Projects

As part of Croatian forests There are several clone plantations that produce forest tree seeds, and among them is the seed clone plantation of wild cherries in the forest area. Polojac - Šartovac, nearby Kutine. The owner of the clone plantation is Hrvatske šume, Forest Administration Zagreb, Šumarija Kutina.

Qtech design has been hired to implement a pilot project of an antifrost system on 360 m2 of wild cherry in the most unfavorable location within the microclimate of plantations. The pilot project defined the input parameters required for the development of a technological project for the reconstruction of a permanent plantation using a frost protection system (antifrost system). 

 

The system in Kutina protected wild cherries at -5 ° C with a rainfall intensity of 2.8 mm / m2 / h of water. The maximum flow of the system was 1 m3 / h, which maintained a pressure of 0.5 bar on the pulsator throughout the night with the help of a free-fall water tank. The accumulation required for one day of protection was 15 m3 / h of water, and at low supply levels it was replenished from the accumulation lake by means of a pump to replenish the reservoir located at the highest point of the orchard. Energy consumption was 1.5 kW / h, which was spent on the operation of the pump to replenish the water tank. 

Within the microlocation of the system, one agrometeorological station was installed with equipment for meteorological monitoring and systemic monitoring of pressure within the water supply system (antifrost system and drip irrigation system). The agrometeorological station covers the microclimate within 3 hectares of plantations. 

 

 

The mission of FPS is to contribute to the full sustainable production of food and biosystems. The intersection of the FPS software and hardware solution allows fruit systems to maximize production by reducing costs and increasing yields. By applying this innovative technology, the FPS system efficiently collects system, weather and production data from various micro locations, and with the help of smart analytics improves production characteristics. Customer focus, continuous improvement and technical innovation of this system, position FPS as a unique market participant destined for rapid growth. 

 

 

 

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As part of the planned works on the arrangement of the Homeland Monument, the City of Zagreb hired the company Qtech design for the project of automatic irrigation system | automatic rainwater system. The system is supplied with water via the city water supply connection, which is located at the planned positions of the automatic irrigation system connection in the ventilation shafts of the fountain pumping station. The system is controlled by a digital current programmer. 

Monument to the homeland

As a project deposit for the preparation of irrigation system documentation, the designer was provided with a project for arranging the green areas of the Monument to the Homeland, made by the certified landscape architect Robert Duić.

 

Performance dynamics

The implementation of the irrigation system of green areas is divided into two phases.

The first phase includes the construction of the supply water supply installation for irrigation, these works are performed in the construction phase of the infrastructure of the facility, before the construction of roads and paths. The works of the first phase include the installation of watertight penetrations for the passage of pipes from ventilation shafts where they are located solenoid valves to watering surfaces.

The second phase includes the construction of an irrigation system, performed in the phase of filling the final layer of soil and planting plant material, before sowing the lawn. 

The works of the second phase include:

• installation of a complete pipeline starting from the connections to the supply line (performed in Phase I) to the manholes with solenoid valves,
• installation of distribution valves and solenoid valves,
• installation of lateral lines with irrigation devices (tubes drop by drop, sprayers),
• all earthworks required for the installation of plumbing and electrical installations and irrigation devices,
• all other assembly and craft works necessary for the execution of a complete and functional system,
• all actions required to connect a new automation system,
• all tests and trials required to demonstrate the functionality of the system
• all work on managing construction site documentation and making schemes of the performed state of installations

           

Water supply

Irrigation system it will be supplied with city water via the DN50 water supply connection with a minimum flow of 7.0 m3 / h and 4.5 bar (supply height of 45 m) located at the planned positions of the automatic irrigation system connection in the ventilation shafts of the fountain pumping station. This project includes irrigation on an area of approx. 4460 m²

Irrigation devices

Surfaces with flower beds, floor coverings and hedges are irrigated by dripping, so that the installation of a two-layer pipe with droppers with a flow rate of 2.2 l at a distance of 33 cm, with built-in pressure compensation, is envisaged. On all lateral lines s tubes drop by drop additional pressure regulators with a set outlet pressure of 2.0 bar are installed. Lawn areas are irrigated by an irrigation system using pop up sprinklers connected to the lateral line. The choice of sprayer and nozzle depends on the size of the surface to be irrigated.

 Pop up sprinkler

Management system

All controls are mounted on an outdoor installation. The irrigation system is divided into 17 zones of simultaneous operation via a solenoid valve with a diameter of DN40 (R1 1/2 ''), with a spool voltage of 24V.

Solenoid valves have the ability to manually operate and adjust the flow, and their construction prevents the return of water from the installation to the supply network. Solenoid valves are made of hard plastic, normally closed, for operating pressure up to 10 bar and medium temperature up to 43 ° C. Solenoid valves are installed in the ventilation shafts of the service room. For each solenoid valve in the system, the installation of a pressure regulator is provided to adjust the pressure in the lateral line, so that the irrigation devices work in the design conditions. The operation of the solenoid valves is controlled via a digital current programmer with a minimum of 20 control outputs 24V el. solenoid valves. The digital power programmer has an LCD display with a simple user interface, the possibility of flow control and flow control, a time sensor connection with a bypass switch, a master valve connection.

Digital current programmer 

Statement of flow along lateral lines

The following are the individual flows of lateral lines in the irrigation system, under the condition of optimal hydraulic operating conditions: 

• operating pressure on the lines from the pipe drop by drop - 2 bar
• operating pressure on lines with static sprinklers - 3 bar
• operating pressure on lines with dynamic sprinklers - 3 bar

Water consumption of the rainwater system of the Monument to the Homeland with 100% overlap is shown in the following diagram:

 

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OPG stjepan car is located in the town of Vrbovec, on 3000 m2 there is an orchard with various varieties of apples, pears, apricots, plums, cherries. Due to the early spring frosts, Mr. Car decided on the FPS frost protection system from Qtech design from Zagreb. The system is currently under construction and initial testing is planned for the fall of 2020. The system will be functional and ready to protect orchards from the early spring frosts of 2021.

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