ESolar To Branch Into Module Molten Salt Plants

July 6, 2010

Solar thermal has been hot lately (pardon the pun).

This weekend, President Obama doled out $1.45 billion in loan guarantees for Abengoa’s 250 MW, molten-salt farm in Gila Bend, Arizona. Two months earlier, the Department of Energy dispatched another $62 million for technology development and component design.

Among the winners of the DOE award were Pratt & Whitney’s Rocketdyne, Abengoa and eSolar – which finally last week elaborated on the project it has underway with Babcock & Wilcox.  The two companies will use $10.8 million in funding to build and test modular plant components, including a molten-salt receiver, a molten salt to steam heat exchanger and a molten-salt storage system.

The move to molten salt is new direction for eSolar, which up to now has relied on directly heating water to produce steam. The funding will “accelerate the research and development of (the) economic storage” of solar thermal power generation capacity to extend the operating range of plants, says eSolar CEO John Van Scoter.

But despite the new funding, all is not well in the industry. Falling photovoltaic prices pressure plant development at a time when vendors struggle to find financing for a new generation of tower-oriented farms.

These pressures already resulted in the cancellation of two eSolar project, according to a published reports, including one on Green Wombat. PG&E decided to scale back the Alpine SunTower farm in California and replace eSolar’s field of heliostats with PV panels.

A second New Mexico facility where El Paso Electric is to receive power also is switching to PV.

ESolar and partner NRG Energy said in a statement that downsizing the California plant from 92 MW to 66 MW was the result of limited transmission capacity at the site.

But more than transmission, the challenge for solar-thermal developers is low-cost solar panels. PV prices fell sharply last year, and plant financing has become easier. Perhaps the DOE recognized this with its May funding awards urging the developing of lower cost solar thermal technology. According to eSolar, the goal of its work with Babcock and Wilcox will be to achieve the lowest levelized electricity cost of any utility scale solar thermal plant.

That means allowing plant components to be built in a factory and shipped fully assembled to a site. This will simplify permitting and construction.

The completion of the work with Babcock & Wilcox is 2.5 years away. Seems as if there is no time to waste.


Energy Retrofitter Recurve Unveils Software For Energy Contractors

April 19, 2010

Home energy retrofits are beginning to seep into the American consciousness. Contractors, though still small and few in number, report encouraging growth.

The PACE financing program in San Francisco and soon elsewhere in California, should draw new builders into the business. PACE, or Property Assessed Clean Energy, allows homeowners to borrow for their energy improvements and repay the loans as if they were tax bills.

The energy audit software should enable Recurve and contractors who use to conduct more audits and run energy simulations on site.

In Washington, D.C., President Obama’s $6 billion energy retrofit program, Home Star, is moving toward a vote in the House. The program would offer $3,000 rebates for home efficiency improvements.

The stars would seem to be aligning. “We just see this industry exploding,” says Adam Winter, co-founder and senior vice president at Recurve, a San Francisco home energy remodeler. “We see such opportunity in the market right now.”

And yet, even as more Americans turn to home retrofits in the battle against global warming, the industry will face a new hurdle: getting all the work done. Up to now, energy remodeling has been a labor intensive, time-consuming process. Recuve acknowledges that the first step – a home energy audit – can be a three-hour inspection, at the end of which an inspector returns to the office, enters pencil-written notes into a computer and runs an energy simulation.

Recurve says it is time to replace manual with automation. The company announced Monday a suite of software it hopes will simplify retrofits for contracts across the country. The software is still in beta testing, but is anticipated to be available commercially by the end of the third quarter.

The program will enable inspectors to enter data in a laptop while in the field, run simulations immediately and present homeowners with instant price quotes. Instead of two or three audits a week, they should be able to four or five, says Winter.

Recurve’s goal is to be the software powerhouse selling its product (and online service) to businesses getting into energy remodeling. It has been testing the software in house for six months and for three months with six partners. As of Monday, it will expand the testing to several dozen. A handful of other programs are available to contractors, but the company claims its offering is more comprehensive.

What’s more, several other software modules are under development to expand its capabilities, including programs to keep track of customer leads, to manage projects and to enforce best practices in the field.

The company has always had the vision of being a software provider, says Winter, from the day it was founded.


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