Design Journal Entry - Module 3

Goal 1: Functional without Grid Energy

• Measure:  daylight hours and comfort hours (as measured by predictive mean vote, adjusted for thermal preferences of people in the region )
• Note: these are paired because they sometimes counteract one another, and an appropriate balance will need to be found
• Targets:
• Lighting
• minimum acceptable: acceptable lighting via daylight 50% of working hours, averaged across spaces
• goal: acceptable lighting via daylight 70% of working hours, averaged across spaces
• Thermal Comfort
• minimum acceptable: thermal conditions that map to predictive mean vote of between 2 and -1, 60% of the time
• goal: thermal conditions that map to predictive mean vote of between 2 and -1, 70% of the time
• Strategies:
• Maximizing Daylight Potential
• window openings on both sides on building
• light shelves as needed to minimize glare on south side building
• small, narrow buildings, spaced apart
• play with building heights and sun angles
• skylights
• Thermal Comfort - Natural Cooling and Ventilation
• courtyards and ponds to provide evaporative cooling
• raised roofs to permit release of warm air through roofs
• grates / permeability on higher floors to encourage air to flow out through roofs
• window openings on both sides to permit cross ventilation
• “dust catchers” to minimize irritation due to dust
• well landscaped area to minimize dust in dry season
• arrange buildings in a way to maximize natural ventilation potential
• Introduce screens/overhangs for rainy season?

Goal 2: Low Cost of Construction and Maintenance

• Measure:  cost of materials and maintenance
• Targets:
• minimum acceptable: 80% of cost materials and 50 year maintenance of a conventional mall in Enugu, i.e. a Shoprite
• goal: < 70% cost of a conventional mall
• Strategies:
• high ratio of compressed earth block to concrete
• max 2 - 3 stories to limit need for additional structural components
• use of bamboo, stone, and locally made tiles and corrugated metal
• strict, regular maintenance regime to limit need for expensive repairs

Goal 3: Comfortable Mobility

• Measure:  pedestrian enjoyment in walking, ability of retail stores to receive inventory
• Targets:
• minimum acceptable: achieve “highly walkable” rating across 50% of relevant factors discussed in Knapskog 2019, Exploring ways of measuring walkability
• goal: achieve “highly walkable” rating across 70% of relevant factors
• Strategies:
• ample foliage
• bus / keke stops located around the site
• outdoor seating
• human scale architecture
• high connectivity of paths
• occasional roads for small motorized vehicles delivering inventory