The new screw-type heat recovery chiller applications – slurry pump rubber liner
Editor's Note: Of energy around the air conditioning, reducing air conditioning energy consumption and corresponding greenhouse gas emissions to the topic, and introduce a new way of heat recovery chiller, concepts and systems form, control theory, performance evaluation factor, for such models. And put forward this new way of heat recovery chiller temperature and humidity and also on heating and air conditioning refrigeration and the applicability of energy conservation significance has opened up new areas of energy saving air-conditioning.
1. Introduction Growing as the economy and rising standard of human life, Air conditioning The applications are becoming increasingly popular. The air conditioning in adapting to economic development and to meet human needs, but also to the tremendous human burden of energy consumption and other negative effects such as the greenhouse effect, therefore, reduce air conditioning energy consumption for air conditioning Sustainable Development, has been be faced by the air conditioning design is an important and primary issue. In the paper the content of this article, there was need for air conditioning Energy consumption Classification, and air-conditioning energy saving technology has some classified.
2. Classification of air conditioning energy consumption
Air Conditioning For Electricity Power or steam; air conditioning water, gas transportation to power consumption; winter air-conditioning to the use of electricity or oil, coal and other natural energy resources, different seasons, different air-conditioning system has a different energy. However, the classification, can be summarized into two categories: power consumption and energy expenditure. The power consumption can be reduced to the most total energy consumption (excluding natural energy power generation), therefore, from the environmental point of view, all the energy consumption of air conditioning are energy consumption and CO2 emissions of greenhouse gases have a price.
Specific point of view, air-conditioning system, all electric equipment, power consumption there; all kinds of boilers, such as the presence of lithium bromide chiller energy consumption, in general, the summer air conditioning, in addition to lithium bromide chiller outside, are the main power consumption; winter air conditioning, consumption, thermal-based, but there is power consumption. A variety of gas source, water source, ground source air-conditioning system consumes only electricity.
3. Air Classification and comparison of energy-saving technology
Energy-saving technologies as air conditioning continue to explore the return, in air conditioning design, there are many mature technologies and related products can be used. Concrete can be divided into three types:
3.1 Save type: through the pursuit of high efficiency, optimize the use of automatic control systems and to strengthen, to save air conditioning energy consumption, reduce or avoid energy waste, saving energy. Such as: use of high efficiency products, optimize the system configuration, with variable air volume or variable volume, secondary air and other energy-saving operation control system and other energy-saving technologies.
In terms of its savings in energy consumption, saving air-conditioning power consumption, but also save air conditioning energy consumption.
3.2 can take advantage of the natural type: through the rational use of natural energy, while reducing air conditioning energy consumption, for example: fresh air cooling, cooling water, cooling, air, water and land and other natural sources of cooling and heating energy use technology.
Naturally use in the major savings in air conditioning energy consumption, it is noteworthy that its energy savings are considerable. In addition, saving energy consumption of air conditioning, thus reducing the corresponding CO2 emissions, so it has good environmental advantages and characteristics of sustainable development.
3.3 Heat Recovery: By recycling heat to achieve the secondary use of energy, reducing air conditioning energy consumption. If the new exhaust heat recovery technology. According to the different products, can be divided into: rotary or fixed plate-fin all (were) heat exchanger heat recovery, heat recovery coil, heat pump heat recovery, etc.. Others such as domestic hot water heat recovery chillers and so on.
Heat recovery systems on all of these savings in energy consumption analysis, the summer air-conditioning electricity savings in the general primary energy consumption, when using lithium bromide host, save the energy consumption of air conditioning. Winter of the major air-conditioning energy consumption savings when using natural gas to use in the host, such as heat pump, the savings in air conditioning electricity consumption. In short, the same good environmental advantages and characteristics of sustainable development.
As heat recovery chiller plant in the previous applications, the more frequent use of Series Condenser , Units such as the reasons for the structural design, heat recovery were usually the highest cooling load only 30% to 40%. Moreover, the heat recovery decreased with the amount of cooling load decreased rapidly can provide relatively stable. In addition, the recovery of heat are generally used for domestic hot water, domestic hot water use because of instability, heat recovery ratio is also time to time, sometimes high and sometimes low, stable operation of the unit a negative impact. Therefore, such heat recovery, although also a waste heat utilization, environment protection and energy has a certain significance, but less the amount saved on the stable operation of the system there is also adversely affected. However, when a new structure with the thermal recovery of the amount can be higher and more stable, and heat recovery for air-conditioning system itself, the heat recovery chiller plant savings in air conditioning energy consumption is considerable. Get a great sense of its energy to play.
Article explored below, is the heat recovery technology and its application of this new field.
4. The new chiller heat recovery means (hereinafter referred to as the new method)
To conventional screw chillers, for example, works on compression refrigeration, water chiller refrigerant in the evaporator side of the evaporative cooling endothermic, while the side of the refrigerant in the condenser in the condensate heat, and their release is greater than the heat absorption of evaporator heat, heat recovery means new goal is to recover 100% of the heat of the condenser for reuse, thus reducing the corresponding conditioning energy consumption, reduce air and the atmosphere generated by environment, greenhouse gas emissions.
New condensing unit recovery methods based on the condenser design, the integration can be called parallel condenser (hereinafter referred to as the new condenser), a group of conventional condenser coil, cooling water absorbs heat, the heat from the cooling tower will be scattered into the atmosphere, the general cooling water for the open loop system. The so-called integrated parallel condenser is defined in terms relative to a refrigerant condenser, but the water side of view, there are two parallel units of water coil, a coil which corresponds to the conventional model of work, for the open system, while the other group was heat recovery coil, with closed Cycle . From such a structure can be seen that any group of coils, as long as the allocation of adequate heat exchange area, are likely to absorb all of the condensate load. As a result, heat recovery was influenced by changes of cooling load can be completely eliminated. For example, when the unit is running cold negative
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