Download Group Status Reports - Design and Dissemination - Lecture Notes and more Study notes Development Economics in PDF only on Docsity! Group Status Reports / Brainstorming Design specs with metrics and units are due in a week – if still hunting details on particular specs, specify the expected unit at a minimum. Plan for this class session: • Group status reports on Problem Statements: 60 minutes • Group brainstorming: 30 minutes Case tracking Problem statement • What level of education/training assumed for the users? • Where is data input? At the home (w/ PDA) vs. back at office? That’s part of the design spec. • What does “monitor patients” mean? Design spec brainstorming • Currently have direction on GUI guidelines; PDA client vs. paper forms; functionality of what to track?; Security / privacy of access to data – password, smartcard, etc.; Evaluation plan; Training and support • Questions: Missing scale, cost per user, compatibility with databases and standards. Try to make specs as quantitative and testable as you can. Run of River Micro-Hydro Problem statement • Clarified problem is village scale. Make sure the problem states that the primary target is villages that don’t have power (developing country) • Need to define types of rivers – i.e. will the system only work for a permanent river, not with rivers that are dry part of the year? Design spec brainstorming • Scale: roughly, ½ kW or 1000 kW? • Currently includes cost, application scoping (flow ranges, etc), size and transportability, and maintenance/operations features. • Questions: how the flow rate is best specified; what happens in flood situations; need to add quantitative aspect for head-drop, turbidity, weight, and if still not sure list it as ‘TBD’ to help monitor open issues. Docsity.com Solar Water Disinfection Problem statement • Includes “quick,” “inexpensive,” “easy,” “Third World households” – need to clarify/quantify what these mean. • Specify rural vs. urban? They want to consider both environments. Design spec • Having trouble quantifying many aspects. Single day process via 50 deg C for one hour per day is a known target. • TBD maintainability vs. cheap/easy to replace • Cost metric: $/liter disinfected. • Need to quantify alternatives in terms of cost, effectiveness, performance (effort per liter), as background for the spec. • Comments that UV transmission is also important to disinfection, not just temperature. • Consider breakability (will it shatter in accident) and durability/lifetime in “normal use?” • What expectations for batch size? Water Collection Problem statement • Defined as supporting the multiple uses for rural households with subsistence farms in developing countries. • This will leave many tradeoffs and balances TBD. To get to a design spec, probably will need to select some typical households, communities, water quality/water source issues. Note this is often the case for water systems -- one needs to get pretty specific about the application. • Team has selected a “systems approach” – background on drawbacks of existing schemes, comparisons, will be helpful in getting to the design spec. Design spec • Based on partners, have selected Brazil and India and 600 L / day target. • Currently broad scope treatment of turbidity, bacteria, and industrial chemicals; also would like to scale from single household to small community • List of metrics: cost, time and effort to transport water, disinfection effectiveness, local manufacture materials, sustainability of production. • Suggestion: segment the functions by usage type, i.e. irrigation and cattle watering don’t need the same level of disinfection as human drinking. Docsity.com
