Part 3 Submission type: ONE Excel workbook with a new sheet for each question (if applicable). Calculations must be done in Excel with all relevant calculation cells linked together. Answers that do not feature linked cells (where necessary) will be docked marks. Use a text box for word answers. The first and second laws of thermodynamics must both be obeyed for a real process to happen. In this lab, we will conduct the mass, energy, and entropy analysis of a plate heat exchanger. A heat exchanger is a device that exchanges heat between a hot stream and a cold stream. The streams are physically separated by a "wall" (i.e., stainless steel plates in this case). The heat exchanger in the lab receives a hot stream from a heat pump while the cold stream comes from a cooling tower. Your lab is to examine at least five heat exchanger temperature and flow datasets and determine for each one: The amount of heat that transfers from the hot to the cold streams in kW The specific entropy change of the hot and cold streams separately in kJ/kgK The rate of entropy generation that occurs due to the heat transfer process in kW/K Comment on the following in your lab write-up: Explain whether the rate of entropy generation follows the second law. • Explain why the hot stream outlet temperature reaches a temperature below the cold stream outlet temperature. If the hot temperature is below the cold temperature, does that violate the second law? Explain why the specific entropy change of one stream be either positive or negative but the entropy generation is only ever zero or positive. The lab demonstrators will give guidance on best practice for the experiment. You must provide the data you have collected with your submission. You can enter the data directly in the Excel in the table format provided on the next page. Heat Exchange Data Trial Heat in (J) Heat out (J) Cold in (J) Cold out (J) Hot Flow Rate (L/min) 1 39.8 17.9 14.7 22.1 20.5 23 2 39.2 20.4 14.6 27.2 20.4 39.5 24.5 14.8 33.1 20.3 4 st 40.9 27.1 15.1 35.8 20.4 5 in 41 23.1 14.9. 31.6 20.4

Part 3 Submission type: ONE Excel workbook with a new sheet for each question (if applicable). Calculations must be done in Excel with all relevant calculation cells linked together. Answers that do not feature linked cells (where necessary) will be docked marks. Use a text box for word answers. The first and second laws of thermodynamics must both be obeyed for a real process to happen. In this lab, we will conduct the mass, energy, and entropy analysis of a plate heat exchanger. A heat exchanger is a device that exchanges heat between a hot stream and a cold stream. The streams are physically separated by a "wall" (i.e., stainless steel plates in this case). The heat exchanger in the lab receives a hot stream from a heat pump while the cold stream comes from a cooling tower. Your lab is to examine at least five heat exchanger temperature and flow datasets and determine for each one: The amount of heat that transfers from the hot to the cold streams in kW The specific entropy change of the hot and cold streams separately in kJ/kgK The rate of entropy generation that occurs due to the heat transfer process in kW/K Comment on the following in your lab write-up: Explain whether the rate of entropy generation follows the second law. • Explain why the hot stream outlet temperature reaches a temperature below the cold stream outlet temperature. If the hot temperature is below the cold temperature, does that violate the second law? Explain why the specific entropy change of one stream be either positive or negative but the entropy generation is only ever zero or positive. The lab demonstrators will give guidance on best practice for the experiment. You must provide the data you have collected with your submission. You can enter the data directly in the Excel in the table format provided on the next page. Heat Exchange Data Trial Heat in (J) Heat out (J) Cold in (J) Cold out (J) Hot Flow Rate (L/min) 1 39.8 17.9 14.7 22.1 20.5 23 2 39.2 20.4 14.6 27.2 20.4 39.5 24.5 14.8 33.1 20.3 4 st 40.9 27.1 15.1 35.8 20.4 5 in 41 23.1 14.9. 31.6 20.4