ME300Lecture17 - Lecture 17: Psychrometric Applications...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
17.1 Lecture 17: Psychrometric Applications Cooling with Dehumidification and Reheating » Recall that the outlet state of the dehumidification coil is saturated air ( = 1.0, ideal case) or close to saturation ( > 0.95, real case) » Higher relative humidity results in uncomfortable conditions, even if humidity ratio is lower. » Heat input at constant humidity ratio decreases relative humidity
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
17.2 Example 17.1 Given: Find: » Mass flow rate of condensed water » Cooling heat transfer rate » Heating heat transfer rate V 1 =2000 . 1 T w = 60 o F 3 T 3 =75 o F 3 =50% p 3 =14.7 psia T 1 =86 o F 1 =60% p 1 =14.7 psia Air ft 3 min 2 + - . Q cool . Q heat
Background image of page 2
17.3 Continue Example 17.1 T = 1.0 1 3 = 0.5 = 0.6 h 1 h 3 h 2 T 1 T 2 T 3 1 2 3 Assumptions: » KE = PE = 0 » SSSF » Constant pressure
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
17.4 Continue Example 17.1 Solution: » Using psychrometric chart:
Background image of page 4
17.5 Continue Example 17.1
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
17.6 Continue Example 17.1
Background image of page 6
17.7 Continue Psychrometric Applications Evaporative Cooling: » Used in desert climates, where it is hot and dry (low relative humidity)
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 04/23/2011.

Page1 / 18

ME300Lecture17 - Lecture 17: Psychrometric Applications...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online