HVAC is an air conditioner with heating, air flow, and air conditioning functions

Since the principal features of HVAC include:

The three factors of heating, air flow, and air conditioning, abbreviated HVAC (Heating, Ventilating, and Air Conditioning), take the complete abbreviation of these three functions, that is, HVAC

HVAC refers to the device or associated tools accountable for heating, air flow, and air conditioning in a room or vehicle. The format of the HVAC machine is utilized for thermodynamics, fluid mechanics, and fluid machinery, which is an essential department in the discipline of mechanical engineering

Frequency conversion and drift charge technological know-how of air-conditioning water system

The cooling load of the central air conditioner modifications with the alternate ambient temperature and the vicinity of ​​use. The water pump motor of the water device of the regular float water machine is essentially jogging at full load, forming a phenomenon of giant float and small temperature difference. In view of this low effectivity and massive electricity consumption, Using the inverter of the air-conditioning water gadget to manage the operation of the chilled water pump motor, so that the glide of chilled water modifications in direct share to the cooling load, and has acquired exact energy-saving results and vast financial benefits. When choosing a frequency converter, the foremost consideration is the matching capability of the motor power, and at an equal time, elements such as excessive reliability, convenient operation, and lifelike charge have to be considered. After about 30 years of technological innovation, the frequency converter has turned out to be the mainstream of motor velocity legislation and performs a vital position in a number of industries. With the improvement of the full digital management technique of the frequency converter, its precision and reliability are high. High, exact stability, robust storage capacity, robust good judgment operation potential, and different benefits will be greater prominent, the financial advantages will be greater significant, and the scope of software will be wider

Cool and warmness storage, low-temperature air furnish, and massive temperature distinction technology

Air conditioning bloodless storage makes use of the distinction in time-of-use electrical energy fees to keep "cheap energy" for the duration of the trough duration of the energy grid, and releases the saved bloodless electricity in the course of the height duration of cooling ability to meet the necessities of the air conditioning load. According to the bloodless storage medium, there are three ways: water bloodless storage, ice bloodless storage, and eutectic salt bloodless storage.

Advantages of ice storage:

①The capability of the chiller is decreased by 38%

②The strength of the air-conditioning gear is decreased by 27%

③The annual running price is saved with the aid of 371,000 yuan. Ice slurry is a solid-liquid two-phase answer containing suspended ice particles, additionally acknowledged as fluid ice, binary ice. The ice particles are in the order of millimeters to centimeters, and alcohol and salt inhibitors are normally introduced to decrease the freezing point.

The utility blessings of ice slurry technological know-how are:

(1) Huge latent warmness of section change, and low-temperature smart warmth can be used (the melting warmness of ice is 335KJ/kg, and the precise warmness potential of water is 4.18KJ/kg.℃)

(2) Good fluidity, can be pumped To any place

(3) Ice melting and cooling speed, quickly thermal response

(4) Cold storage method is adopted to decrease device working fees and beautify the reliability of the cooling

District Cooling, Heating and Power and Distributed Energy Technology

The district cooling system, comparable to the city central heating device in the north, is to manufacture chilled water in a positive scale location through an exceptional refrigeration station and supply it to a variety of cooling structures via a chilled water pipe network, thereby offering refrigeration and air conditioning. carrier system

The district cooling device can be viewed as a large-scale central air-conditioning system, and its customers can consist of apartments, workplace buildings, hotels, purchasing malls, institutions, hospitals, and residences. District cooling device is appropriate for software in locations with excessive cooling load density and giant annual cooling load coefficient, such as industrial buildings, densely populated city commercial enterprise districts, etc. The district cooling device consists of three parts: the central refrigeration station, the chilled water transmission and distribution network, and the bloodless users. The central refrigeration station produces chilled water in more than a few ways. Its tools consist of fridges and auxiliary equipment, bloodless storage equipment, warmth change tools, and manipulation devices. The chilled water pipeline community transports the chilled water produced with the aid of the central refrigeration station to every user. Cold customers are constructions that require refrigeration and air conditioning, outfitted with terminal bloodless and warmth trade equipment

Compared with normal central air conditioners and break-up air conditioners, district cooling has the following traits and advantages: 1) High strength utilization effectivity 2) At the identical time, the utilization issue is small, and the mounted capability of the refrigeration host is small 3) The operation and administration personnel are reduced, and the protection satisfactory is increased 4) Environmental safety Obvious benefits 5) Conducive to the use of bloodless storage science 6) Improvement of architectural aesthetics and house utilization

Comfortable and energy-saving air conditioning science such as floor supply warmth pump

Ground source/water supply warmness pump air conditioners use water as the carrier. Through the floor supply warmth pump unit system, the floor temperature warmth power (groundwater or soil warmness energy) is transferred to the indoors of the construction to be heated in winter, and the warmth in the construction can be transferred in summer. Through the warmness pump unit system, the switch is transferred to the shallow strata of the earth. It makes full use of the regular temperature of groundwater or underground soil all 12 months round.

It has the following characteristics:

(1) Energy saving 30%~60%

(2) High effectivity and environmental protection

(3) Dual use in iciness and summer

(4) Life span of up to 25 years

(5) Reduce funding danger and store preliminary investment

Characteristic principle

HVAC is a family central air conditioner, and its largest function is that it can create an easy indoor environment. The regular break-up air conditioner in the domestic can solely clear up the trouble of heating and cooling, however no longer the air remedy process. With HVAC it is different.

The air cure system has the following steps: first, after the air comes in, in addition to introducing sparkling air, the air can be cooled and then filtered. , it can commonly seize very small particles of dust, typically speaking, it can seize dirt of one micron, and most of the dirt in the vary is bacteria, virus, smoke, or odor, so it can be filtered out; in addition, It is to add a humidification device. This humidifier can create a relative humidity of about 40% in the humidification of our room so that human beings will sense very comfortably.

Energy saving technology

1. Optimal choice of the warmth supply system

In the energy-saving layout technique of the HVAC system, the warmness supply gadget has to be chosen fairly in accordance with the proper scenario of the engineering building. Under ordinary circumstances, the frequent sorts of warmness sources in the Chinese market are warmness pumps, thermal energy stations, regional boiler rooms, small boilers, direct-fired lithium bromide absorption warm water units, etc. In phrases of strength utilization efficiency, thermal electricity flora normally have the best working efficiency, observed through warmness pump technology. The warmness pump commonly makes use of a giant quantity of renewable, low-grade electricity contained in nature as a warmness source, such as floor water, photo voltaic energy, atmosphere, geothermal, etc., thru the operation of the compressor, absorbs warmness strength from the warmth source, will increase the temperature and transmits it to the high-temperature warmness source. According to the exceptional electricity sources of warmness pumps, air supply warmness pumps can be divided into two parts. Mainly for business unit warmness pump air conditioners, family warmness pump air conditioners, warmness pump bloodless and warm water devices, and different sorts of floor supply warmness pumps, represented through soil type, can reap at least 30% strength saving target: direct-fired lithium bromide absorption unit, its heating effectivity is essentially comparable to that of gasoline boilers, however for boiler rooms, the software impact of cooling storage device in giant regional boiler rooms is higher than that of small boilers

2. Promote the use of frequency conversion technology

In the modern-day HVAC system, the utility of frequency conversion science has a robust inevitability. Through frequency conversion technology, it can now not solely make up for the procedure troubles of the air conditioning system, however, it additionally, limits strength consumption and working costs. Under everyday circumstances, the air-conditioning machine solely operates in accordance with the pre-designed rated power. In the case of low load, if the tools nevertheless operate at full load at the rated power, strength waste will inevitably occur. By making use of frequency conversion technological know-how in the HVAC system, the output electricity of the air conditioning gear can be adjusted with the alternate load, and the impact of electricity saving and emission discount can be exerted. Combined with the authentic load circumstance of the air conditioner, it should alternate the air drift or water float to gain the strength saving goal. On the one hand, the variable air quantity device makes use of the terminal system of the air conditioning machine to understand the compensation mechanism for indoor load, and optimizes the adjustment of the air grant to keep an appropriate indoor temperature; in contrast with the steady air quantity system, the variable air extent device can keep about 50% energy; On the one hand, the variable water quantity machine frequently adjusts the temperature through controlling the quantity, which saves extra electrical energy than the consistent drift system. With the advertising and use of industrial frequency converters in my country, by way of optimizing the adjustment of air volume, water quantity and predominant engine, the matching operation with the air conditioning load can be realized, and accurate strength saving advantages can be exerted.

3. Reduce the strength consumption of the warmth medium

In the HVAC system, the energy-saving engineering diagram ought to pay interest to the electricity consumption of every link. Taking the precise sketch and proper running prerequisites as the beginning point, a built-in air-conditioning energy-saving gadget is formed. Among them, the warmth medium transmission machine is a necessary phase of HVAC, and its warmth electricity transmission mode and fabric decision all have an effect on electricity saving. In the warmth medium transmission system, the choice of thermal insulation materials, such as without delay buried pipes, can realize the prefabricated thermal insulation of warm water, thereby decreasing the feasible losses in the manner of thermal strength transmission. In addition, the laptop device can be used to comprehensively take a look at the heating repute of the air-conditioning system, and the wise pipe network, stability valve, etc. can be used to optimize the configuration of the pipe community to go with the flow and beef up administration countermeasures, so as to enhance the operation effectivity and reap the purpose of electricity saving. Regarding the energy-saving sketch of the air-conditioning system, the energy transmission device can additionally be utilized to optimize the sketch and development of the energy machine and enhance the energy-saving effectivity of the air-conditioning system. The electricity machine needs to pick grant pipelines with precise load properties, excessive running efficiency, massive temperature distinction, and rheological speed, use practical and tremendous strength equipment, enhance transmission efficiency, and construct a suitable air-conditioning working system

4. Reasonably decide the air conditioning method

For HVAC systems, the remedy stage of its utility by and large relies upon an aggregate of elements such as wind speed, humidity, air humidity, common ambient radiant temperature, and people's appreciation of the environment. Therefore, the resolution of more than a few blended environmental parameters will produce unique thermal remedy effects: for example, the electricity consumption generated through the air conditioning machine will additionally be extraordinarily reliant on the thermal and humid environment. In winter, if the typical air-conditioning technique is chosen to extend the indoor temperature, the warmth and humidity alternate is carried out in the human physique and the surroundings via the air, and the required air humidity is high. In this case, the warmness loss of the heating sparkling air and the warmth loss of the upkeep shape are Relatively large; if the software consequences of the new thermal and humid surroundings can be applied, the air-conditioning operation mode can be optimized and the radiant warmness can be improved, the air humidity can be substantially reduced. 18 ℃ ~ 20 ℃, needless to say, the energy-saving impact of the new air-conditioning operation mode is extra objective. In an equal way, when the use of the air conditioning machine in summer, the new air conditioning operation mode is extra suitable. By applying this healthy, satisfied, and energy-saving new air-conditioning operation mode, it can no longer solely meet the wishes of high-level living, but additionally attain the intention of strength saving and emission reduction, which is steady with the improvement of a low-carbon economy.

5. Optimization of bloodless and warmness electricity recovery

At present, in addition, lookup is underway on the restoration of bloodless and warmness power in HVAC systems, in order to promote the effectiveness of bloodless and warmness power recuperation of air conditioning systems and to reap energy-saving dreams on the premise of making sure electricity utilization efficiency. Through the recuperation of exhaust heat, the exhausted strength can be higher used, the sparkling air can be pre-cooled or preheated, the load is reduced, and the power saving of the air conditioning gadget can be realized; the restoration of exhaust warmth can be divided into whole warmth restoration and good warmth healing There are two foremost parts. The restoration gear is normally a plate-type whole warmth exchanger, a wheel-type whole warmth exchanger, and a plate-type good warmness exchanger.

Energy saving and environmental protection

The scarcity of energy, the fast adjustments in the international surroundings, and the conventional prevalence of quite a number of associated dangers have made electricity conservation and environmental safety the mainstream of the present-day generation and has been deeply rooted in the hearts of the people. Since then, electricity-saving and environmental safety have entered all walks of lifestyle and grown to be the darling of the new era. In the HVAC industry, electricity-saving and environmental safety have additionally turned out to be the vogue of the industry

HVAC is an energy-intensive industry. Under the historical past of electricity conservation and environmental protection, a low-carbon and environmentally pleasant lifestyle have a profound influence on the HVAC market. Refrigeration Express journalists discovered in the interview that with the non-stop improvement of the HVAC industry, the product diagram is quietly changing. Low-carbon power saving has ended up the primary demand for HVAC products. HVAC organizations proceed to use superior technological know-how to enhance the strength effectivity degree of air-conditioning products, boost power preferences and renewable strength utilization, increase new refrigerants, etc. 

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