Assignment #4: Design For Comfort

Dubai Crescent (Ergoform)

Curitiba Bus Stop in Brazil (Trendland)

To begin thinking about the design of the bus stop I did a simple internet search and came up with a handful of quite interesting and innovative bus stop precedents. The Dubai Crescent project shown to

the right installed a number of sealed glass and steel structures that use mechanical air conditioning to shelter waiting passengers from Dubai’s aggressive daytime heat. Given the relatively inconsequential environmental impact (especially compared to the city’s enormous malls and world’s largest indoor ski slope) I wouldn’t necessarily argue that the airconditioned

bus stops aren’t a practical and cheep solution to keep residents comfortable. But in the desert, which experiences huge daily temperature swings from hot days to cold nights, perhaps large heat sinks could have been utilized to smooth out the peaks.

In the case of the micro-climate around the Culbreth  Road bus stop extreme heat is not the primary obstacle to thermal comfort of temporary inhabitants, especially considering the bus stop’s peak usage will only be when school is in session and in the daytime and late afternoon hours.Assignment 4 stereographic solar projectionAssignment 4 orthographic solar projection

The psychrometric charts reveal that cold winters will be a major design challenge. This is particularly difficult to overcome as passive heating techniques quickly loose efficacy below 50ºF. This leaves about 75% of the time outside the comfort zone during the winter. Its possible that I may have to consider the implementation of heat pumps for the particularly brutal cold nights when fellow a-schoolers are waiting to head home at 2am. The summer on the other hand will benefit frAssignment 4 psychrometric winterom cooling via air circulation which a you can see from the wind rose diagrams below.Assignment 4 psychrometric summer

The sharp edge condition of the parking garage in conjunction with the railroad and grounds lawn clearings funnel accelerated winds straight through the site. In both the summer and winter months the prevailing winds are primarily coming from the south-south west with more violent and erratic speed spikes occurring in the winter.Assignment 4 Wind Diagram-02

Bus Stop Design:

My intervention will incorporate various design features to expand the thermal comfort zone for waiting passengers. All design elements are passive; following the logic that it is-after all-just a bus stop and the 15 minute-or-so wait in a low traffic bus corridor does not justify the implementation of expensive measures such as photovoltaics or geothermal conditioning.

bus stop plan-01

bus stop render 2.2

My aim was focused on keeping the thermal bubble warm in the winter and pleasant in the fall and spring under the assumption that in the hottest months of the summer, the primary users of the bus stop–students–wouldn’t be around. I also kept my primary focus on regulating wind flows and shading as these two factors play the largest role in determining the thermal conditions of this particular system. bus stop render 1.2

Sources:

Foiret, Cyril. Creative Bus Stop Design. Trendland. http://trendland.com/creative-bus-stop-design/

Crescent: Dubai AC Bus Shelter. Ergoform: Think. Create. http://ergoform.in/urban-design/crescent-dubai-ac-bus-shelter/

Advertisements

Leave a comment

Filed under Uncategorized

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com 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