V sup: Supply airflow rate (m³/s) Vret : Exhaust airflow rate (m³/s) To Air-to-air heat recovery system Ve exf: Exfiltration (m³/s) Tret Exhaust air temperature (°C) Tsup Supply air temperature (°C) T : Zone temperature (°C) To : Outdoor air temperature (°C) Exhaust air fan Vret Θ T sup Supply air fan Heating coil Tret Zone T: Vexf

V sup: Supply airflow rate (m³/s) Vret : Exhaust airflow rate (m³/s) To Air-to-air heat recovery system Ve exf: Exfiltration (m³/s) Tret Exhaust air temperature (°C) Tsup Supply air temperature (°C) T : Zone temperature (°C) To : Outdoor air temperature (°C) Exhaust air fan Vret Θ T sup Supply air fan Heating coil Tret Zone T: Vexf

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.19P

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A summer air-conditioning shown below is required to maintain a certain room at specified conditions. The layout of the system is indicated on the next page and the specifications are listed below.System specifications:Required room temperature: 23⁰C, 50% Relative humidityAtmospheric pressure: 101 kPaOutside air conditions: 30⁰C, 80% Relative humidity Sensible heat gain: 5 kWLatent heat gain: 4 kWTemperature rise across fan: 1.5⁰CTemperature of air leaving cooler: 12⁰CTemperature of air entering room: 18⁰CApparatus dew point of cooler: 7⁰C
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