IF97

IF97 is the high-speed package of IAPWS-IF97 in Rust. It is suitable for computation-intensive calculations，such as heat cycle calculations, simulations of non-stationary processes, real-time process monitoring and optimizations.

Through the high-speed package, the results of the IAPWS-IF97 are accurately produced at about 5~10x speed-up compared to the powi() of the Rust standard library，5x speed-up compared to the shared library in C using the same fast algorithms.

The following input pairs are implemented:

(p,t) (p,h) (p,s) (p,x) 

(t,x) 

(h,s)  

Usage

Install the crate

cargo add if97

The type of functions are provided in the if97 package:

fn(f64,f64,i32) -> f64;

• first,second input parameters: the input propertry pairs(f64)
• third input parameter: o_id - the property ID of the calculated property(i32)
• the return: the calculated property value(f64)

pt(p:f64,t:f64,o_id::i32)->f64;
ph(p:f64,h:f64,o_id::i32)->f64;
ps(p:f64,s:f64,o_id::i32)->f64;
hs(h:f64,s:f64,o_id::i32)->f64;
px(p:f64,x:f64,o_id::i32)->f64;
tx(p:f64,x:f64,o_id::i32)->f64;

Examples

use if97::pt;
fn main() {
    
    let p:f64 = 3.0;
    let t:f64= 300.0-273.15;
   
    let h=pt(p,t,if97::OH);
    let s=pt(p,t,if97::OS);
    let v=pt(p,t,if97::OV);
    
    println!("p={} t={} h={} s={} v={}",p,t,h,s,v);    
}

Properties in if97