v5.5.3 (2024-06-12)
    - Reworked loading/saving of project and profile files, fixing a reported bug and preventing many other bugs.
	  - Failed save can from now on be detected by files with .part extension.

(v5.5.2 (2024-06-10) - retracted)

v5.5.1 (2024-06-03)
    - State points and log(p)-h diagram available for more cycles.
	- Updated documentation for new functionality in Rating Points.
    - Quality improvements to functionality introduced in v5.5
    - Improved experience when changing license types.
    - Improvements for water consumption / rainwater tank calculation tool, now respects unit system.

v5.5.0 (2024-03-18)
    - Heat pumps: One-stage transcritical heat pump model, with water-cooled gas cooler
    - Refrigeration: Two-stage transcritical with open intercooler
    - Condenser model: Improved model for hybrid cooler / adiabatic gas cooler
    - Transcritical operation of gas cooler fans can now be estimated at part load. Transition zone of gas cooler control now also slides fan control approach.
    - Full update of Bitzer product catalogue
    - Full update of Bock product catalogue
    - Dorin: Larger CD600 models, and LSPM motor models
    - Frascold: Full update of hydrocarbon compressor data. SRC, CX, FVR series.
    - Pre-release: Displaying state points and log(p)-h diagram for most single-refrigerant systems
    - Pre-release: Water-cooled evaporator, allowing for custom source temperature profile.
    - Pre-release: Limit on potential/available cooling capacity for heat pumps

v5.3.10 (2023-11-03)
    - Update TeeChart and FastReports to newer versions, in attempt to fix issues reported by some users when generating reports.
    - Fix: When condenser fan set to run with compressors, and compressor pack cycles on-off, in some cases condenser does not turn on-off.

v5.3.9 (2023-10-03)
    - Fix: Improvement of envelope display for compressors with Te/Pgc polynomials for subcritical operation.
    - Add preference value for minimum capacity ratio before parallel compressors are enabled.
    - Fix: Allow using Dorin's CD compressors for subcritical operation with other subcritical-only compressors with Te/Tc polynomials
    - Fix: 'Adjust ambient temperature by adding' field not saved to project file

v5.3.7 (2023-02-06)
    - Fix loading projects with generic (auto-generated, hidden) compressors - was not respecting refrigerant choice
    - Further improvement to solver of Two one-stage, common condenser

v5.3.6 (2023-02-03)
    - Fix stability of Two one stage, common condenser solving
    - Fix calculation stability for mixture-based refrigerants such as R407A above a component's critical pressure
    - Error in unit conversion in Two one-stage condensing temperature solver, when using something else than Celcius as temperature input

v5.3.4 (2023-01-19)
    - Fix issue with new splash screen on some systems
    - Change how divide by zero etc. are handled
    - Fix missing translation of some buttons and texts, especially in Update Version dialog
    - Revert forcing LT subcooling to 0K for cascade systems. Will be revisited for v5.4
    - Update Spanish manual

v5.3.0 (2023-01-09)
    - Rating points calculation UI added
    - More ejector cycles added: Two-stage transcritical ejector with/without parallel compression. One-stage transcritical ejector with parallel compression
    - Added auto-sized compressors with fixed efficiency for all cycles, allowing to do rough initial calculation before choosing compressors
    - Removed 0% capacity inputs for ground-source evaporator - no passive heat transfer possible in that case
    - If useful superheat above DT with ambient, prevent calculation. Small effect on compressor energy consumption.
    - Fix: Heat pump evaporator fans/pumps not cycling on-off simultaneous with on-off compressor pack, but was simulated as always-on in that case. Now simulating simultaneously on-off, as with refrigeration system condenser fans.
    - Show thermal energy delivered in Summary table.
    - Fix issue introduced in v5.0: LT liquid temperature in closed intercooler and liquid injection cycles not respecting MT DTsc
    - Increased solving accuracy of liquid injection and two-one-stage common condenser cycles as function of Tc
    - Known Evaporator Size for refrigeration is now auto-dimensioned with air cooler nominal DT.
    - Fix month results chart for "two one-stage" system: LT condenser power was not included in chart.
    - Restricted Free Cooling so it only can cover MT cooling in two-stage refrigation systems.
    - Improvements to equal cooling load behaviour when comparing one-stage with two-stage refrigeration systems
    - 1856 new/updated Dorin compressor polynomials from CD, CDS, H, HEX series
    - Introduce new loading / splash screen

v5.2.3 (2022-04-25)
    - Fix two bugs with calculating parallel pack power consumption. Affects results. #214, #216.
    - Fix: Crash when using free cooling on 64-bit version
    - Show warning instead of crash report when loading project files with systems not yet included in current software version.

v5.2.2 (2022-03-29)
    - Fix WCond in transcritical calculation when heat recovery takes 100% of heat. Affects results. #208

v5.2 (2022-03-11)
    - Add 'One-stage transcritical, ejector' model
    - Add 'Two-stage Cascade heat pump' model
    - Frascold: Import 511 new CX and SRC compressors for R134a, R290, R448A, R449A, R513A, R1234ze(E)
    - Bitzer: Import 837 new 60 Hz compressors, 365 new 50 Hz compressors, and update 472 existing 50 Hz compressors. CSH/CSW/HHK/HS/OHK/OS families. 
    - Improve display of Suction/Discharge side on smaller screens, by placing scroll bars more optimally. #180
    - Fix: CO(S)P calculation for heat pumps in plots and exports now based on condensing capacity - these were based on evaporator capacity until now. Now COSP values align properly with Average COP in Summary. #193

v5.1.1 (2021-09-23)
    - Fix: R1234ze(E) compressors not shown, due to spelling mismatch between compressor data and refrigerant data
    - R507 now shown with its correct name R507A
    - Fix: For two-stage transcritical, TCondAmb shows wrong value when no mechanical cooling is needed

v5.1.0 (2021-08-30)
    - Improve stability of cooling tower condenser model, so Tc is increased to a useful level if capacity too low #170
    - Fix units of cooling tower condenser outputs 'mWater' and 'VAir'. Now plotted/exported data is respecting nomenclature of [kg/h] and [m3/h] respectively #170
    - Fixed crash on 64-bit in cooling tower simulations, related to 100% relative humidity #170
    - Fix: Qe_required_mech for two-stage transcritical system omitting LT contribution, leading to poor warning messages #169
    - Now 'Cooling capacity' warnings show if they are generated by LT or MT pack. #169

v5.0.3 (2021-06-15)
    - Fix convergence of variable-speed parallel compressors at low capacities

v5.0.2 (2021-06-03)
    - Fixed simulation of variable-speed parallel compressors
    - Reduced peak memory usage during simulations, by optimizing the processing order of calculation results (works best if first system is reference system)
    - Decrease memory usage of report generator, by enabling file system caching of report, to try to avoid Out of Memory issues reported by some users
    - Update several translations since new version release

v5.0.0 (2021-04-15)
  - High impact:
    - New refrigerants: R32, R448A, R449A, R450A, R513A, R1234yf, R1234ze(E)
    - Registration is no longer optional for free usage
        - Demo version introduced - registration-free, only allows R22 systems
        - Educational version introduced - requires application via ipu.freshdesk.com

  - Other:
    - Prepared refrigerant: R1233zd(E), but no compressor data available yet
    - Added R32 compressors from Bitzer Orbit/+/FIT series (note: Economizer cycles not supported yet)
    - Parallel compression can now operate simultaneous with flash gas bypass. See user manual 4.2
    - Corrected envelopes for Bock HGX CO2 transcritical - evaporation temperature was in wrong unit
    - Fix rendering of plots in Report function - font sizes were wrong
    - Fix: Unit conversion not applied in some input/output fields

v4.6.3 (2021-03-26)
    - Include feature to check for available updates. Feedback appreciated

v4.6.2 (2020-10-28)
    - Fix capacity of transcritical and Ecoline Varispeed compressors, which accidentally got overwritten in v4.6.1

v4.6.1 (2020-06-17)
    - Add a few Bitzer screw compressors which did not get imported properly in v4.3.4
    - Show scroll bars if application window is too small to display all content
    - Fix issue #126: When heat recovery forces system to transcritical operation, fan power consumption goes to 0% instead of 100%
    - Fix issue #133: When heat recovery active in transcritical system, minimum subcritical condensing temperature ignored
    - Fix issue #138: Transcritical control behaving differently in 64-bit version of Pack Calculation Pro, leading to different simulation results
    - Fix issue #139: For "two-one-stage, common condenser" system, fan and pump power consumption in 'Summary' and 'Table' tables not matching with plotted data or Excel export 
    - Fix issue #140: Transition zone between subcritical and transcritical behaving wrong, leading to jump in Tgo when switching from subcritical to transition
    - Added Catalan (100%), Greek (80%), Japanese (38%), Swedish (50%) translations
    - Improvements to various existing translations
    - Update translation toolchain to integrate with Weblate

v4.4.6 (2019-11-08)
    - Fix IWEC2 weather data parsing - was reading data 8 hours wrong
    - Fix envelopes for Bock NH3 compressors in F-series
    - Import HGX subcritical Bock compressors
    - Update Dutch translations

v4.4.4 (2019-05-03)
    - Add IWEC2 weather data files for commercial users
    - Include 64-bit version of the software
    - Fix crash when using custom condenser with DT and Qc both set to zero
    - Fix issue #101: Crash with Economy calculations when interest rate is equal to inflation rate
    - Fix issue #102: Flooded evaporator settings not saved to file
    - Added Spanish translation of manual, made by AEFYT

v4.3.4 (2019-01-10)
    - Add Spanish, Portuguese and Brazilian portuguese translations
    - Added new Bitzer compressors (i.a. Ecoline, Ecoline varispeed, ME series, 2- and 6- cylinder Octagon transcritical CO2, Ecoline+ series)
    - Added new Bock compressors (EX-HG, HG, HA, HGX, F, FK)
    - Added Frascold compressors (TK, SK2, SK3)
    - Updated envelopes for existing Bitzer compressors
    - Added weather data for Mauritius
    - Profile Editor: Made possible to directly edit profile values in the table
    - Improvements to tab order of forms
    - Ability to open project files directly when clicking on them
    - Fixed bug: If parallel compressor pack has only one compressor which is fixed-speed, then too high parallel compressor pack capacity is never reported (shown as 100%)
    - Fix crash in report generation, when user logo not available
    - Fix crash when using water-cooled systems
    - Update logo and website links

v4.2.0 (2015-09-12)
    - New report generator
    - Updated/added several Bock compressors
    - Updated/added a few Copeland compressors
    - Fixed bug in heat recovery for transcritical systems (limits used are now based on ambient dry-bulb, not wet-bulb)
    - Fixed bug in transcritical systems using hybrid cooler
    - Fixed pump energy consumption for hybrid cooler
    - Fixed bug that occurred if heat recovery in transcritical systems meant subcooled liquid after high pressure valve

v4.1.1 (2015-02-26)
    - Bug-fix release, fixing an error occurring when calculating systems using R407F as refrigerant.

v4.1.0 (2015-02-06)
    - Parallel compressor systems for both one-stage and two-stage transcritical systems (only available for users with a commercial license)
    - R407F compressors included (only available for users with a commercial license)
    - New Copeland R744 scrolls added
    - Several new Bitzer compressors added
    - Documentation (help file) updated, explaining settings for parallel compressor systems
    - Fixed a couple of minor bugs related to calculations and temperature profiles

v4.0.0 (2014-02-27)
    - The name has changed to Pack Calculation Pro
    - Support of different units has been added (°C, °F, BTU…)
    - Documentation (help file) updated
    - Fixed bug related to automatic dimensioning of gas cooler
    - Fixed a couple of minor bugs.

v3.0.8 (2013-10-21)
    - Updated Bock CO2 compressors
    - Updated Bitzer compressors (hermetic and semihermetic screws are now included)
    - Added plot of Qe_del_only_MT (i.e. delivered cooling on MT evaporator only - Qe_del_tot_MT included condensing heat from LT system)
    - Fixed bug related to heat recovery (when ambient temperature was below temperature where heat recovery should be maximum)
    - Fixed bug related to systems with pumps (control was not implemented correctly)

v3.0.7 (2013-07-05)
    - Translations to the following languages added:
    -   Russian
    -   Romanian
    - Added several new, and updated several, Bitzer compressors
    - Added transcritical Copeland Stream compressors
    - Fixed a number of minor bugs, including:
    -   Proper saving of LCC settings
    -   Correction of calculation of off-design capacity
    -   Added hybrid cooler model (simple efficiency model)
    -   Fixed drawing of two-stage with liquid injection

v3.0.6 (2012-09-14)
    - Changes in installation to better support multi-user PC's and users without administrative privileges
    - Dutch and French languages added/completed
    - Published a translation package, which enable users to make their own translations

v3.0.5 (2012-08-24)
    - Fixed bug in "Two one stage, common condenser" systems
    - PackCalc now comes in the following languages:
    -   Bulgarian (translation not complete)
    -   Czech (translation not complete)
    -   Danish
    -   Dutch (translation not complete)
    -   The translation has been provided by members of the EU-project: "Improving Cold storage Equipment in Europe (ICE-E)"
    - Added Copeland Stream compressors + added and updated several scroll compressors

v3.0.3 (2012-06-11)
    - Fixed bug in load profile handling. Caused wrong results if:
    -   User created custom load profile
    -   The load profile was not saved to disk
    -   The systems that where compared where not created using the "Copy system" button
    -   If all of the above was true, then all systems where not compared using the custom load profile (the ones created using the "Add System" button, where using a constant load profile)
    - Added help button to explain all curves on the "Plots" page

v3.0.2 (2012-05-28)
    - Fixed bug when using speed controlled fans and free cooling
    - Fixed bug when using heat recovery
    - Fixed minor bugs (text strings, etc.)
    - Added possibility to change default DT gas cooler out when running transcritical. See "Options|Preferences|Calculation|Condenser control"
    - Added possibility to have different load profiles for the different systems (currently experimental...). See "Options|Preferences|Calculation|Suction side|Load profile" and "Options|Preferences|Calculation|Heat pump|Load profile". Default is that load profiles are forced to be equal for all systems.
    - Removed discontinued Copeland compressors

v3.0.0 (2012-03-13)
    - Heat pump model included
    -   One stage system
    -   Air and ground source
    -   Space heating only
    - Auto-generated compressors. Specify cooling or heating capacity instead of selecting compressors from database
    - Groundwater cooling can be used as supplement to mechanical cooling (one stage systems only)
    -   Only ATES systems with full thermal balancing included
    - Instead of specifying the evaporation temperature, it is now possible to specify the evaporator size (for one stage system). I.e. the evaporation temperature is output from calculation.
    - Updated ZB and ZF compressor models from Copeland
    - Warnings and errors shown in detail on both monthly energy consumption diagram and summary table
    - Icon illustrating calculation state next to "Calculate" button (emphasize warnings)
    - Plots changed so that weather data can be easily displayed
    - Misc improvements and bug fixes...

v2.3.1 (2011-04-01)
    - Added possibility to include water consumption (and rain water tank) in LCC calculation for cooling tower

v2.3.0
    - Bug fix so that new Dorin compressors are installed when updating an old version of PackCalc
    - Changed month and day names so that they are in the same language as the rest of the program (English)

v2.2.9 (2011-02-11)
    - New Dorin range of subcritical compressors (SCC range) added
    - New Dorin range of transcritical compressors (CD range) added
    - Improved model of Cooling Tower developed by Danish Technological Institute and Vestas Aircoil
    - Power consumption when using free cooling included
    - Possible to specify charge for both high and low side in cascade systems when calculating CO2 emissions
    - COP calculations for two-stage systems fixed (now condensing heat from low stage is not regarded useful when calculating overall COP)
    - Several minor fixes and changes...

v2.2.8 (2010-09-10)
    - Load profiles from building simulation program BSim can now be imported. See appendix D in user manual.
    - 60Hz Dorin CO2 compressors have been included
    - Minor changes...

v2.2.7 (2010-05-03)
    - Change in calculation of capacity for transcritical compressor in subcritical design condition (change only affects the compressor selection - not the yearly calculation)

v2.2.6
    - Bock transcritical compressors updated
    - Dorin SCS compressors added
    - Changes to userinterface so that users are presented to less options. This can be controlled in Options|Preferences menu

v2.2.5
    - First proper version