coolprop-node/test/R407F.test.js

A Node.js wrapper for CoolProp providing an easy-to-use interface for thermodynamic calculations and refrigerant properties. Unlike all the other CoolProp npm packages I've seen, this one should actually work. Please report any issues.

const coolprop = require('../src/index.js');

describe('R407F Real Values', () => {
    it('should calculate superheat correctly at -40°C saturation', async () => {
        const result = await coolprop.calculateSuperheat({
            temperature: -35,  // 5K above saturation temp of -40°C
            pressure: -0.24,    // saturation pressure at -40°C (from vapor column)
            refrigerant: 'R407F',
            tempUnit: 'C',
            pressureUnit: 'psig'
        });
        expect(result.type).toBe('success');
        expect(Math.abs(result.superheat - 5)).toBeLessThan(0.2); // Should be ~5K superheat
    });

    it('should calculate superheat correctly at -20°C saturation', async () => {
        const result = await coolprop.calculateSuperheat({
            temperature: -15,  // 5K above saturation temp of -20°C
            pressure: 21.00,    // saturation pressure at -20°C (from vapor column)
            refrigerant: 'R407F',
            tempUnit: 'C',
            pressureUnit: 'psig'
        });
        expect(result.type).toBe('success');
        expect(Math.abs(result.superheat - 5)).toBeLessThan(0.2); // Should be ~5K superheat
    });

    it('should calculate subcooling correctly at 30°C saturation', async () => {
        const result = await coolprop.calculateSubcooling({
            temperature: 25,    // 5K below saturation temp of 30°C
            pressure: 202.16,    // saturation pressure at 30°C (from liquid column)
            refrigerant: 'R407F',
            tempUnit: 'C',
            pressureUnit: 'psig'
        });

        expect(result.type).toBe('success');
        expect(Math.abs(result.subcooling - 5)).toBeLessThan(0.2); // Should be ~5K subcooling
    });

    it('should calculate subcooling correctly at 40°C saturation', async () => {
        const result = await coolprop.calculateSubcooling({
            temperature: 35,    // 5K below saturation temp of 40°C
            pressure: 263.91,    // saturation pressure at 40°C (from liquid column)
            refrigerant: 'R407F',
            tempUnit: 'C',
            pressureUnit: 'psig'
        });
        
        expect(result.type).toBe('success');
        expect(Math.abs(result.subcooling - 5)).toBeLessThan(0.2); // Should be ~5K subcooling
    });

    it('should calculate zero superheat at saturation point', async () => {
        const result = await coolprop.calculateSuperheat({
            temperature: 0,     // Exact saturation temperature
            pressure: 61.03,    // Matching saturation pressure from vapor column
            refrigerant: 'R407F',
            tempUnit: 'C',
            pressureUnit: 'psig'
        });
        console.log(result);
        expect(result.type).toBe('success');
        expect(Math.abs(result.superheat)).toBeLessThan(0.2); // Should be ~0K superheat
    });

    it('should calculate zero subcooling at saturation point', async () => {
        const result = await coolprop.calculateSubcooling({
            temperature: 20,    // Exact saturation temperature
            pressure: 151.19,    // Matching saturation pressure from liquid column
            refrigerant: 'R407F',
            tempUnit: 'C',
            pressureUnit: 'psig'
        });
        
        expect(result.type).toBe('success');
        expect(Math.abs(result.subcooling)).toBeLessThan(0.2); // Should be ~0K subcooling
    });

    it('It should also work with R407f (lowercase f)', async () => {
        const result = await coolprop.calculateSubcooling({
            temperature: 20,    // Exact saturation temperature
            pressure: 151.19,    // Matching saturation pressure from liquid column
            refrigerant: 'R407f',
            tempUnit: 'C',
            pressureUnit: 'psig'
        });
        
        expect(result.type).toBe('success');
        expect(Math.abs(result.subcooling)).toBeLessThan(0.2); // Should be ~0K subcooling
    });
});