Abstract
Thermoelectric Refrigeration Membrane Distillation (TERMD) is an emerging membrane-based evaporation technology with excellent prospects for separation industries. However, the development of the TERMD system was further limited by excellent membrane component properties. In this paper, a cold chamber component of a TERMD is manufactured. Then, the cooling performance of the component is studied to examine the coupling between the Thermoelectric Refrigeration (TER) and the Membrane Distillation (MD) process. Moreover, the effects of the membrane components properties are studied by changing the water flow rate, and the input current of thermoelectric refrigeration. The results showed that when the TERMD cold room inlet current is maintained stable and the heat dissipation intensity increases, the cooling temperature gradually decreases. Also, the temperature on the cold side tends to stabilize while the flow rate exceeds 600 L/h. In addition, the input power decreases as the heat dissipation intensity increases in the cooling dissipation intensity of the Thermoelectric Refrigeration Component (TERC) cold chamber is kept stable. And, the input power will reach a critical value while the water volume flow rate is over 500 L/h. Furthermore, the cooling rate reaches the maximum of 1.59 at the water volume flow rate of 700 L/h while the operating current of the TERC is 12 A. It is concluded that the thermoelectric refrigeration component can supply great refrigeration power and a high Coefficient of Performance (COP) under small current conditions for the analysis of the thermoelectric performance of the TERC.
Highlights
Water is the most plentiful resource of the earth
Thermoelectric Refrigeration Membrane Distillation et al, 2021), which has been indicated that the membrane distillation possessed excellent advantages, e.g., high separation efficiency, simple operation conditions, mild requirements on the interaction between membrane, and raw feed liquid (Smolders and Franken, 1989; Rezaei et al, 2018)
The operational stability of the thermoelectric refrigeration component was analyzed to provide a reference for studying operation conditions of coupling between the Thermoelectric Refrigeration Component (TERC) and the air gap Membrane Distillation (MD) process
Summary
Water is the most plentiful resource of the earth. only 3% of the water is fresh and just about 0.5% of freshwater is accessible to human needs in river water or groundwater (Shtull-Trauring et al, 2020; Nthunya et al, 2022). The combined membrane distillation with TER is an emerging strategy in the water distillation field Such as a selfcontained direct contact membrane distillation (EPSCD) system which is integrated TERC and combined multistage MD a single unit to manage the energy requirement of the desalination process (Makanjuola et al, 2021). Our group’s previous investigation of the MD process and thermoelectric refrigerator (Junhu et al, 2015; Da et al, 2019), defined the coupling characteristic parameters, coupling conditions, optimal coupling conditions, and established the coupling characteristic parameter equation They found that the feed concentration, flow state, and membrane structure remain stable, the membrane distillation flux is controlled by the temperature difference on both sides of the membrane. The operational stability of the thermoelectric refrigeration component was analyzed to provide a reference for studying operation conditions of coupling between the TERC and the air gap MD process
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