Sweat to energy

I have often wondered if my furious spinning workout could be of greater value that just a great cardio session. The following article provides some great answers. I recall one of my extreme ideas while working on a social housing project, I thought about the potential  for an in-house gym to generate electricity for the occupants. Dwellers would be able to discount their energy bill by the amount of energy they could generate from an exercise bike. A healthy workout AND free energy – win-win scenario… but how possible is it really??

READ ARTICLE.

In summary… A fit person would generate approximately 100 Watts per hour which is about enough to power a television for the same amount of time…

Let’s assume that the average piece of exercise equipment is in use 5 hours a day, 365 days a year. If each patron generates 100 watts while using it, that machine creates some 183 kilowatt-hours of electricity a year. Commercial power costs about 10 cents per kilowatt-hour on average in the United States, so the electricity produced in a year from one machine is worth about US $18 dollars. (quoted from article)

The cost of the equipment is around $1000 (2011) which achieves a payback of 55 years!! Not quite award winning results.

Improvements in the efficiency of the technology may make this feasible in future but for now, it’s a nicer idea than its actually worth.

Subterranean city space

life from the bottom

Source: METRO, 24 Jan 2014

This article appeared in the METRO paper this morning. James Ramsey of RAAD Studio is proposing a park below ground in an old trolley terminal, Lower East Side, New York. The ‘Low-line‘ is similar in concept to the popular New York ‘High-line‘, a public green pathway situated on a historic freight rail-track. The concept of living below ground is an interesting one. A primary benefit is preservation of land area above ground. However, as the author notes, much is required to make an underground habitat viable – artificial light and ventilation and the most obvious. RAAD studio has come up with some ingenious solutions for their subterranean public space.

Matthew Carmona (Prof. of Urban Planning at the Bartlett, London) makes a valid point though: ‘To my mind the ‘Pop down Project‘ is more interesting (than the ‘Lowline project’). Mushrooms underground seems more fitting than trying to make greenery blossom below our streets.’

The reality is that urban space is increasingly valuable and designers are thinking of clever ways of maximizing what little area there is left. In London many home-owners resort to digging down to create additional rooms. 

Source: Kamvari Architects

Building below ground is also useful for regulating temperature, and the concept is certainly not a new one. There are a number of examples of dwellings constructed underground in places of extreme hot and cold climates. Read more about these fascinating places here: http://listverse.com/2013/01/22/10-amazing-underground-cities/.

Car-less cities… an urban dream?

The much debated subject of city transport results in a number of proposals for car-free cities / pedestrian & cycle-friendly streets and efficient public transport schemes.  An American study reckons that trucks and light vehicles contribute 60% of US transportation emissions, which in turn account for 30% of all the nation’s carbon emissions.

Graph: Total transportation carbon Emissions (USA)

Each year, the average car sends 7 tons of carbon dioxide into the atmosphere—about three and a half times the vehicle’s weight.  – Source

Advancements in technology will result in reduced carbon emissions:

  1. Improvements to vehicle technology means that cars can go further on a tank of gas.
  2. Biodiesel = cleaner fuel. (problem is that with food scarcity a growing grobal concern, any crops dedicated for fuel results in less food production area!)
  3. electric car technology becomes more affordable (The problem with electric cars is that electricity is still predominately reliant on the burning of fossil fuels – coal! However, opportunities of solar-electrically powered cars are very exciting.)

All this improved vehicle technology is great, BUT car travel is still much less efficient than public transport…

Carfree.com is a website dedicated to discussing the possibilities for car-free societies. The author lists the following problems with motor-dominated streets:

  • Kills street life
  • Damages the social fabric of communities
  • Isolates people
  • Fosters suburban sprawl
  • Endangers other street users
  • Blots the city’s beauty
  • Disturbs people with its noise
  • Causes air pollution
  • Slaughters thousands every year
  • Exacerbates global warming
  • Wastes energy and natural resources
  • Impoverishes nations

THE SOLUTION…?

Venice is an example of a car-free city. Narrow streets and walkways and canals are the only transport routes, with delivery vehicles limited to early hours of the mornings on certain days of the week. While Venice is not the model answer – obviously the context here is unique, the experience as a pedestrian is quite peaceful!

Image

photo: Nathan Palmer

The appeal of the car is generally speed and convenience – a door to door travel solution. If car-free cities are to work, or more likely – car-reduced cities, the alternative must be efficient and pleasant. For public transport to achieve this and be feasible, cities need to be dense. Transport users will not want to walk for longer than 10 minutes to get to a train or bus station.

The city of Oxford, UK has set up a number of PARK-AND-RIDE stations on the perimeter of the city to discourage the traffic congestion which has become an increasing problem for the city. Commuters park for a nominal fee and use regular buses to get to their places of work in the city centre.

Image

Image

Hamburg in Germany has recently unveiled their plan to make the city car-free in 20 years. The idea is to link the many green spaces in the city with cycle and pedestrian paths. Read the full article on Arch daily here.

Image

Wikipedia has a list of car-free places here.

Hello World!

SUSTAINABLE!! Its a buzz word for sure! What does it actually mean and why the fuss?!

At its core, sustainability is about our consumption of resources.  The environments ability to replenish the source of material / energy such that the use of it is not depleted faster that it can be reproduced. Sustainability is informed by three key areas as shown in the diagram below…
Sustainable development diagram
My experience in architecture alerted me to the wastefulness that accompanies many design decisions and I realized a desire to investigate alternatives. Where to start though! There is SO much information on the internet and given the rise of the GREEN TREND it has become tricky to decipher genuine, high impact options from ‘green bling’ or suppliers claiming that their goods are environmentally friendly to increase sales.
There are a variety of codes and guidelines to assist professionals in creating architecture that is much improved on previous decades of high carbon, energy-sapping structures. LEED, BREEAM, Passivhaus, Code for Sustainable Homes, to name a few of the more useful. Different countries and climates require different strategies so that adds to the complexity. There is no simple, blanket solution… each building has its own challenges and priorities relating to the CONTEXT!! Key word that!!
There are many stages of a buildings life-cycle that require informed, sustainable decisions. The diagram below including my sketchy notes is useful for highlighting what these are:
Building process diagram showing additional stages of ‘Occupancy Evaluation’ and ‘Soft Landings’ to assist occupants to maximize energy efficiency and thermal comfort.
Studying the MSc Sustainable Building: Performance and Design at Oxford Brookes opened my eyes to the many solutions and problems in the quest for more efficient and comfortable buildings but also left me with many questions. Informed questions… so I now know WHAT I should ask and have a better idea of when I should be skeptical of so-called solutions. This has led to my creating this blog – continued research and general curiosity – and I hope that my journey will help you and others to grown in knowledge of the subject!
I plan to split my post content between 4 subject headers. This is based on a summarized version of the courses I studied on the MSc SB:PD:

SUSTAINABLE DESIGN IN CONTEXT
– a critical look at example buildings that embody sustainable principles
BUILDING FABRIC
– investigations into various building materials, their thermal conductivity and impact on the environment
LOW CARBON TECHNOLOGIES
– components of the buildings that improve energy efficiency and reduce waste. From Solar PV to composting toilets
POST OCCUPANCY EVALUATION
– Vital to the ongoing research into what works and what doesn’t… assessment of completed buildings at least 1 year into occupation. The cold facts (energy consumption – predicted VS actual) and the warm (or not!) feelings (occupants opinions).

Love the earth. Love people. Love architecture.