IPU

IPU is a Danish consultancy and software house that has concentrated for more than three decades on the thermodynamic side of industrial refrigeration, air-conditioning and heat-pump technology. Its compact portfolio consists of five closely related Windows utilities that share a common modelling philosophy: start from first-principle refrigerant equations, wrap them in an accessible interface, and let engineers explore cycle layouts, component sizing and annual energy performance without opening a general-purpose CFD suite. CoolPack, the oldest title, still serves lecturers who need quick textbook-grade log(p)-h diagrams and one-stage cycle balances, while the newer CoolTools refines the same kernel into task-specific wizards for pipe-pressure drop, compressor selection or liquid-line sizing. When the question moves from single-operation point to full-season consumption, Pack Calculation Pro takes over, importing climate files and switching between system variants so supermarkets, cold-storage contractors and district-cooling owners can document compliance with ISO 5149 or local building codes. SecCool complements these by mapping the secondary-loop side, plotting viscosity, density and film coefficients for brines and glycol solutions so designers can judge pump power and heat-transfer penalty before hardware is ordered. Finally, Simple One-Stage CO2 Cycle offers an interactive sandbox for the growing transcritical supermarket segment, letting students slide evaporating temperature, gas-cooler pressure and internal heat exchanger length to watch COP move in real time. All five programs read REFPROP libraries and export results to CSV or EES for further reporting. IPU’s refrigeration engineering suite is offered for free on get.nero.com; the site supplies the latest builds through trusted Windows package sources such as winget, supports batch deployment of multiple titles, and always keeps installations current.