Technology Wide Angle AO. Smith Independent Water Supply/Heating System Application in Business Hotel Cheng Liwei (Io Smith (China) Water Heater Co., Ltd., Nanjing 201038) 1AQ Smith Independent Water Supply/Heating System in Business Hotel QfKh-mqrCVPPr/ Application example of T=3 Holiday Inn Express Shanghai Jinsha is managed by InterContinental Hotels Group, which has 60 years of experience in international hotel management. Shanghai Hongxiang Real Estate Co., Ltd. invested and built. The hotel is located in Shanghai Putuo District Economic Development Zone, with 11 floors above ground and 2 floors underground. It has 252 rooms with a heating area of ​​about 10,000 m2 and a fan coil at the end. Holiday Inn Express offers a convenient and convenient service for business travellers with a new concept of comfort, convenience and value for money.
1.2 Calculation of hot water consumption The hotel has a total of 252 rooms, 10 restaurant kitchen sinks, 6 staff showers; room heat calculation of hot water according to the design specification of building water supply and drainage GB 50015-2003 (2009 edition) 5.3.1 According to the relevant provisions of the relevant provisions, all-day hot water supply hotel rooms (excluding employees) design hot water supply system design hour heat consumption should be calculated as follows: m water calculation unit (number of people or number of beds); qr hot water Water quota (L / person d or L / bed d), here take 160L (60C); tr hot water temperature, tr = 60 (C); t, cold water temperature, here take 5C; pr hot water density (kg /L), take 1 here; T daily use time (h), according to 5.1.1 of this specification, take 24h here; Kh hour change coefficient, can be used according to Table 5.3.1, here take 3; restaurant Hot water consumption calculation The restaurant kitchen has a total of 10 washing pools. According to the provisions of the building water supply and drainage regulations, the centralized hot water supply system for buildings, hotels, hospitals and industrial enterprises, public baths, dormitories and other buildings that regularly supply hot water. The design hour heat consumption should be calculated as follows: qh health The hourly water quota (L/h) with hot water, the hot water temperature of this tr, here take 50 (C); t, cold water temperature, here take 5C; pr hot water density (kg / L), here take 1; n the same type of sanitary appliances; water supply and drainage dynamic technology wide-angle b sanitary appliances, the percentage of simultaneous use, this time take 70%; employee bathroom heat calculation staff bathroom has a total of 6 showers, according to the building water supply and drainage design specifications GB50015-2003 (2009 edition) The provisions of the relevant provisions of 5.3.1, the design of the centralized hot water supply system for residential, hotel, hospital and industrial enterprise living quarters, public baths, dormitories and other buildings that regularly supply hot water should be designed according to the hourly heat consumption. The following formula is calculated: the total heat consumption of hot water is calculated to be 000m2, and the heating load is determined according to the design specification of the urban thermal network GBC 34-2002 3.1.2: the recommended heating index of hotels and apartments is 75W/m2; The heating load is: AO Smith DW-1810 commercial DC gas hot water boiler is recommended as the heat source of the hotel. The rated input power of single DW-1810 is 478kW, the thermal efficiency is 90%; the number of equipment is: 787.6+478+0.9= 1.83 units, Take two DW-1810 to supply hotel domestic hot water; the total heating load is 750kW, then the number of equipment is: 1.5 system indicates that the hot water and heating system are set independently, 2 DW-1810 circulating heating 30t open water tank, then the water tank is hot The water zone is supplied to the water end of the high and low zones. See 2; DW-1810 is heated by the plate heat exchanger for the hotel 10000m2, and 1~2 sets are opened from November to the beginning of April, 1.6 equipment room and smoke exhaust equipment room Located on the basement floor, see the boiler room of four boilers, covering an area of ​​about 30m2. The auxiliary equipment room (water tank and system accessories) covers an area of ​​about 40m2. See; four boilers are concentrated in the smoke pipe, extending from the underground floor to The top of the third floor (skirt); natural gas consumption is as follows: gas consumption is 100m3 / d; since the opening of the Holiday Inn Shanghai Sands in March 2012, the occupancy rate has been basically maintained at 80~85%, good energy performance Highly recognized by hotels and hotel groups.
2 Advantages of application of independent hot water/heating system in business hotels Through the hotel market research, business hotels (also known as "mid-range hotels") are mostly within 20,000 m2, and the single-story high-rise buildings are mostly in the form of buildings. ~250 rooms. Business Hotel In addition to South China, 0 water supply and drainage dynamic technology wide-angle response to the ceiling displacement of the flexible tube new technology Victaulic pipeline system (Dalian) Co., Ltd. advantage, this technology will play a positive role in ensuring the building fire protection function.
Ceiling ceilings (sometimes referred to as false ceilings) are common in commercial and industrial environments around the world. This article describes the unique challenges that such systems face in fire protection and fire protection, and provides a detailed explanation of security threats and technical solutions.
Risk ceiling ceilings are widely used in high-end hotels, auditoriums, shopping centers and other types of commercial and industrial buildings. This type of ceiling is highly sought after by engineers and architects because it provides a low-cost, easy-to-install solution while also hiding accessories such as distribution boxes and heating, ventilation and air conditioning systems.
The original design of the ceiling ceiling is to hide the bottom part of the upper floor. It is used for both hot water and heating. Because of the obvious annual demand and daily demand of hot water and heating, the traditional hot water supply during the non-heating season. The form of the shared hot water boiler with heating will inevitably lead to the phenomenon of large horse-drawn carriages in the boiler.
2.1 Independent water supply/heating system saves energy and stability. Water supply in East China is generally heated from November to early April. The method of independent hot water supply and heating system can greatly reduce the boiler supply during non-heating season. The backup heat loss, more accurately match the actual heat demand, saves operating costs; on the other hand, the independent hot water system and heating system can set the corresponding heating temperature, the water supply temperature is more suitable, the system does not interfere with each other, if one In the event of a malfunction, other devices can still be used.
2.2 Copper tube boiler heat exchange efficiency high AO Smith commercial DC gas boiler uses a unique all-copper finned tube heat exchanger, each copper fin tube is a special copper tube through the special points, and achieve indoor sound attenuation . This type of ceiling is generally constructed of a grid of cables suspended from concrete ceilings that can carry a variety of ceilings and fixtures.
Since being widely adopted in the 1960s, the integration of fire and fire protection functions in ceiling ceilings has been an annoying problem because the hard tube system cannot solve the full range of challenges it faces. The sprinkler head is formed by the spray process once, and the fins and the copper tube are integrated as a whole, which is not pressed later, which can ensure the best heat transfer. The thermal conductivity of copper is 407W/(m, K), which is much higher than that of ordinary steel plate material of 58.2W/(mK). Since the heat exchange copper tube has one-piece integral fins, the heat exchange area is greatly increased. The amount of heat exchange has been increased several times, and the thermal efficiency of the boiler can reach more than 90%.
3 Conclusion AO Smith's independent hot water supply/heating system only opens the equipment for supplying domestic hot water in the non-heating season to avoid excessive heating. The modular combination of supply methods can flexibly adjust the heat according to the season and occupancy rate. The number of water equipment to open, to achieve higher operating efficiency, effectively reduce the hotel's energy costs, to achieve "hotel energy management housekeeper", is the best solution for business hotel hot water / heating system.
Water supply and drainage dynamics
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