Stable heating system delivering instantaneous hot water
The blocks of flats along Romena Rollana Street in Kiev have recently had their district heating and hot water system reconstructed. Several outdated heating stations and an ineffective hot water system were until lately supplying the 220 flats, but after the reconstruction one single high-efficient substation is enough to supply all of them.
Viktor Vasilievich, a resident in the blocks for 37 years, is very satisfied because both the heating and hot water supply has become much more stable and reliable than ever before. - Until this project finished we often had to let the hot water tap run for almost half an hour before the water turned warm. Sometimes it didn’t become warm at all. Now I just open the tap and the hot water is instantly warm - and even warmer than before, Viktor Vasilievich says.
This is due to the fact that the new substation is taking care of recirculation of the domestic hot water inside the building. Before the reconstruction, it was sent to the customers directly from the power plant several kilometers away. According to Vadym Aldoshyn, manager of District Heating & Water of Danfoss Ukraine, this meant a huge loss of heat in the hot water pipes, so that the water arrived to the flats being only 40 degrees Celsius warm. Today the water is sent to the flats at a constant temperature of 55 degrees.
Moreover, the flats are warmer than prior to the reconstruction because the heating system is much more stable. The improvements will also result in lower heating bills. - Before customers paid for heating all year around, whereas now they don’t pay in the 5 (summer) months when the district heating system is switched off, Vadym Aldoshyn explains.
The private construction company Teploenergomontazh has done the reconstruction project in co-operation with Danfoss. Vasiliy Bondarenko, a technical director from Teploenergomontazh, explains that the substation saves the blocks of flats 30-40% of their energy consumption compared to previous years, so the project is a huge success.
Click the below PDF document to read the full case story with all the details and more photos