Technical Aspects of Semi-Welded Plate Heat Exchangers when
Technical Aspects of Semi-Welded Plate Heat Exchangers when used as Evaporators and Condensers (1996)-A brief overview of semi-welded plate heat exchangers (PHEs) is presented, including their design, operation, and construction. Additionally, this paper addresses some common technical issues when considering semi-welded PHEs for industrial refrigeration applications. Unless industrial refrigeration systems are properly designed, maldistribution of liquid refrigerant can occur in plate evaporators. The cause of refrigerant maldistribution and steps that can be taken to minimize the occurrence will be addressed. This paper will discuss issues pertaining to heat transfer coefficients, approach temperatures, pressure drops and liquid refrigerant feeds. Additionally, concerns regarding freezing of a plate evaporator and the resulting consequences will be addressed.
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