Hydropower stations for clean water
Hydropower stations for clean water
Description
Hydropower stations are intended to maintain pressure in the sanitary or hydrant water supply network of high-rise buildings, hotels, hospitals and schools in residential areas, residential buildings, or industrial facilities. They are also intended for water pumping in various industries. The pressure in the city network is usually too low to supply high-rise buildings with water. Appropriate pressure and enough water for the sanitary or hydrant network are provided by a hydro station placed in the basement of the building. Hydropower stations are designed as compact devices with two or three vertical pumps controlled by a microprocessor. Versions with frequency control of pump speeds ensure a constant pressure in the plumbing. The hydropower station can be installed in a relatively small space and does not require additional installations in the building. This means that it can replace an old dilapidated hydrophore device.
Technical characteristics
Flow: from 25 to 990 l/min
Lifting pumping height: up to 145m
Motor power: 1.1 ÷ 10kW
Power supply: 3-phase (400V)
Medium temperature: from 0°C to + 40°C
Ambient temperature: from 0°C to + 40°C
Weight: 160 – 461kg
The hydro station is designed as a compact whole. The pumps are equipped with three-phase direct-start electric motors. Thermocouples are installed in the windings of electric motors to protect against overload.
All components are mounted on a joint base which allows easy transport and easy installation. The installation of the hydrostation is carried out by installing it in a room that is separated from the living quarters by appropriate insulation, in order to prevent the transmission of noise. Although the hydrostation is equipped with rubber feet, we recommend placing the station on a base made of a material that prevents the transmission of vibrations. It should be placed in a room at a distance of at least 1 m from the wall on all sides. This will allow easy access during servicing. The pressure and suction connection of the station is possible from the left or from the right. The hydrostation is connected to the local water supply network or draws water from the collection basin, in which the water level is above the hydrostation. In case the level in the reservoir is lower than the pump, we must use a special hydrostation, where each pump will have its own suction pipe to the reservoir. When starting the hydrostation, it is necessary to make an electrical connection in accordance with the operating instructions, set the operating parameters and check the pressure in the diaphragm pressure vessels.
On and off control is performed by a microprocessor that controls on and off by means of an analog pressure sensor on the pressure connection of the hydrostation. The setting can be arbitrary and can be done using the switch next to the LCD screen in the control box. Most often the setting of the same on and off pressures is chosen. In this way, we achieve the smallest pressure fluctuations at the pressure connection of the hydrostation.
Purpose of use
supply of facilities with wastewater reservoirs lower than public sewerage
for larger fecal and sewage systems
industrial purposes
utility systems
tall buildings (blocks, hospitals, hotels, schools, and various other institutions)
utilities
wastewater pumping stations
Depending on the purpose of using the hydrostation, we divide it into 3 basic types in which several different designs are then possible:
Firefigthing hydrostation with microprocessor control type (HP… IP)
Hydrostations with microprocessor control type (HP… IH)
Hydrostations with frequency regulator type (HP… IF)
The correct choice of the hydrostation is made by a detailed calculation of the required flow and pressure and based on compliance with the applicable regulations for individual areas of operation. The recommendations from the diagram below can be used to facilitate and informatively estimate the required flow. When determining the flow for firefighting hydro stations, it is necessary to additionally take into account the prescribed flow on an individual hydrant (2.5 l/s) and the number of simultaneously operating hydrants. The required pressure of the hydrostation is the sum of:
pressure to overcome the height of the building,
pressure at the highest outlet,
pressure losses in the network.
When the station is directly connected to the local water supply, the value of the required pressure is reduced to the amount of pressure at the suction connection.
In the case of stations without frequency control, the switching pressure of the pumps is thus determined. The shut-off pressure of the pumps is 1 to 1.5 bar higher. The hydraulic station must be selected so that it reaches the pump shut-off pressure at reduced flow.
Required flow estimation diagram
Hydrostation components
1. vertical multistage pumps
2. control cabinet
3. non-return diaphragm valve at all pump pressure connections
4. common pressure pipe with:
pressure sensor
manometer
membrane pressure vessels
shut-off valve
5. common suction hose with:
pressure switch or the supplied float switch
shut-off valve
6. support
7. rubber feet included
8. supplied rubber expansion joints with flanges for pressure and suction connection of sanitary stations
Diagram and basic dimensions of the hydrostation
1 Microprocessor-controlled firefighting stations (HP… IP)
Firefighting hydro stations with microprocessor control type HP… IP are intended for maintaining the pressure in the hydrant network. They are made in a version with two or three identical pumps.
The pumps are controlled by a microprocessor which enables the hydro station a number of functions:
On and off control
Dry running protection of pumps
Protection against electric motor overload
Network phase protection
Delay on and off
Alternating pump operation
Pump testing
Signaling
2 Hydropower stations with microprocessor control type (HP… IH)
Hydropower stations with microprocessor control type HP… IH are intended for installation in facilities where pressure fluctuations between on and off pressure are permitted. They are made in a version with two or three identical pumps and in a version with one smaller (pilot) and two larger pumps.
The pumps are controlled by a microprocessor that enables the hydrostation to perform many functions.
On and off control
Dry running protection of pumps
Protection against electric motor overload
Network phase protection
Delay on and off
Alternating pump operation
Pump testing
Signaling
3 Hydropower stations with frequency regulator type (HP… IF)
Hydropower stations with frequency regulator type HP… IF are intended for installation in facilities where a constant pressure in the water supply network is required. They are made in a version with two or three identical pumps. The pumps are controlled by a microprocessor with a frequency converter that regulates the speed of the first pump. The system provides optimal operating conditions for the pumps and provides significant energy savings.
The pumps are controlled by a microprocessor with a frequency converter which enables the hydrostation several functions.
Speed control of the first pump
On and off control
Dry running protection of pumps
Protection against electric motor overload
Network phase protection
Delay on and off
Alternating pump operation
Pump testing
Signaling
