Can Bloom Energy transform the energy equation?

March 8, 2010

a version of this appeared in mint on 9th Mar 2010 at

Srinivasan – bloom energy – v4

Can Bloom Energy transform the energy equation?

Rajeev Srinivasan

Bloom Energy has excited techno-watchers. Led by Dr K R Sridhar, a graduate of Madras University, who developed comparable technology for NASA’s space missions, this stealth clean-tech startup—which raised $400 million in venture capital—hit the airwaves with an awe-struck report on American national TV last month. Its vision is compelling: a solid-oxide fuel cell based on a high-temperature chemical reaction between oxygen and hydrogen or a hydrocarbon fuel, with no combustion.

A box the size of a toaster could eventually power a home at twice the efficiency of a traditional gas-burning system, with 60% fewer emissions. A small-truck-sized server supplies 100 kilowatt, enough for an office building. Several have been installed at beta-test sites such as eBay and Google.

The key technology is a stack of floppy-disk-sized zirconium-oxide electrodes, coated with proprietary inks. The electrodes are not made of precious metals, but from sand using a low-end semiconductor process.

There are many reasons why this idea has great potential. One, it can be “off-grid”, that is, it can be used remotely with no infrastructure. Two, it is “fuel-agnostic”, that is, it can run on any hydrocarbon such as propane, natural gas, ethanol, bio-diesel, or biogas or farm waste (for instance, methane). Three, remarkably, the process is “reversible”, which means it can take in renewable energy from solar or wind and create storable oxygen and hydrogen, which can then be combined to generate electricity at night or when there is no wind (or used in a hydrogen-powered vehicle).

Especially for energy-starved India, the implications are huge: Without expensive transmission networks, and at reduced emission levels, it may be possible to produce power at grid-comparable prices. This could be a technological leap–frog, just as in cellular telephony where India bypassed the expense of copper wire in the ground. India could avoid large infrastructural sunk costs while providing hitherto unreached citizens with electricity.

The current Indian grid is anyway not reliable, with endemic power cuts and brownouts; the ubiquitous diesel generator is testimony to that. Replacing dirty, noisy generators with efficient Bloom servers could be a good idea. Even better, rural users could harness gobar gas and other local by-products instead of imported hydrocarbons.

Bloom also brings the robustness and reliability of a distributed network compared to a centralized one. One of the nightmare scenarios strategic planners worry about is that of cyber-attackers hijacking the energy grid of a nation and bringing it to its knees.

There are other intriguing possibilities: the provision of electricity on-demand, comparable to “cloud-computing” using server farms. Bloom consciously uses the terminology of servers and farms; and Google, cloud-computing pioneer and early adopter of Bloom’s technology, has just received a license to sell energy. Maybe Google Power and others will soon compete with national grids.

There is enthusiasm about the possible benefits, but there are also obstacles in Bloom Energy’s path. The most significant is cost, now running at $750,000 for a 100-kilowatt server; although Sridhar estimates that larger volumes can bring this down to $3000 for a home unit in 5-10 years. Since they have had beta sites for some time, many engineering issues must have been worked out. But some remain: can it deal with India’s dust? How do you store generated hydrogen without it exploding?

The proof will be in the pudding. However, there are bad precedents: the fabled Segway was supposed to transform personal transport; Motorola’s 77-satellite Iridium project was meant to revolutionize wireless telephony—both were expensive flops. But skepticism aside, if Bloom can drive down costs, this technology could well be a boon. It could be the proverbial game-changer.

Rajeev Srinivasan is a management consultant focusing on innovation and energy. Comment at


Leave a Reply

Please log in using one of these methods to post your comment: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: