: (specific heat):1kg1(1K) (constant pressure specific heat),Cp(constant volume specific heat) Cv(constant volume specific heat),Cv SIkJ/kgkJ/kgKBTU/lbm BTU/lbm Cp=Cv:0 Cp = 4 186 kJ/kgK:0 Cp = 4.186 kJ/kg K Cp>Cv:0 Cp = 1.005 kJ/kgK

( ) ( sensible heat )

=

(latent heat) ( ) ( )

( ) ( ) ( ) ( )

(J kJ) (J,kJ) : 1J=Ws 1 kJ= 1/4.186 kcal= 238.8 cal1 kcal= 4.1868 kJ 1 kW = 3600 kJ/h = 860 kcal (K):(0)(0 ) T(K) = 273.15 + 273 K273 (Mpa g): (Mpa g) =(Mpa a) - 0 1013 (Mpa) (Mpa g) =(Mpa a) 0.1013 (Mpa)

( ) (Enthalpy,kJ/kg):h

0000

1h_(Entropy,kJ/kgK): SS

1J_(SH,deg):

SHSH

SH

( ) (SC,deg):

:

()()

:

1.2 2. 3.4.()5.6.7 7.8.9 9. 10.:

1.

2.

3.

: :

Q W(Q=U*A*Tm)

QWUW/m2KAm2

?

TmC

Ae Tm TeQe()

Ae Tm TeQeAe Tm Te Qe ()

() ?()Ac Tm Tc

())

::

::

PsychrometricPsychrometric

: (dry bulb temperature)(DB) (wet bulb temperature):1000~2000fpm

(WB)(WB) (dew point temperature)(DP)P P (Td ) ()Pv=Ps(Tdp) () (absolute humidity)Pv=mv/V(kg H2Ov/m3) Pv mv/V( kg H2Ov/m3) (humidity ratio):W

(mv)(ma)W=mv/ma

PsychrometricPsychrometric

: (relative humidity)(pv)

(pspg)()

DB DP WBDB,DP,WB

=100%

:

1.:(Molier)

2.:(Psychrometrics)(Psychrometrics)

3 3.

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