Total volume of water used in the system must be above a certain volume threshold so the cooling system used for comfort and industrial purposes function smoothly and efficiently. This volume is determined based on the capacity and the required control accuracy. If the total volume of water in the system is below this limit, SANCAK-BF series Buffer Tank may be added to increase the thermal capacity.
It is a tank design and manufactured specially for the purpose of increasing the water volume of the system in all cool water applications requiring additional water volume.
Industrial cooling applications
Cooling applications aimed at air-conditioning
Capacity calculation tips
The following methods are used to determine whether a buffer tank is needed for cooled water systems and to calculate the volume of SANCAK-BF series buffer tank if it is needed.
Minimum Water Volume Required (I) = Total Cooling Capacity (kW) x B (l/kW)
Coefficients recommended by cooling group manufacturers may be used in the calculation of the Minimum Water Volume required for the system.
Then, System’s Active Water Volume must be found. The volume that should be taken into account it the volume of water circulated in the evaporator even in the case of the minimum loading. Water volume of the equipment by-passed by the automatic valves (or of the zones that are not a part of the circulation system) should not be taken into account as majority of them shall not contribute to the active volume when operated under low load. In practice, taking water volumes of the pipes in the system into account shall be a safe solution. Water intake capacities per metre are given for steel pipes used in the mechanical installation.
|Type of application||B|
|General comfort applications||6|
|Applications requiring precise heat control (process, etc.)||10|
|Pipe diameter (inch)||Water capacity (l/m)|
Volume of the buffer tank is calculated by deducting the system’s water volume from the required water volume.
Volume of Buffer Tank (l)= Minimum Volume of Water Required- System’s Active Water Volume
If the result of this operation reveals a positive value, a buffer tank should be used and a tank with a capacity closest to the value found should be selected. If the required volume exceeds 5000 litre or there are restrictions in terms of layout, multiple tanks may also be used in the system.
There are steel pipes with total length of 550 m that are not by-passed by automatic valves in a process cooling system with total cooling capacity of 700 kW and requiring precise heat control. Pipes with 6″ diameter are used for 150 metre of the line, 4 ” for 100 metre and 3″ for 200 metre. Let’s find if a buffer tank is needed in this system.
Minimum Volume of Water Required= 700kWx10IkW=7000I
System’s Active Water Volume=(150×18.8)+(100×8.3)+(200×4.8)=4610I
Buffer Tank Volume=7000 – 4610 = 2390 I
It is required to use 1 SANCEK-BF series 2500/10-V type buffer tank with a capacity of 2500l.
Project design recommendations
The locatıon of the tank in the cooled water line should be in compliance with the intended purpose within the system as SANCAK-BF Series Buffer Tank is used for both preventing overloading with the cooling group compressor and surges in the temperature of water fed into the system.
It is recommended to install the tank before the cooling group in typical comfort applications where the function of buffer tank in preventing overloading with the compressor is important.
If it is used in an industrial cooling system, it will be more beneficial to install the tank after the group and before the system as the main purpose in this system is precise control of the process water temperature.
Important Note : If more than one tank shall be used in the system, it is recommended to connect the tanks in serial order rather than parallel order in order to ensure good circulation without any short-circuits.
|Capacity||100 – 5000 Liter|
|Area of Use||Water temperature that doesn’t exceed 90 °C|
|Operating pressure||10 Bar|
|Installation position||Vertical (horizontal as an option)|
|Coating||2 layers of anti-rust paint on external surface|
|Heat Insulation||Open-cell soft polyurethane in 50 mm thickness|
B Air Relief B Air Relief B Air Relief
Discharge C Discharge C Discharge C
|Ölçüler||Bağlantı Ağızları||Boş Ağırlık (kg.)|