It was bright and sunny in the Los Angeles area, the kind of summer day the Chamber of Commerce likes to trumpet. Convertible tops were down on the freeways, tourists behind sunglasses were taking in the sights and residents accustomed to the warm, balmy weather were attired in cotton comfort.
Distributed generation allows for the use of small-scale power generation technologies located nearby the load being served. It can be applied in many different forms. There are various methods by which customers can generate their own electricity, with or without the backup grid.
An important consideration for any “green” building is its electric power supply. Commercial buildings currently consume more than one-third of the total electric energy produced in the United States. The U.S.
A 500-kilowatt solar power system supplements 15 percent peak power to water treatment operations in northern New Jersey. A 250 kW fuel cell helps manage electricity demand and address ongoing air-quality concerns at a Southern California water reclamation plant.
Solar-power cells, also known as photovoltaics (PV), are semiconductors that convert sunlight directly to direct current (DC) electric power. “The sun’s light dislodges free electrons in each cell on the solar panel and collects them on conductors to create a volt.
Photovoltaics (PV) have a sunny future in the building industry. After a number of false starts over the past 30 plus years, PV has the potential to become a significant contributor to the U.S. energy supply in the coming decades.
The Leadership in Energy and Environmental Design (LEED) recognizes the contribution that photovoltaics (PV) make to the sustainability and efficiency of a building project through its Green Building Rating System for New Construction & Major Renovations (LEED-NC Version 2.1).
Up to 2,500 megawatts (mw) of wind energy capacity are scheduled to come online in the United States this year, bringing new power to the equivalent of 700,000 homes and injecting more than $3 billion of investment into the power generation sector. Wind power has truly become a reality.
Photovoltaic (PV) installations are becoming more common in commercial and residential buildings as PV-system efficiencies increase, installed costs decrease and cost of conventional utility-supplied electric power increases.
Energy codes establish the minimum requirements for the performance of new buildings. States have typically adopted either the ASHRAE/IESNA Standard 90.1 or the International Energy Conservation Code (IECC) as their energy code for commercial buildings.
A utility-interactive photovoltaic (PV) system is defined in Section 690.2 of the National Electrical Code (NEC) (NFPA 70-2005) as a “photovoltaic system that operates in parallel with and may deliver power to an electrical production and distribution network.” NEC Article 690 covers Solar Photovol
The surface of the earth receives a tremendous amount of energy from the sun. It is estimated that the amount of solar energy that strikes the earth's surface daily is greater than the amount of energy used worldwide in 25 years.