Waste heat operated hybrid (MEDAD) desalination plant: An experimental investigation

Muhammad Wakil Shahzad, Kyaw Thu, Jayaprakash Saththasivam, Won Gee Chun, Kim Choon Ng

Research output: Contribution to conferencePaper

Abstract

This paper presents an advanced desalination cycle called "MEDAD" desalination which is a hybrid of the traditional multi-effect distillation (MED) and the newly-patented adsorption cycle (AD). The combined cycles break the operating regime of conventional MED system and allow some stages to operate below ambient temperature, as low as 5°C in contrast to the conventional MED: The MEDAD cycle results in a quantum increase of distillate production at the same top-brine condition. Being lower than the ambient temperature for the bottom stages of hybrid, ambient energy can now be scavenged by the MED processes whilst the AD cycle is powered by low temperature waste heat from exhaust or renewable sources. In this paper, we present the experiments of a 3-stage MED and MEDAD plants that were fabricated and installed in the air-conditioning laboratory of the National University of Singapore. These plants have been tested at assorted heat source temperatures from 15°C to 70°C. All system states are monitored including the stages temperature and distillate production. It is observed that the synergetic matching of MEDAD cycle led to a quantum increase in distillate production, up to 2.5 to 3 folds vis-a-vis to a conventional MED of the same rating.

Original languageEnglish
Publication statusPublished - Jan 1 2014
Externally publishedYes
Event7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014 - Jeju Island, Korea, Republic of
Duration: May 18 2014May 21 2014

Other

Other7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014
CountryKorea, Republic of
CityJeju Island
Period5/18/145/21/14

Fingerprint

waste heat
distillation
Waste heat
Desalination
Distillation
cycles
ambient temperature
Temperature
Singapore
air conditioning
ratings
heat sources
Air conditioning
Adsorption
adsorption
temperature

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Control and Systems Engineering
  • Mechanical Engineering

Cite this

Shahzad, M. W., Thu, K., Saththasivam, J., Chun, W. G., & Ng, K. C. (2014). Waste heat operated hybrid (MEDAD) desalination plant: An experimental investigation. Paper presented at 7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014, Jeju Island, Korea, Republic of.

Waste heat operated hybrid (MEDAD) desalination plant : An experimental investigation. / Shahzad, Muhammad Wakil; Thu, Kyaw; Saththasivam, Jayaprakash; Chun, Won Gee; Ng, Kim Choon.

2014. Paper presented at 7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014, Jeju Island, Korea, Republic of.

Research output: Contribution to conferencePaper

Shahzad, MW, Thu, K, Saththasivam, J, Chun, WG & Ng, KC 2014, 'Waste heat operated hybrid (MEDAD) desalination plant: An experimental investigation', Paper presented at 7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014, Jeju Island, Korea, Republic of, 5/18/14 - 5/21/14.
Shahzad MW, Thu K, Saththasivam J, Chun WG, Ng KC. Waste heat operated hybrid (MEDAD) desalination plant: An experimental investigation. 2014. Paper presented at 7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014, Jeju Island, Korea, Republic of.
Shahzad, Muhammad Wakil ; Thu, Kyaw ; Saththasivam, Jayaprakash ; Chun, Won Gee ; Ng, Kim Choon. / Waste heat operated hybrid (MEDAD) desalination plant : An experimental investigation. Paper presented at 7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014, Jeju Island, Korea, Republic of.
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