Nilan Calculator

Nilan Calculator
Nilan Calculator
Installation- and user guide
How to carry out a correct calculation of an Air Handling Unit (AHU) operation
– This question we asked ourselves a few years ago and we can now proudly present the
answer – Nilan Calculator Version 1.3.
The calculation program ensures a precise and truthful decision basis, when the most economic reliable AHU must be selected.
The program is thoroughly tested in order to achieve the greatest possible user-friendliness,
and it is being continuously developed in close dialogue with the users.
In order for us to ensure the optimal development of future versions, we will be glad for
feedback from our customers.
Thank you for choosing the Nilan calculator - enjoy!
Installation and user guide for Nilan Calculator
Table of contents:
1: Installation of NILAN Calculator ....................................................................................... page
2: Program update ................................................................................................................ page 11
3: A HU calculation review...................................................................................................... page 15
> AHU calculation .............................. page 22
> Calculation results .......................... page 24
4: Yearly calculation .............................................................................................................. page 31
5: Calculation of temperature efficiency ............................................................................. page 39
Installation of Nilan Calculator
The file (see below) have been sent on USB memory stick, CD-ROM or downloaded
from, and is intended to be opened and installed on your computer.
> Open the file
> Press Next
> Press Next
If a previous Nilan calculator has been installed on your PC, a dialogue box (see below)
may appear.
> Accept and press Yes
Installation of Nilan Calculator
> Press NEXT
> Press Install
> Press Finish
Afterwards dialogue box shown below appears.
> Fill in desired username
> Fill in the company name
> Fill in the e-mail
> Then press the button Mail License request
Nilan e-mails back to you a 16 digit license code, which is entered in the “License Code”
box and confirmed with OK.
The program is now ready for use.
Installation of Nilan Calculator
Program update
When a user receives an update file, following action must be carried out to update the
The file is stored on a known drive on the end-user’s PC. There will be reference to this file
when the program asks for it.
> Under the menu Tools submenu Setup System press Import.
The received file is imported in following way:
> The program opens a window, see below.
Choose / select the file and press Open/Åbn or double click the file.
The following image will appear!
Press Select all button and then OK button and the program is updated
Close down the Nilan Calculator down and restart the program where the updates
will be ready for use.
Program update
AHU Calculation Review
AHU calculation
Calculation results
page 22
page 24
AHU selection before calculation
Before the calculation can be made, it is important to select the correct AHU, depending
on the desired air quantities. In the overview
below, you will find a selection of different
Nilan AHU and their operating air volumes.
Nilan VPL serie
Air supply up to
Max. heating and cooling
Temperature efficiency
VPL 31
1800 m³/h (400 Pa)
6,0/7,5 kW
82 %
VPL 35
2500 m³/h (400 Pa)
9,0/11,0 kW
84 %
VPL 45
3500 m³/h (400 Pa)
12,0/14,0 kW
77 %
VPL 55
4500 m³/h (400 Pa)
17,0/20,0 kW
85 %
VPL 65
5500 m³/h (400 Pa)
22,0/27,0 kW
83 %
VPL 75
8000 m³/h (400 Pa)
28,0/35,0 kW
81 %
VPL 85
10000 m³/h (400 Pa)
36,0/43,0 kW
77 %
VPL 125
12000 m³/h (400 Pa)
43,0/54,0 kW
74 %
Nilan VPM serie
Air supply up to
Max. heating and cooling
Temperature efficiency
VPM 120
1200 m³/h (250 Pa)
4,5/9,5 kW
91 %
VPM 240
2400 m³/h (250 Pa)
8,0/16,0 kW
85 %
VPM 360
3600 m³/h (300 Pa)
12,0/24,0 kW
84 %
VPM 480
4800 m³/h (350 Pa)
15,0/36,0 kW
87 %
VPM 560
5600 m³/h (350 Pa)
18,0/41,0 kW
86 %
VPM 600
6000 m³/h (600 Pa)
24,0/44,0 kW
94 %
VPM 700
7500 m³/h ( 600 Pa)
27,0/50,0 kW
96 %
VPM 800
8000 m³/h (600 Pa)
36,0/66,0 kW
97 %
VPM 1000
10000 m³/h (600 Pa)
42,0/77,0 kW
94 %
VPM 1200
12500 m³/h (500 Pa)
56,0/97,0 kW
98 %
VPM 1500
15000 m³/h (480 Pa)
65,0/116,0 kW
96 %
VPM 2200
22000 m³/h (500 Pa)
85,0/146,0 kW
88 %
VPM 3200
35000 m³/h (500 Pa)
146,0/230,0 kW
92 %
AHU Calculation Review
How to get started?
In the following sections various input options in the program will be reviewed, and critical
values in the calculation will be presented.
Under the menu File user can select new project or an ongoing project can be saved.
In menu Tools, submenu System setup, updates to the program can be imported.
In the submenu language, users can select the required language (English, German, Danish, and Finnish).
AHU Calculation Review
The last point in this menu is Options, where different configurations for the calculation can be selected as described below.
In the Options menu under the tab calculation, a selection can be made about
how to calculate with a heat pump. The following possibilities exist: Operation
conditions (efficiency) and Yearly calculation (energy consumption in kW).
> By marking Compressor capacity, the program will calculate the heat pump’s
power as priority No 1, and will then select the option of either, reducing or
increasing the airflow, or increasing supplementary power to achieve the desired
inlet air temperature.
> By marking Both volume flows the program will reduce the volume of air
until the desired inlet air temperature is achieved. Be aware of evaporation and
condensation. See page 25.
> By marking Calculate additional heat the program will calculate the necessary
supplementary power to achieve the desired inlet air temperature.
Furthermore, under the tab Results and Year, the user can select which setup
values should be included in the printout.
Normally you will use the recommended values as shown in page 20.
Under the menu Help, the user can send a license request to Nilan A/S.
AHU Calculation Review
AHU Calculation:
In the following calculation with the Nilan VPM 1500 with: 14.900 m³/h is use as an example and the values for temperature and humidity are chosen by the customer.
AHU selection:
On the left side of the screen select the desired product (see also page 16-17), in this
example VPM 1500 (see marking No. 1). The program will always choose maximum air
volumes each time a new product is selected unless the following is marked Keep selected
airflow at the top of page (marking No. 2).
The following data needs to be filled out: air quantities, temperature and humidity of summer and winter operation. These can be marked if the user wants to use heat pipe in the
calculation. Finally the user can type in values for which conditions the calculation should
use. (Marking No. 3)
> Press Calculate to generate a calculation with the selected values. To the right side of
screen, under Results, the calculation result is shown (No. 4).
The calculation has temperature references to the units installation image tab under System
info. Here, the temperature may be transferred to provide an overview, for the user, of
where in the unit the temperature is present.
Important information:
In the summer calculation (cooling), the condenser temperature is monitored, (this should
not exceed 54°C).
In the winter calculation (heating), evaporator temperature is monitored, (this should not
fall below -5°C).
If the condensing temperature exceeds 54°C, in the cooling operation, there will be a
risk of the unit, when in operation, to receive an error message, when the condensation
pressure exceeds the maximum for the High pressure valve. In such a case the user must
ensure more exhaust air to cool the condenser!
If the evaporation temperature in the heating mode reaches below -5°C, frequently defrosting cycles may occur to ensure, that the unit does not fall into on the low pressure error,
due to the minimum setting on low pressure valve. In this case the user must increase
exhaust air volume to enlarge the amount of energy used for recycling.
AHU Calculation Review
Calculation results (walkthrough)
In the example shown, in the cooling operation, a temperature of 14.51°C after the evaporator can be reached.
The user can set a desired inlet air temperature in Fix temperature out of evaporator
(marking No. 1). For example, by selecting 16°C, the heat pump operation will be calculated for this value.
This feature can be used if the calculation shows a very high condensation temperature and
an inlet air temperature below that desired by the customer.
Here, the condensation temperature can be adjusted if it falls below the critical level of
In the heat calculation, seen above, the calculating evaporation temperature of 11,22°C is
shown (2). This is within acceptable levels.
AHU Calculation Review
If, for example, the user halved the volume of air in heating mode to7.500 m³/h, the resulting evaporation temperature will be -6.63°C (1). This value is outside acceptable levels
and a reduction of inlet air volume or choice of a larger unit is necessary.
Inlet air temperature is, by half airflow 24.22°C (2).
If in the calculation a temperature of 20°C is needed (3), it can be added to Fix temperature out of condenser. Then the result would be an evaporation temperature of -3.23 ° C
(4), which is within acceptable levels.
AHU Calculation Review
In addition, calculation with variable speed compressor can be selected, by marking at the
top of the sheet Use variable speed compressor. This gives a significantly reduced power
to the compressor.
Important Information
Defrost cycle starts at evaporation temperatures below -4°C and will be activated
every half hour. Cycle is active until evaporation temperature is again at +5°C.
If the after-heat element is not included, it’s important to assess whether the
project installation can handle the short-term lower inlet air temperature during
AHU Calculation Review
Yearly calculation
Yearly calculation:
By the previously mentioned options in the program a precise assessment of the unit operational situation can be made. The following should be assessed: the limits of the units
area of work and the necessary steps should be made to evaluate whether to increase or
decrease the airflow, or whether to choose an alternative compressor (e.g. variable speed
compressor) for the product, to satisfy the customer’s wishes.
In order to visualize for the customer: how much energy consumption goes to the operation of the reversible heat pump, the tab Yearly calculation allows the user to very
accurately calculate those costs.
In the following Yearly calculation will be reviewed, containing the various options.
Selection possibilities:
First selecting: the temperature data to be used in the tab Location. As country is chosen
and a climate zone in the country, is selected by a user.
Under the tab Schedule introduces holidays, when the unit is not operating. Thereafter a
selection is made about: which days of the week the unit must be operational. There are 3
forms to be filled out: Monday to Friday, Saturday and Sunday.
Yearly calculation
For each, a schedule can be selected if unit must be running all day and whether there
should be changes for any differences like opening and closing hours of the office or shop.
In this case, the unit will run all the time Monday to Friday with different set points. The
setting of this is mention later in this text. Saturday operating from: 9 – 15, Sunday: no
Under the tab Summer (1), the previous values for air volume, temperature and humidity
are automatically transferred.
It will be necessary to set points for day and night (e.g. within and outside of opening
At the same time, the user needs to select at which outside temperature active cooling will
start. The following example is chosen: cooling to start by the outdoor temperature above
16°C with an inlet air temperature of 16°C within opening hours. Outside of opening hours,
there is an active cooling by outdoor temperatures above 20°C with an inlet air temperature
at 18°C.
Under the tab Winter (2) same parameters for heating cycle must be chosen. In this
example: heat recovery must start at outdoor temperatures above 15°C with inlet air temperature of 20°C within opening hours. Outside of office opening heating operation starts at
outdoor temperatures above 15°C with an inlet air temperature of 18°C.
See settings below.
Yearly calculation
Then press the button Calculate and the calculation starts. Calculation for every hour in the
chosen work time is performed, so it can take some time.
The result will be found on the right side of the screen, divided in: Heating, Cooling and
Total. Length of time it takes to calculate the result is dependable on its complexity.
Print out
Eventually a printout of the calculation can be produced, under the tab Report (1). Print out
can include project name and customer information.
If there are important comments / information to the client regarding calculation, it can be
added in space for Comments. The information needed on the printout is marked.
Finally, there is an option to print Info files (2) about the unit, described in paragraph about
Unit information.
AHU information
Under the tab system info (1), a sketch of the unit with temperature points correlating
to the calculation is shown. In addition the following is attached: information about the
unit (2), dimensional drawings, capacity curves, etc. New details will be added here in the
Yearly calculation
Calculation of temperature efficiency
The Nilan Calculator as standard: calculates the temperature efficiency at outside air of: 5°C
and 0% relative humidity and 25°C and 0% relative humidity.
These temperatures can be adjusted as desired.
The result can be found in Temperature Efficiency.
Important Information:
Temperature efficiency is not counted calculated with condensing moisture in the exhaust
air. Additionally the energy to the compressor is also not included in the calculation.
Since power provided to the compressor is excluded, a choice is made to calculate the
power of evaporator. This power is calculated as temperature increases and is added to
temperature change over the heat-pipe.
Temperature efficiency coefficient is calculated on basis of inlet air temperature.
Calculation is made as shown below!
Calculation of temperature efficiency
NILAN A/S has made this software as robust, error free, relevant and as easy to use as possible. However, NILAN A/S
Cannot guarantee that the software is free from errors and since it is practically impossible to build in safe guards
preventing the program from being used in ways that were not intended or used for calculations beyond the limitations of the underlying simulation models, we can therefore not accept any legal responsibilities what so ever for any
consequences arising from the use of results obtained using the software.
Users are advised to evaluate all results on the heat pump thoroughly before they are used.
Nilan A/S
Nilanvej 2
DK-8722 Hedensted
Tel. +45 76 75 25 00
Fax +45 76 75 25 25
[email protected]
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF