Main Page | Namespace List | Class Hierarchy | Alphabetical List | Class List | File List | Namespace Members | Class Members | File Members | Examples

consts.h File Reference

Declaration of constants used in the HVAC toolkit. More...

This graph shows which files directly or indirectly include this file:

Included by dependency graph

Go to the source code of this file.

Mathematical constants

const double SMALL = 1.0e-23
 considered a very small number

const double LARGE = 1.0e+23
 considered a very large number

const double PI = 3.14159265358979323846
 ratio of circle perimeter over its diameter: $\pi$


Constants used to identify flow arrangement in heat exchangers

const unsigned COUNTER_FLOW = 1
 counter flow

const unsigned PARALLEL_FLOW = 2
 parallel flow

const unsigned CROSS_FLOW_BOTH_UNMIXED = 3
 cross flow, both unmixed

const unsigned CROSS_FLOW_BOTH_MIXED = 4
 cross flow, both mixed

const unsigned CROSS_FLOW_1_UNMIXED = 5
 cross flow, first stream unmixed

const unsigned CROSS_FLOW_2_UNMIXED = 6
 cross flow, second stream unmixed


Physical constants

const double ABS_ZERO = -273.16
 absolute zero temperature in [deg_C]

const double KELV_ZERO = 273.16
 0 [deg_C] in [K]

const double BOLTZ = 5.67E-8
 Stefan-Boltzmann constant [W/(m^2*K^4)].

const double CP_AIR = 1006.0
 specific heat capacity of dry air [J/(kg*K)]

const double MW_AIR = 28.9645
 molar weight of dry air [g/mol]

const double CP_VAP = 1805.0
 specific heat capacity of water vapor [J/(kg*K)]

const double CP_WAT = 4186.0
 specific heat capacity of liquid water [J/(kg*K)]

const double MW_WATER = 18.01528
 molar weight of liquid water [g/mol]

const double MW_RATIO = 0.62197
 ratio of molar weights of liquid water over dry air [-]

const double HF_VAP = 2.501E6
 latent heat of vaporization of water [J/kg]

const double LAMBDA_AIR = 0.0243
 thermal conductivity of dry air [W/(m*K)]

const double LAMBDA_WAT = 0.554
 thermal conductivity of liquid water [W/(m*K)]

const double PRANDTL_AIR = 0.71
 Prandtl number for dry air [-].

const double RHO_AIR = 1.2
 density of air [kg/m^3]

const double RHO_WAT = 998.0
 density of water [kg/m^3]

const double VISC_WAT = 1.0E-3
 dynamic viscosity for liquid water [kg/(m*s)]

const double R_AIR = 287.053
 specific gas constant for ideal air [J/(kg*K)]

const double R_0 = 8314.34
 universal gas constant [kJ/(mol*K)]

const double P_ATM = 101325.0
 atmospheric pressure in [kg/(m*s^2)] or [Pa]

Detailed Description

Declaration of constants used in the HVAC toolkit.

Attention:
PORTIONS COPYRIGHT (C) 2003 AYRES SOWELL ASSOCIATES, INC.
PORTIONS COPYRIGHT (C) 2003 THE REGENTS OF THE UNIVERSITY OF CALIFORNIA . PENDING APPROVAL BY THE US DEPARTMENT OF ENERGY. ALL RIGHTS RESERVED.

Variable Documentation

const double SMALL = 1.0e-23
 

considered a very small number

const double LARGE = 1.0e+23
 

considered a very large number

const double PI = 3.14159265358979323846
 

ratio of circle perimeter over its diameter: $\pi$

const unsigned COUNTER_FLOW = 1
 

counter flow

const unsigned PARALLEL_FLOW = 2
 

parallel flow

const unsigned CROSS_FLOW_BOTH_UNMIXED = 3
 

cross flow, both unmixed

const unsigned CROSS_FLOW_BOTH_MIXED = 4
 

cross flow, both mixed

const unsigned CROSS_FLOW_1_UNMIXED = 5
 

cross flow, first stream unmixed

const unsigned CROSS_FLOW_2_UNMIXED = 6
 

cross flow, second stream unmixed

const double ABS_ZERO = -273.16
 

absolute zero temperature in [deg_C]

const double KELV_ZERO = 273.16
 

0 [deg_C] in [K]

const double BOLTZ = 5.67E-8
 

Stefan-Boltzmann constant [W/(m^2*K^4)].

const double CP_AIR = 1006.0
 

specific heat capacity of dry air [J/(kg*K)]

const double MW_AIR = 28.9645
 

molar weight of dry air [g/mol]

const double CP_VAP = 1805.0
 

specific heat capacity of water vapor [J/(kg*K)]

const double CP_WAT = 4186.0
 

specific heat capacity of liquid water [J/(kg*K)]

const double MW_WATER = 18.01528
 

molar weight of liquid water [g/mol]

const double MW_RATIO = 0.62197
 

ratio of molar weights of liquid water over dry air [-]

const double HF_VAP = 2.501E6
 

latent heat of vaporization of water [J/kg]

const double LAMBDA_AIR = 0.0243
 

thermal conductivity of dry air [W/(m*K)]

const double LAMBDA_WAT = 0.554
 

thermal conductivity of liquid water [W/(m*K)]

const double PRANDTL_AIR = 0.71
 

Prandtl number for dry air [-].

const double RHO_AIR = 1.2
 

density of air [kg/m^3]

const double RHO_WAT = 998.0
 

density of water [kg/m^3]

const double VISC_WAT = 1.0E-3
 

dynamic viscosity for liquid water [kg/(m*s)]

const double R_AIR = 287.053
 

specific gas constant for ideal air [J/(kg*K)]

const double R_0 = 8314.34
 

universal gas constant [kJ/(mol*K)]

const double P_ATM = 101325.0
 

atmospheric pressure in [kg/(m*s^2)] or [Pa]


Generated on 5 Nov 2003 for VisualSPARK 2.01