers and measured the reduction in power consumption. While the average power levels and consumption patterns varied, in all of the sites, the power consumption was typical of a base station, with a load of about 2kW that was shared between the three rectifiers.   www.eltekvalere.com     AN ELTEK VALERE CASE STUDY

Reduce Power Consumption and Operating Expense with High Efficiency Power Systems from Eltek Valere   TEST DATA The tests measured how much power had to be drawn from the mains to power the load and then measured the actual costs savings per annum resulting from the higher efficiency rectifiers. In one base station, the average power consumption before the HE rectifiers were installed was 2.03396 kWh; but after the HE system was installed that average dropped to 1.905606 kWh. The resulting 4.88% power decrease (0.9779 kWh) resulted in a cost savings of £107.08 (€119.95) per annum. At the second base station, the average power level was higher, at 2.24713 kWh with the standard rectifiers. The move to the HE rectifiers brought power consumption down to 2.188096 kWh, a power savings of 2.63% (0.059034 kWh) that resulted in a cost savings of £64.64 (€72.41) At the third base station, average power consumption with the standard rectifiers was 1.677525 kWh - significantly lower than in the other two base stations. However, the demand spikes were much higher than in the other examples, rising from about 1.5 kWh to more than 2.25 kWh on a consistent basis. When the HE technology was introduced to this site, power consumption decreased to 1.610024 kWh on average for a 4.02% power savings (0.067501 kWh) and a £73.91 (€82.79) annual cost savings. Overall, the carrier was quite pleased by the results. On average, they saw a 3.84% reduction in power consumption with an average savings of £82 (€91.85) per site per year. FLATPACK2 HE Flatpack2 HE power systems are based on the hot-plug, digital switched-mode Flatpack2 HE rectifier that operates on a wide range of input voltages (85 to 290VAC) and outputs 2000W at 48V DC or 24V DC. A 19” power shelf holds up to four Flatpack2 HE rectifiers and mounts in either 19” or 23” telecommunications racks. System control is provided by Eltek Valere’s Smartpack controller, which delivers powerful, cost-effective control and monitoring via a simple front display and sophisticated computer interface. The controller delivers comprehensive information and in-depth system management. Flatpack2 HE system distribution bays features both breaker and bulk output landings and have low-voltage disconnect (LVD) options. A unique three-bus breaker panel provides a convenient manner in which to power equipment from up to three different voltage types (e.g., converter output) or arrange distribution to load equipment and batteries in a variety of ways.   www.eltekvalere.com     AN ELTEK VALERE CASE STUDY

Reduce Power Consumption and Operating Expense with High Efficiency Power Systems from Eltek Valere   Carrier power consumption is increasing and must be managed appropriately. Moving to Eltek Valere Flatpack2 HE power systems can make a dramatic difference saving up to 5% of the power needed for network systems and resulting in cost savings of £100’s per base station. These savings are significant on their own, but when multiplied across an entire wireless network, they become a compelling way for carriers to ensure they have the power they need to deliver the next-generation services to satisfy their customers and reduce Co2 for the environment. Eltek Valere – Drammen, Norway – February 2010 www.eltekvalere.com     Headquarters: Eltek Valere Gråterudveien 8, 3036 Drammen Phone: +47 32 20 32 00 Fax: +47 32 20 32 10  

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