HEAT & MASS TRANSFER LAB - PARALLEL AND COUNTER CURRENT FLOW IN A DOUBLE PIPE HEAT EXCHANGER

 

PARALLEL AND COUNTER CURRENT FLOW IN A DOUBLE PIPE HEAT EXCHANGER

 OBJECTIVES

➤ To determine the LMTD and overall heat transfer coefficient of the heat exchanger during parallel          and counter current flow configuration.

➤ To estimate the effectiveness of the heat exchanger under parallel and counter current flow                     conditions.

DATA SHEET

            t₁₁        COLD WATER INLET 

                t₁₂        COLD WATER OUTLET 

             t₂₁         HOT WATER INLET 

                t₂₂          HOT WATER OUTLET

RESULTS & DISCUSSIONS                            

 ➤           Compute the LMTD (log mean temperature difference), rate of heat transferred by hot and                       cold water (Q) and overall heat transfer coefficients (U) for both parallel and counter current                   flow configurations.

 ➤          Compute the effectiveness factor ’h’ for parallel and counter current flow configurations.

 ➤       Plot the temperature profiles for cold as well as hot water for parallel and counter current flow configurations.

 ➤       Compare the amount of heat transferred in both the flow configurations and provide reasons for the difference.