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 5-15x speed-up compared to the powi() of the Rust standard library，2-3x speed-up compared to the C implementation using the same fast algorithms.

• The comparison results of the computing-time are obtained using the criterion.rs.

The following input pairs are implemented:

(p,t) (p,h) (p,s) (p,v) 

(t,h) (t,s) (t,v) 

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

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

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
pv(p:f64,v:f64,o_id:i32)->f64

th(t:f64,h:f64,o_id:i32)->f64
ts(t:f64,s:f64,o_id:i32)->f64
tv(t:f64,v:f64,o_id:i32)->f64

px(p:f64,x:f64,o_id:i32)->f64
tx(p:f64,x:f64,o_id:i32)->f64
hx(h:f64,x:f64,o_id:i32)->f64
sx(s:f64,x:f64,o_id:i32)->f64

hs(h:f64,s:f64,o_id:i32)->f64

Example

use if97::*;
fn main() {
    
    let p:f64 = 3.0;
    let t:f64= 300.0-273.15;
   
    let h=pt(p,t,OH);
    let s=pt(p,t,OS);
    let v=pt(p,t,OV);
    println!("p={p:.6} t={t:.6} h={t:.6} s={s:.6} v={v:.6}");   
}

Properties