Gurewicz Spa Resort
Otwock. Poland
2022
Light Commercial, Control, VRF, Restaurants, Hotels, Offices, Public buildings, Others, VRF Smart Connectivity, ECOg Gas Heat Pump
Outdoor units:
Indoor units:
Challenge
Solutions & Tech Applied
Taking into account the balance of heat, cold and electricity and information on the year-round demand for cold and heat, we launched an interesting and world-unique project: 1. Ecological and innovative micro-trigeneration solution adjusted to the year-round needs of the facility. 2. Heat recovery (GHP + MCHP) + freecooling, which guarantees low running costs irrespective of the increased prices of utilities. 3. Gas-based technology (security) – lower running costs + waste heat – resistance to blackouts or decreased power supply in key situations (summer, winter) at the hospital facility 4. Distributed system (security + flexibility) – 9 generators instead of 1 or 2 – security, longer life cycle, lower maintenance costs – rotation – one common and flexible system – better adjustment (vs chiller + boiler) – lower power consumption 5. Not necessary to use a redundant source of heat/cold thanks to the use of natural gas and propane supply of one common heating-cooling system 6. Much reduced noise of the distributed system when compared to the large system of chilled water, which would be an enormous challenge in this location, near the residential buildings 7. The preliminary findings show that the investment surplus should pay off within 5, 6 years. However, taking into account the projected increase in energy prices, the ROI ratio may reach the value in even 3,5 to 4 years. Most interestingly: We carried out several simulations: it does not matter the price of which medium increases, gas or electricity; the investor still wins thanks to freecooling and heat recovery for DHW, process heat, central heating, whereas the excess waste heat can be used for generating additional cold in the adsorption process. It turns out that savings due to the application of heat recovery and freecooling are 2 to 2,5 times higher than savings due to the fuel changed to gas; therefore, the technology used at this facility is so unique.
Detailed description of the equipment systems – GHP – year-round generation of heat and cold off gas + waste heat 9 x 70 kW cold = 630 kW 9 x 80 kW of heat = 720 kW. The quantity of waste heat 9 x 46 = 414 kW – VRF – for technical rooms – 56 kW – PACi – for the server room –7.1 kW – MCHP microgeneration – year-round generation of heat and electricity from gas 2 x 20 kW of energy – 40 kW of electricity (scope 10-40) 2 x 40 kW of heat = 80 kW of heat – absorption – 3 hydraulic circuits – low, medium, high temperature, generation of cold from waste heat during transitional periods (spring, autumn) and summer. 50-70 kW of cold from waste heat depending on the parameters of the respective circuits, winter freecooling – up to 100 kW of free cold due to freecooling (as there are 2 generators, it could be possible to use 200 kW if the facility were to be extended). The operating principle varies depending on the season; the detailed description can be found in the additional information and attached documentation.