National demonstration project of Dalian Dayaowan water heat pump works Festival
Dayaowan Dalian Port Container 3 auxiliary building area total of five single building with a total construction area of 16000?. The project designed by the Moon and construction.
Moon Dayaowan port has been successfully in the design and construction of five water
Heat Pump Project The project is the fourth project, up to now has been running for three years. Although this process is full of hardships, frustrations, but also extremely fulfilling and happy. Because our mission in the engineering and technical personnel through hard work, constant reform and innovation, and ultimately achieved good practical results.
Because Dalian is located in the northern cold regions, winter water temperature close to 0 , restricted the hot water
Pump Technology development and application bottlenecks. Consequent use of "water + temperature" coupling method for the extraction of sea water temperature is inevitable. Because the water in the infiltration process and the backfill layer, rock heat exchange occurs, the heat and mass transfer process so that underground water temperatures in winter and summer sea temperatures. Water heat pump technology to provide favorable conditions. However, the basic formation of the geographical area for the hydraulic fill dredged material, poor water permeability. Can only choose the cofferdam on wells for water, although water permeability of the problem solved, but the well water temperature was only 3-4 higher than the sea surface temperature around. Not only affects the heating efficiency, and even affect the unit's normal start.
This end, we gather intelligence, focused on solving the limited protection of geothermal resources.
1. In the equipment selection configuration, break the conventional design of sizes ranging from heat pump, heating it in the first, middle and later periods of time, the environmental temperature and the different changes in water temperature, corresponding to open the station units and pumps. Both reached
Energy Effect, and also protect the geothermal resource.
2. In the plate heat exchanger device, an increase of 30% of the heat transfer film, and at the same time to clean plate, reducing the temperature difference, increases the heat transfer area and heat transfer effects and improve the low temperature under operating conditions.
3. In the design of desander (has been the national patent), set the pass line, using two desander import and export of opening and closing, in the heat exchanger initially kept at 10 after water recharge to the closure of more than one pumping well, until the late heating water by heat transfer temperature lower than 10 , after, and then row to the sea water, shallow geothermal field to ensure the accumulation of heat is not consumed in vain.
4. In intelligent control, frequency conversion technology automatically adjusts water usage, that is, high water temperature, flow rate becomes smaller, the water temperature is low, the flow becomes larger, thus ensuring the effective flow of supplies to warm.
5. Great line leak in the rain, the rain of a major line will be taken over sealed to prevent infiltration of water through the seams close to the Well, a design of two large non-return valve (has obtained the national patent ) the effective barrier at high tide sea water intrusion into the big water line to protect the low-temperature geothermal resources from the impact of sea water.
In summary, due to a series of responses to three auxiliary heating effect of the construction area has been in a state of normal operation. Dayaowan by the Moon in the implementation of the five water heat pump works, with no use of auxiliary heating methods. Even though last winter's cold has not experienced for several decades, sea ice, and even reach below 0 , heating effect is still, as always. Fully proved Moon water heat pump technology in the leading edge. Currently the company is construction of Changxing Island to water heat pump, the more mature and sophisticated technology, is bound to a low carbon economy and the cycle of our city's economic development, consolidate technology base. Hence, in our snappers several times, have intimate knowledge of the sea water heat pump technology in the area north of the city and the further promotion and application, more full of confidence.
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