Abstract: Water-ring heat pump air-conditioning system refers to the water loop will be small water / air heat pump units connected in parallel to form a recycling heat recovery within the building as the main feature of the heat pump heating and cooling air-conditioning system. The early 1980s, initial application in our country. However, due to some projects after installation and use of the effect is not satisfactory, or even unusable, so most people think this is a bad air conditioning system. In this paper, a practical example of the project, introduced the application of new water ring heat pump and its prospects.
Foreword:
The so-called water ring heat pump air conditioning system is a small water / air heat pump unit application. That is, the water loop will be small water / air heat pump units connected in parallel to form a recycling heat recovery within the building as the main feature of the heat pump heating and cooling air conditioning system. In the early 1980s, water-ring heat pump air-conditioning systems were adopted in some foreign-invested buildings in our country. These projects show that the water-ring heat pump air-conditioning system has the unique function of recovering residual heat in buildings. Unlike the traditional heating system, Resulting in serious government dyed; save or reduce the conventional air-conditioning system, cold and heat source equipment and room, to facilitate household metering and billing, ease of installation, management and so on. However, due to the blind installation and use of some projects, there are some problems in operation and management. Coupled with the consideration of environmental protection in the country, restrictions on the use of groundwater have made the majority of people have some misunderstandings about the water-ring heat pump system. Think this is a bad air conditioning system. Well, water ring heat pump system in this situation now really useless?
A new water ring heat pump system introduction
The emergence of a new water ring heat pump so that we have a water ring heat pump system has a new understanding. The so-called "new type" here refers to this water ring heat pump air-conditioning system is different from the previous water ring heat pump system, the main differences are: 1. The system does not have natural water source to do the cold source, replaced by cooling towers and hot water boilers; 2. Heat pump unit from the original "integrated" into "split" type, that is, the compressor and the coil in the form of separation, that is to solve the noise, but also to install and use more flexible; 3. As a result of the efficient compressor , Heat pump unit greatly increased the energy efficiency ratio, an average of 4.2 or more, has been close to the central air conditioning; 4. Heat pump unit condensing coil from the original double plate to tube, to solve the problem of prolonged use of the blockage.
The new water ring heat pump to abandon the previous water source heat pump noise, limited use of the drawbacks, and promote the water source heat pump for household metering and billing, ease of installation, management, etc., so that this air-conditioning system has rekindled a new vitality And vitality.
2 water ring heat pump in the project application
The project uses the function of office complex, equipped with offices, restaurants, exhibition halls, banks, etc., from South Tower and North Tower, South Tower is six, North Tower is nine, two buildings connected by the gallery. The project construction area of ​​about 30700m2, air conditioning area of ​​about 24050m2. As Party A is also the use side, Party A according to the requirements of the air conditioning system design made the following requirements: 1. North Building 3-9 may be leased or sold in the future, air conditioning system requirements and other parts of the separation; 2 air conditioning system operation and meter Fees to facilitate, to ensure the independent use of all units.
According to the request of Party A, I designed two options for Party A's choice, 1. Commercial air-cooled split-type machine; 2. Water ring heat pump system. Finally, as a result of the program 1 on the building facades greater impact, and the cooling efficiency is low, so the final choice of water ring heat pump system. The project set up two air-conditioning systems, 1. South Building and North Building, a floor, a system, air conditioning area of ​​about 10120m2, design and selection of three square cross-flow cooling tower, located in the North Building roof, the corresponding four cooling water pump (Three with a prepared); 2. North Building, three to nine as a system, air conditioning area of ​​13930m2, design and selection of four square cross-flow cooling towers, located in the North Building roof, the corresponding five cooling water pump Prepare). According to the function of use, the ends are respectively designed as full-air low-speed air-conditioning system (water cooler) and fan coil or double outlet type (water-cooled separate heat pump unit) plus fresh air system ); There is also a small part of the 24-hour use of local air-cooled split air conditioner design.
This program can be said to fully meet the Party's use requirements, billing only cooling towers and cooling pumps are part of the public share, and this part of the electricity in the air conditioning power inside is a small part of the other most of the electricity In the end users, air-conditioning billing all included in the electricity used by users inside, so fully realized how much to use less. When the transitional season or someone night plus night shift, the end unit boot less, then the cooling tower can only open one, saving running costs. The renting part of the North Building can be changed according to the needs of the tenants, or the cooling water interface can be reserved. The equipment is installed by the tenants themselves. This can also reduce the initial investment of the Company and avoid the economic loss when the occupancy rate is low.
3 water ring heat pump in other types of building applications analysis
As many central air conditioning systems are gradually emerging billing disputes, air conditioning billing has become a major property management problems to solve the existing central air conditioning system and the new design of central air conditioning system billing problems designers should now consider One of the most important issues. From this project I found that the water ring heat pump air conditioning system for the current rental office system is very applicable, it not only solved the billing and operational management issues, but do not have a separate air conditioning billing system and central air conditioning room, Reduce the cost of central air conditioning system. So this air conditioning system is suitable for other types of air conditioning system? The conclusion is positive, such as hotel-type buildings, even if there is no central air conditioning billing problems, but when the room vacancy rate is high, you can turn off the room air conditioner, leaving only the use of the part, which can greatly reduce air conditioning electricity bill.
4 Conclusion
For a multi-unit use of buildings, water-loop heat pump is a good air-conditioning solutions, it is not only easy billing, and operational flexibility in the winter heating areas can also use natural heat source, such as Geothermal, factory waste heat to heat. This air-conditioning system not only reduces the initial investment of Party A, but also reduces the user's air-conditioning use of the cost, thus reducing the air-conditioning energy consumption, to solve the increasingly tense summer air-conditioning electricity is helpful.
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