Friday, September 25, 2009

High Efficiency Energy Saving Lamp

• High energy saving • Protection of eyes • Very quick installation
• Extended life span of 15000 hrs •
High lighting quality • Improved power factor




Saving Comparison Table

* Depending on the fitting, deviation are possible



CASE STUDY



Consider the case of a office in the building with a total of 1000 luminaries using existing lighting of 36W T8 fluorescent lamps and standard electromagnetic ballast. With the T5 Fixture, we can convert the existing system to energy efficient system and calculate the electricity costs saved by the T5 tube.

Many enterprises are aware that their electricity bill is a large portion of their total operating cost, the application of T5 Fixture is simple. The saving rates guaranteed, thus adding to your bottom line profits.

The calculation is based on 24 operation hours per day and 365 days per years for 1000pcs of fluorescent lamp.
Electricity cost per unit (kWh) is $0.3045

Energy Saving Per Fitting = 48W – 28W = 20W

Energy Saving Per day = 20W x 24 hrs x 1000pcs = 480 kWh

Energy Saving Annually = 480 kWh x 365 days = 175,200 kWh

Amount Saved Per Year = 175,200 kWh x $0.3045 = $53,348.40


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Thursday, September 3, 2009

More: Home Energy Audit (Energy Star, US Only)

Home Energy Audits

A home energy audit is often the first step in making your home more efficient. An audit can help you assess how much energy your home uses and evaluate what measures you can take to improve efficiency. But remember, audits alone don't save energy. You need to implement the recommended improvements. ENERGY STAR provides extensive information about home improvement projects to enhance energy efficiency, lower utility bills, and increase comfort.

You can perform a simple energy audit yourself, or have a professional energy auditor perform a more thorough audit.

Do-It-Yourself Audits

If you have five minutes and your last 12 months of utility bills, use the ENERGY STAR Home Energy Yardstick to compare your home's energy efficiency to similar homes across the country and get recommendations for energy-saving home improvements from ENERGY STAR. You will also need to enter some basic information about your home (such as zip code, age, square footage, and number of occupants). If you don't have your bills, contact your utility for a 12-month summary.

Hire a Professional Home Energy Auditor

If you are interested in getting specific recommendations for improving the efficiency of your home, consider contacting a professional Home Energy Auditor. A professional auditor can use a variety of techniques and equipment to determine the energy efficiency of your home. Thorough audits often use equipment such as blower doors, which measure the extent of leaks in the building envelope, and infrared cameras, which reveal hard-to-detect areas of air infiltration and missing insulation.

Your first step should be to contact your utility to see if they offer free or discounted energy audits to their customers. If not, you can hire a home energy professional, such as a certified Home Energy Rater, to evaluate your home's energy efficiency.

To find a Home Energy Rater, visit the ENERGY STAR for Homes Partner Locator.

Home Performance with ENERGY STAR

Where available, Home Performance with ENERGY STAR can help you cost-effectively improve your home's energy efficiency. Specially-trained contractors evaluate your home using state-of-the-art equipment, recommend comprehensive improvements that will yield the best results, and help you to get the work done.

Find out if Home Performance with ENERGY STAR is offered near you.

Home Performance with ENERGY STAR

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Simple Home Energy Audit

An energy audit is an inspection, survey and analysis of energy flows in a building, process or system with the objective of understanding the energy dynamics of the system under study. Typically an energy audit is conducted to seek opportunities to reduce the amount of energy input into the system without negatively affecting the output(s). When the object of study is an occupied building then reducing energy consumption while maintaining or improving human comfort, health and safety are of primary concern. Beyond simply identifying the sources of energy use, an energy audit seeks to prioritize the energy uses according to the greatest to least cost effective opportunities for energy savings.

Home Energy Audit

An energy audit of a home may involve recording various characteristics of the building envelope including the walls, ceilings, floors, doors, windows, and skylights. For each of these components the area and resistance to heat flow (R-value) is measured or estimated. The leakage rate or infiltration of air through the building envelope is of concern which are strongly affected by window construction and quality of door seals such as weatherstripping. The goal of this exercise is to quantify the building's overall thermal performance. A simplified approach called the UA delta-T method [1] can be used for good approximate results. The audit may also assess the efficiency, physical condition, and programming of mechanical systems such as the heating, ventilation, air conditioning equipment, and thermostat.

A home energy audit may include a written report estimating energy use given local climate criteria, thermostat settings, roof overhang, and solar orientation. This could show energy use for a given time period, say a year, and the impact of any suggested improvements per year. The accuracy of energy estimates are greatly improved when the homeowner's billing history is available showing the quantities of electricity, natural gas, fuel oil, or other energy sources consumed over a one or two-year period.

Some of the greatest effects on energy use are user behavior, climate, and age of the home. An energy audit may therefore include an interview of the homeowners to understand their patterns of use over time. The energy billing history from the local utility company can be calibrated using heating degree day and cooling degree day data obtained from recent, local weather data in combination with the thermal energy model of the building. Advances in computer-based thermal modeling can take into account many variables affecting energy use.

A home energy audit is often used to identify cost effective ways to improve the comfort and efficiency of buildings. In addition, homes may qualify for tax credits from local and central governments.

Free energy audits from your utility company are a popular way to save up to 30% on your energy bill... but you can always do it yourself! See it on this video below.

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Simple Way to Save Energy

With the cost of energy skyrocketing, many people are turning to things like solar to shave their power bills. But you donate have to spend 10s of thousands of dollars to make a difference. Money reporter Stacy Johnson explains how little things can make a big difference.




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Wednesday, September 2, 2009

Motor with 60Hz or 50Hz frequency. What is the impact?

Frequency is an electrical power source specifications existing or selected by a particular country. Another thing is the voltage specification or voltage. Selection is determined by what standards they will be adopted by the state, they will be adopted both standards. If using 60 Hz NEMA, IEC will use 50 Hz. Use of motor 60Hz to 50 Hz electrical supply of course there is the influence and vice verse. Frequency of the most influential in the motor rotation in the electricity supply. We need to know how much influence it, what its impact on usability factors, age of motor and advantages or disadvantages.

NEMA and IEC Standard
NEMA standard used in northern America, especially the United States must be added that states that use the technology or buying plants from the United States. Meanwhile, the IEC adopted by some countries in the world except in America. In addition to other standards such as BS2613 British, German VDE and Japanese JIS 0530. Usually another standard that is adopted IEC metric.
NEMA or the National Electrical Manufacturers Association based in the United States.
IEC, International Electrotechnical Commission based in Europe.

Motor Specifications
Below is an example specification of an electric motor as an example for discussion in connection with the use of frequencies. What is difficult to avoid is that we bought a standard NEMA motors to be installed in the country that use IEC standard or vice verse. Requiring knowledge of electricity specifications and mechanical specifications of both standards.

Example: 100HP Motor, 230/460 V, 60 Hz,
Understanding of these specifications, are as follows:
  • NEMA write with horse power capacity, 100 HP as the capacity or ability to move a load by the motor 100 horse power. Usually IEC stated capacity with KW (100 HP = 74.57 KW)
  • 230V, motor winding consists of two sets of each phase and connected in parallel
  • 460V, motor winding consists of two sets of each phase and connected in series.
  • 60Hz, the frequency of electricity networks should be available for these motors.

Effects on Motor 230/460 V, 60 Hz, if the tide on the frequency 50 Hz

Freq pengruhnya

(Retrieved from the table Leeson Motor Catalog)

Install the motor on 60 Hz 50 Hz Frequency
Power-grid in Europe and in almost all other countries use the system frequency 50Hz, except for North America to use 60Hz.

What is the effect of performance, put the motor in the frequency 60Hz. 50Hz? Is safe enough?
The answer to doubt "yes" or maybe "yes no".

3 phase 60Hz motor can be operated quite satisfactorily (in accordance with the nameplate) at 50Hz frequency power supply if the voltage / voltage at the same lower frequency ratio decreased.

So motor 60Hz, 460V at 50Hz, if installed, 380V will produce a satisfactory performance according to nameplate horsepower, and the rotation axis of rotation of 50/60 is only listed on the nameplate. So if 60Hz to 50Hz, that should Voltage 5 / 6 × 460V = 383V

Motor 60Hz 230V at 50Hz if installed 230V, may not satisfy without reducing horsepower for 0,80-0,85 factors. So HP mobilized rated load should be decreased, this relationship with the heat effects arising in the winding.

With the guidance table, it can be concluded that 100HP Motor, 230V/460V, 60 Hz, motor 1800Rpm connected 230V winding mounted on 220V / 50 Hz will occur as follows:
  • Full load torque required 120%
  • Round synchronous stator falls to 5 / 6 or 83.3% of 0833 × 1800 = 1500 Rpm
  • Full load current to 115%
  • Efficiency at full load down 2%
  • Power factor down 3-4%
  • Locked rotor torque rated up from the 130 to 135%
  • Breakdown torque, up from rated to 120 to 125%
  • Locked rotor currents from the rated up to 106%
  • Heat in motor up to 153%
  • Magnetic noise increases.
The conclusion of this case that the motor decreases as age increases, which means increasing the heat.
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