Shoot the moon


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Institution The Masdar Institute has become operational, but other parts of the city are being scaled back.

Institution The Masdar Institute has become operational, but other parts of the city are being scaled back.

The revised master plan for Masdar City contained a lot of optimism and few surprises.

With its vast solar plants, car-free streets, and world-first status as a zero-waste, zero-carbon city in the desert, Masdar City has been the target of skepticism ever since its launch in the heady days of 2006.

But few could forgive the state-owned project for shooting for the moon back then, when developers and designers were just starting out an achieving-the-impossible streak that would last for almost three years. Sure, Masdar City was ambitious, but so was everybody else.

In that sense, the long-awaited revised master plan that hit the streets last week contained few surprises. It was always expected to include scale-backs – despite the protestations of the top dogs at Masdar to the contrary – and changes to such a bold scheme in the current climate were not only likely, they were inevitable.

The first headline from the Masdar camp is the cutting of the monumental bottom line of the project, with an expected 15% or US $3.3 billion, shaved off the final bill by cutting ‘unviable’ technology. The second, of course, is the success so far, including the completion of the first six buildings of the Masdar Institute, residential units that use 54% less water and 51% less electricity than the UAE average, 30% of electricity demand provided by rooftop photovoltaic panels and 75% of the buildings’ hot water provided by rooftop thermal collectors.

That’s the good news – taking up the first page and a half of the press release, of course – but there have been scale backs too. The first thing to go is the personal rapid transit (PRT), or ‘pod car’ network, that was designed to shuttle residents back and forth from their homes. The revised plan abandoned plans for this network to be city wide, limiting its use to inside the grounds of the institute.

A sceptical reader may think that part of that US $3.3 billion saved may have come from this cut back, but Alan Frost, Masdar director, told Construction Week that it was the technology, not the money, that was behind the decision.

“It’s clearly not about the cost, because the cost of the PRT will go down with volume anyway. What we’ve realized is that things like electric buses and taxis and point-to-point technology have changed so quickly in the last two or three years. It doesn’t make sense to lock ourselves into the PRT when we have a two year window before we actually have to put a transport system on the ground for new tenants,” he said.

Gerard Evenden, a senior partner at designers Foster + Partners, added that a lot of the technology used in the PRT system was becoming standard for car manufacturers, and that this would only increase in the next 24 months. For now, the designers are keeping an open mind about potential alternatives.

“We never expected (it) when we began the project, when there were probably only one or two hybrids around, but now the technology is advancing so quickly. We’ve got the PRT up and running and that’s working and shuttling into the city, but what we want to do is widen our search and look at what some of these other manufacturers are doing,” he said.

Learning through time is definitely the message coming out of Masdar in 2010, and Evenden says that other discoveries during the design process have had an effect on the final master plan.

He explains that Masdar is designed around the concept of a triangle, made up of three points – technology, orientation of the buildings, and materials. The two latter points have far more effect than people think, Evenden said.

“With the environment we’ve created up there, as you walk around you will see that the temperature actually feels lower. We’re now getting real data back, which shows the temperature is dramatically falling compared to the centre of Abu Dhabi.

“So what we think is that what we’re doing with the orientation and materials is becoming so successful that hopefully the pedestrian will be able to walk around more, and in the long term, we actually think there will be a reduction in the amount of transportation we need,” he said.

Orientation and materials also happen to be a lot cheaper than technology, and it’s clear that an emphasis on these two points of the triangle will help Masdar City cut its enormous budget. Evenden says that this has a direct affect on contractors, who need to be persuaded of the merits of responsible construction techniques. Such seemingly small factors, he said, are paramount to the final sustainability of the design.

“One of the things that has come out in the production of these buildings is that we also need to be pushing the contractors and pushing forward methods of construction, because it is all about sealing our buildings better, procuring our buildings better, and building them better,” he said.

“Everybody likes to talk about the active systems and the smart systems, but for us that is just a small part of it. That’s the technology on top that produces the power but if you’re not getting the other two components right you’re not going to be successful.”

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Posted by: Joerg Schweizer

Peter is right about the inefficient space use of private cars. One of the problems with PRT was that Masdar's population doubled during the day. There have been large traffic flows from external car-parks to the inside of Masdar. PRT had problems to cope with these flows.
Replacing PRT by private cars will actually worsen the problem as PRT can achieve higher transport capacities than a car with a human driver, in particular at intersections with traffic lights (roundabouts would take up too much space).
I am baffled by the reason given why PRT will not be extended -- hoping that the less efficient private cars will become as smart as a PRT.
Most likely some sort of larger electric buses need to be introduced (as BRT or shuttle services) in order to handle the traffic flows and reduce parking space.
I guess the real reason for this move back to conventional is that the car-industry did not want PRT to succeed on an urban scale and tried to gain time to develop their solutions.

Posted by: Tommy Texas

They may merely be keeping their PRT options open. JPODS, for instance, uses much lighter vehicles which hang from an overhead track. Vectus vehicles are much simpler and cheaper than the 2GetThere and Ultra type vehicles as well. Vectus has linear induction motors built into the track so the track will be the most expensive part of the Vectus system while its vehicles will be the cheapest of the of the options. Taxi2000 (aka Sky Loop) will be similar to Vectus but the company seems to be on less solid financial ground to me (that's just my opinion, no facts to back that up). They haven't yet built a full scale test track as Vectus has so it's harder to recommend them.

My money is on the JPODS system due to the simple design and light vehicles but time will tell.

I hope that Masdar City gets a world class PRT system working for the masses, not just the elites inside the complex.

Posted by: Peter Muller

Any sustainability comparison of PRT with electric or hybrid cars must take into account the fundamental difference between a public system and a private one. In the one each vehicle will do fifty or more trips a day. In the other each vehicle will seldom do more than five or six. Private systems therefore require many more vehicles and much more space and infrastructure to store them when not in use (each car requires about four parking spaces). The extra vehicles and infrastructure are hardly sustainable.

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