MIT2_500s09_sw01_report

MIT2_500s09_sw01_report - MIT OpenCourseWare...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: MIT OpenCourseWare http://ocw.mit.edu 2.500 Desalination and Water Purification Spring 2009 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms . MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Mechanical Engineering 2.500 Desalination and Water Purification Professor John H. Lienhard V Spring 2009 Purification of Water in Phaeton and Paulette, Haiti May 14, 2009 Abstract Phaeton and Paulette, two small villages in the northeast part of the Haitian coastline, currently suffer from a lack of available freshwater for personal con- sumption. This paper looks at methods for improving the water supply through desalination techniques and rainwater collection. Mercy and Shairing, a non- profit NGO, hopes to take recommendations and implement the best solution in these two villages. Unfortunately, both villages are subject to abject poverty and cost is the major limiting factor when considering possible improvements to the existing water infratstructure. Humidification-dehumidification (HDH) and reverse osmosis (RO) were the only two desalinations that appeared to be viable options for the area. HDH proved to be too expensive without locally available and inexpensive sources of energy. RO is quite cost competitive with existing supply ($0 . 017 /bucket vs. existing $0 . 024 /bucket ) provided a financing plan can be arranged. Rainwater collection is a viable option for improving the existing water supply, but will not completely solve the problem. By renovating and ex- panding the existing 100 m 3 cistern, up to 462 m 3 of water can be collected each year. Basic treatment can be added to the cistern to improve the quality of the water. It is our recommendation that if the water quality problem is to be solved as completely as possible that a community-wide RO plant be implemented and the water be sold at cost to pay for the plants maintenance and security. i Contents 1 Introduction 1 1.1 Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 Desalination Processes 3 2.1 Humidification Dehumidification . . . . . . . . . . . . . . . . . . . 3 2.1.1 HDH Cycle Selection . . . . . . . . . . . . . . . . . . . . . . 3 2.1.2 Power Sources . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1.3 Component Design . . . . . . . . . . . . . . . . . . . . . . . 5 2.1.4 Cost Estimates . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1.5 Advantages . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1.6 Disadvantages . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 Reverse Osmosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2.2 Plant Design . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2.3 Cost Considerations . . . . . . . . . . . . . . . . . . . . . . 7 2.2.4 Sociopolitical Considerations and Operation...
View Full Document

Page1 / 23

MIT2_500s09_sw01_report - MIT OpenCourseWare...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online