Mixture search, Simple heat-pump (plotting)

Simple calculation of heat pump states for multinerary mixtures (using Refprop) mainly for visualization of temperature and enthalpy levels for different pressure levels and slight superheatig after evaporation.

Created on Tue Nov 22 14:55:50 2022

@author: atakan

mixture_search.f_name(fluid_s, comp, p0, p_ratio)

mixture_search.find_comp(x, x0, p=110000.0, T=289.0)

find the ternary composition for given compressor inlet T & p function for scipy.root

Parameters

• x (float (0<x<1)) – mole fraction to vary, the second one in the list.

• x0 (float (0<x<1)) – fixed mole fraction , the first one in the list.

• p (float, optional) – inlet pressure in Pa. The default is 1.1e5.

• T (float, optional) – inlet pressure in K. The default is 289..

Returns

difference between wanted T and T of the mixture at p.

Return type

float

mixture_search.hp_calc(pev, pcond, comp=[1.0], dT_cin=10, fluid_s='Propane * Hexane * Butane', eta_s=0.65)

simple heat pump calculation (also for plotting the state changes)

Parameters

• pev (float) – evaporator pressure in Pa.

• pcond (float) – condenser pressure in Pa.

• comp (list of floats, optional) – molar composition, must sum to 1. The default is [1.0].

• dT_cin (float, optional) – superheating at compresor entrance. The default is 10.

• fluid_s (depends on property module(REFPROP/CoolProp), optional) – working fluid compounds (list). The default is fluid_s.

• eta_s (float, optional) – isentropic efficiency compressor. The default is 0.65.

Returns

states along the cyle, for each T,p,h,v,s,q.

Return type

numpy array (npo+5, 6)