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008			251198s1984 th uzm rtt 00| a1eng d
035			_a.b10026502
099		9	_aAIT RSPR no. ET-84-12
100	0		_aPinit Tantirattanawat
245	1	2	_aA computer package to determine thermodynamic properties of steam & water
260			_aBangkok : _bAsian Institute of Technology, _c1984
300			_a68 p.
490	1		_aResearch studies project report ; _vno. ET-84-12
500			_aA research study (7 credits) submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development
502			_aResearch Studies Project Report (M. Eng.) - Asian Institute of Technology, 1984
520			_aThis report describes an autonomous computer package, which comprises of several subroutines linking up all the following thermodynamic properties with each other: temperature, pressure, specific volume, internal energy, specific enthalpy and specific entropy. Though different workers have proposed different sets of basic correlations, the approach by KEEAN et al (1969) was deemed most convenient and appropriate. They propose a fundamental equation for the Helmholtz free energy function (applicable for liquid and steam region) from which by derivatives, all thermodynamic properties can be obtained. This fundamental equation is expressed in terms of temperature and specific volume which therefore can be considered as basic properties. The equations for dynamic viscosity and thermal conductivity are taken from SCHMIDT (1983). The subroutines are divided into 2 classes ,i.e., class A and class B. Class B subroutines are used to calculate the values of the functions f and Q and their derivatives which are in the Helmholtz free energy equation. The users never call the subroutines in this class. Class A subroutines are used to calculate steam properties and can be further divided into 2 classes, class A. 1 and class A.2 according to the purpose of this study. Class A.1 subroutines is further divided into 3 groups Class A.1.1 subroutines are used when both the basic properties are known. class A.1.2 subroutines are needed when one basic property and one non-basic property is explicit while class A.1.3 subroutines are required when two non-basic properties are specified. Both classes A.1.2 and A.1.3 subroutines use Newton-Raphson Algorithm. Class A.2 subroutines determines thermal and thermodynamic properties ,i.e., specific heats at constant volume and constant pressure, work availability, thermal conductivity, dynamic viscosity, thermal diffusivity and the Prandtl number, as a function of the two basic properties, and properties at saturation condition ,i.e., saturation temperature and pressure, specific volume at saturated liquid and vapor. The given property for saturation condition must be saturated temperature of pressure.
650		0	_aWater _xThermal properties
650		0	_aSteam _xThermal properties
700	1		_aSaunier, G.Y., _eChairperson
700	1		_aReddy, T. A., _eExamination Committee
700	0		_aVilas Wuwongse, _eExamination Committee
710	2		_aCaltex Oil Company (Thailand), _eScholarship Donor
810	2		_aAsian Institute of Technology. _tResearch studies project report ; _vno. ET-84-12
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B20697
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