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The recycle ratio (ft³ recirculated/ft³ exhausted) is 2:1. Calculate the condensation rate and the overall cooling requirement in tons if conditioned air is delivered at the same rate, temperature, and relative humidity as in the first part. What percentage of the cooling load on the air conditioner is saved by recirculating the air? Condensation rate: i Ibm/min Cooling load: i tons Percentage savings: i

The recycle ratio (ft³ recirculated/ft³ exhausted) is 2:1. Calculate the condensation rate and the overall cooling requirement in tons if conditioned air is delivered at the same rate, temperature, and relative humidity as in the first part. What percentage of the cooling load on the air conditioner is saved by recirculating the air? Condensation rate: i Ibm/min Cooling load: i tons Percentage savings: i

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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On an uncomfortable summer day, the air is at 87 °F and 80 % relative humidity. A laboratory air conditioner is to deliver 1.0 x 103 ft3/min of air at 55 °F in order to maintain the interior air at an average temperature of 75°F and a relative humidity of 40%.

If the vent switch is set to the "closed" position (as it normally would be), inside air would be recirculated through the air conditioner as shown in the following diagram. ### Diagram Explanation: The diagram represents the air circulation process within a closed system air conditioner, specifically illustrating the flow of air through the system. 1. **Air Conditioner Components**: - **Reheater**: A component within the air conditioner that reheats the air before it's delivered. - **Cooler**: A component that cools the air, and during this process, condensed water is produced. 2. **Airflow Process**: - **Recirculated Room Air**: The process starts with recirculated room air at a temperature of 75°F and a relative humidity of 40%. - **Delivering Air**: After passing through the air conditioner, the air is delivered to the lab at a specified temperature (C °F). - **Exhaust Air**: Some air is exhausted out of the system at 75°F and 40% relative humidity. 3. **External Air Interaction**: - **Outside Air**: There is an intake of outside air with unspecified temperature (A °F) and relative humidity (B %). - **Ventilation and Heat Exchange**: The interaction between indoor and outside air within the air conditioner contributes to the overall cooling and reheating process. The diagram helps visualize how air is conditioned and circulated within a controlled environment, maintaining specific temperature and humidity levels in the lab space.
Transcribed Image Text:If the vent switch is set to the "closed" position (as it normally would be), inside air would be recirculated through the air conditioner as shown in the following diagram. ### Diagram Explanation: The diagram represents the air circulation process within a closed system air conditioner, specifically illustrating the flow of air through the system. 1. **Air Conditioner Components**: - **Reheater**: A component within the air conditioner that reheats the air before it's delivered. - **Cooler**: A component that cools the air, and during this process, condensed water is produced. 2. **Airflow Process**: - **Recirculated Room Air**: The process starts with recirculated room air at a temperature of 75°F and a relative humidity of 40%. - **Delivering Air**: After passing through the air conditioner, the air is delivered to the lab at a specified temperature (C °F). - **Exhaust Air**: Some air is exhausted out of the system at 75°F and 40% relative humidity. 3. **External Air Interaction**: - **Outside Air**: There is an intake of outside air with unspecified temperature (A °F) and relative humidity (B %). - **Ventilation and Heat Exchange**: The interaction between indoor and outside air within the air conditioner contributes to the overall cooling and reheating process. The diagram helps visualize how air is conditioned and circulated within a controlled environment, maintaining specific temperature and humidity levels in the lab space.
Assume A = 87 °F, B = 80%, C = 55 °F. The recycle ratio (ft³ recirculated/ft³ exhausted) is 2:1. Calculate the condensation rate and the overall cooling requirement in tons if conditioned air is delivered at the same rate, temperature, and relative humidity as in the first part. What percentage of the cooling load on the air conditioner is saved by recirculating the air? - **Condensation rate:** [Input field] lbₘ/min - **Cooling load:** [Input field] tons - **Percentage savings:** [Input field] % Note: The diagram is an input form for calculating and displaying the condensation rate, cooling load, and percentage savings.
Transcribed Image Text:Assume A = 87 °F, B = 80%, C = 55 °F. The recycle ratio (ft³ recirculated/ft³ exhausted) is 2:1. Calculate the condensation rate and the overall cooling requirement in tons if conditioned air is delivered at the same rate, temperature, and relative humidity as in the first part. What percentage of the cooling load on the air conditioner is saved by recirculating the air? - **Condensation rate:** [Input field] lbₘ/min - **Cooling load:** [Input field] tons - **Percentage savings:** [Input field] % Note: The diagram is an input form for calculating and displaying the condensation rate, cooling load, and percentage savings.
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