Category Archives: Advice

Energy-saving technologies in Modern chillers

In the development of modern HVAC equipment of particular importance is given to the problem of energy conservation. The amount of energy consumed by the equipment during the annual life cycle is one of the main criteria for decision-making when considering proposals submitted to tender. To date, a significant potential for energy efficiency is the development and establishment of climatic equipment, able to cover as precisely as possible the load schedule in constantly changing conditions

At the same time, the daily schedule of excess heat is also uneven pronounced maximum. Traditionally, chillers with capacity of 20-80 kW installed two identical compressors and make the two independent refrigerant circuits. As a result, the machine can operate in two modes at 50% and 100% of its rated capacity. The new generation of chillers with cooling capacity from 20 to 80 kW allows you to perform three-stage capacity control. In this case, the total refrigerating capacity is distributed among the compressors in a ratio of 63% and 37%.

The new generation of chillers both compressors are connected in parallel and operate on a single refrigerant circuit, that is, have a common condenser and evaporator. This arrangement significantly increases the energy conversion efficiency (KPI) of the refrigerant circuit when operating at part load. For such chillers at 100% load and outdoor temperature of 25 ° C KPE = 4, and at the 37% CPE = 5. Given that 50% of the time the unit is working with a load of 37% of this gives a considerable energy saving.

Microprocessor controllers

Microprocessor controllers are set for the effective implementation of new solutions in the chillers, which allow:

control all the operating parameters of the equipment;
adjust the set point temperature of the water at the outlet of the unit in accordance with the parameters of the outside air, process or commands from a centralized control system (supervisor);
selects the optimal power control step;
In the case of real need to quickly and effectively perform a defrost cycle (for heat pump models).

As a result, an automatic compressor to minimize the short-inclusions, optimize working hours of compressors and the adjustment parameters of the water leaving the chillers in accordance with real needs. As on average, it takes place during the day only 22 incorporating compressor while the compressor includes conventional chiller 72 times.

Another important advantage which enables the use of new chillers, is that eliminates the need for installation of bulky storage tanks and built into the body of the unit circulation pump eliminates the need for an additional pump station.

Energy-efficient gas compressor

As you know, for the accurate performance load curve of the chiller is very important type of used compressors. Traditionally, large capacity chillers used piston or rotary screw compressors. The reciprocating compressor has many moving parts and, consequently, low efficiency due to large frictional losses. In the operation of reciprocating compressors there is a high level of noise and vibration, as well as there is a need for their regular maintenance. Screw compressors, in turn, have a complex structure, and as a result, very high cost. Production of screw compressors is low-profit.

Service of such compressors consuming and requires highly skilled personnel. In recent years, the market of new type of compressor SCROLL appeared that lack specific deficiencies reciprocating and screw compressors. Scroll-compressors have a high energy efficiency, low noise and vibration, and require no maintenance. This type of compressors is simple in construction, is very reliable and, at the same time is inexpensive. However, performance Scroll-compressors usually does not exceed 40 kW.

The use of evaporative cooling devices in air conditioning systems in industrial buildings

Ensure air quality problem in a production environment, of course, belongs to the category of technology, because the focus is not so much to provide a comfortable environment, as aims to provide the necessary working conditions.

Without exaggeration we can say that the requirements for maintenance of the microclimate of the working area in the non-ferrous metallurgy enterprises are sufficiently “extreme” – this applies to the withdrawal of heat generation, and to ensure the necessary gas composition of the air.

It is known that the atmosphere in the working areas of non-ferrous metallurgy is characterized by relatively high concentrations of various gases, harmful effects on the health of staff and, consequently, complicating the implementation of their manufacturing operations.

The necessity of a large volume of gas emission assimilation determined the characteristics of the air in the production area, when its entire volume as possible is divided into separate work areas in which the local pumps are organized in combination with natural aeration space.

The problem of providing the desired microclimate in the crane cab is being addressed by at least two directions.

The first direction may include technical solutions that provide cab climate by supplying air from a central ventilation system through the movable duct. The disadvantages of this engineering solution is to limit the technological capabilities of the crane and decreased ventilation capacity due to deformation of the duct arising during operation.

The second direction is the use of self-contained air conditioning systems.

Today, we can confidently say that the main devices for cleaning the air from harmful gases are chemical filters, which are columns, equipped with a variety of nozzles, in which the contact between the aqueous solutions of reagent and purified air. Operation of these devices requires no special training, they are effective, reliable and easy to maintain.

However, these devices still have some drawbacks in terms of air quality in the limited space. Thus, during the absorption of harmful gases caused by direct contact of an aqueous solution of the reagent and air is carried adiabatic humidification. In fact, the moisture content has reached the resulting purified air is greater than the parameters of adiabatic humidification.

Ensuring the microclimate in the working areas of non-ferrous metals associated with the solution of a number of specific problems caused not only a high level of heat and water generation associated with certain technological processes, but also high gas content of the atmosphere. Used traditionally centralized ventilation methods require the use of large air exchange rates, which may not always be justified from an economic and environmental standpoints, and in some cases creates an unsolvable technical problem, which is fully applicable to the provision of the microclimate in the cabs of moving objects.

Known technical solutions in the field of air purification of harmful gases, based on the use of chemical methods, by themselves unable to provide the required sanitary standards of the air environment.

Therefore, the solution to this problem is possible based on the combined use of heat and humidity of air pre-processing to achieve a balance in the exchange of heat and moisture between the streams in chemical interaction

The choice of energy-efficient office buildings air conditioning systems

The microclimate of office space has a decisive influence on the individual performance of people, especially – temperature parameters of the environment in the room. Tired and not the location of the work is very often the consequences of poor indoor climate parameters, while, with significant economic consequences. With the construction of office buildings of class “A” requirements to a microclimate of comfort increased significantly, necessitating the installation of professional technically air conditioning systems.

One of the challenges of designing modern office building is to identify possible thermal regime at various measures of its software in the choice of economically viable option, maintains optimum air-heat treatment of all premises taking into account the coefficient of security.

Selection of the air conditioning system in the building must be carried out on the basis of carefully consider the terms of reference. The job has specific requirements for the microclimate (thermal comfort, a minimal amount of outside air and movement of air in the room to be ventilated, noise level and other parameters relevant to the purpose of each room context). It is necessary to take into account the desired life of the system, to assess the future costs of maintenance and operation. You also can not neglect the aesthetic requirements of the designer, the client and the user.

The architecture of the building and its layout have a direct influence on the choice of the air conditioning system. Along with the climatic characteristics, they are the source of data for determining the external heat gain, a significant proportion of which in the warm season of the solar radiation. Obviously, the constructive measures for sun protection are able to greatly reduce the load on the air conditioning system.

Why replacing your Heat Pumps to Latest one is better?

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You may installed Heat pump over a decade, and it may be in good condition after the lifespan by the manufacturer, but there are few more advantages you can have by replacing your equipment with Modern Heat Pumps. Innovative improvements on the design and operation of Heat Pumps offers you many good things.

If you’re located on Mississauga, Toronto, Burlington and Oakville, Kindly make a call to Air Track Inc. Our Experts will give you clear knowledge of it.

The Main Advantages of Modern Heat Pumps.

While compared current Heat Pumps to Older which more than a decade, the Modern Heat Pumps are named for its high efficiency, simply it will reduce your monthly electricity cost.
Very Safe Operation method, while comparing to old systems
Innovative Heating and Cooling exchange process will allows to achieve accurate temperature in a very short time.
Latest Heat Pumps are produce very low noise while operating, so your place is more comfortable and peaceful.
The Life span (50 Years) of Heat Pumps is very long and will give the perfect operating condition.

Preventive Maintenance Checklists for Small Refrigeration Units

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Across food and Medical industry Small refrigeration units are very popular and important. If unit is breakdown in an unexpected time, then you have to face profit loss along with the repair cost. Mostly the reason for failure is lack of proper maintenance.

To achieve the reliable and uninterrupted operation follow the following tips

Before starting the refrigeration unit make sure that the crankcase heater be energized at least eight hours minimize refrigerant migration foaming of the oils and the resulting immediate compressor failure.
Manually check out and calibrate the basic parts such as safety controls and expansion values
All electrical and mechanical equipment’s should be checked visually for any damages and wear outs.
Measure the oil levels in the unit and check out the quality. If oil is low in level or damaged in quality replace with new oil.
Check the motor magnetic starter and ensure the safe starting the unit
Visually inspect all electrical terminals and ensure it was on proper tight.
Examine the over load protection on the unit
Check and clean the condenser from dirt and dusts.
Check the system for the presence of moisture, if so install the filter dryers
Take preventive actions to avoid moisture

Winterize air conditioners for the winter

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Air conditioning can be damaged by cold weather, even if it is turned off. Low temperatures can be punished for minor mistakes when installing the air conditioner adversely affect the materials, parts and components of the device. For the conservation of the air conditioner can contact a service technician cents, or carry out the procedure themselves.

Usually action include three main stages:

Transfer the refrigerant in the outdoor unit to avoid its losses through loose connections outer Freon line
Blocking the possibility of including the air conditioner to avoid accidental start-up
Fencing outdoor unit when there is a risk of damage by ice or falling icicles

In preparation for winter air conditioning service technicians can be done and a professional cleaning air conditioning, it’s generally, it should be done at least once a year.

Disconnect the power supply
Clean the air conditioner with a damp and then a dry cloth (in those places where it can be done)
Clear filters from contamination
Be sure to dry the air conditioner (it will turn out, if you include the heating mode, if available, for 30-40 minutes, and then the ventilation mode for another half an hour, or just for a longer period including ventilation)
Carefully clean debris from all kinds indoor and outdoor unit
Clear off any snow or ice that may accumulate on the unit throughout the winter months.

Dry the air conditioner after a season of work before sending it in “hibernation”, be sure to do – or the winter inside the device might be mold, when you turn on the unpleasant odor in the Living space spread disease-causing bacteria, mold spores.

Surety Bonds 101 – Code for HVAC Contractors

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Surety bonds 101 refers to regulate the HVAC contractor follow the rules and regulations for the customers and for the municipality.

Holding it will confirm the contractor was responsible and the fulfillment of its obligations which reduces risk of customers. Bonded HVAC contractor will have extensive knowledge of design, implementation, handling, dispensing, cleaning support and security as per the regulations.

Guarantee agreement may be concluded to ensure the obligations which arise in the future.

Bond 101 is the credit provided surety to the customer, whenever a contractor fails to fulfill offered thins in contract the customer can able to file a claim on the business.

General requirements and regulations to obtain the license will vary state to state, and sometimes it’s not require by the state regulation.

On the basis of notification information the Contractor can apply with formal process, once you have gotten your bond, you will have to submit to the relevant authority to get issue your license for training and exam certificates.

Inverter Air Conditioning – Ideal for Electricity Saving

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Inverter air conditioning is expensive while comparing to non-Inverter air conditioning, but it gives significant advantages on power savings.

At least 30% – 50% cheaper to run as it consumes less power
Achieve desired temperature very quickly
Startups 30% faster
Much quieter
No temperature fluctuations, maximizing comfort level
No voltage peaks from compressor

Unlike conventional systems, Inverter compressor speed adapts to the needs of each moment, allowing only consume the energy.

Inbuilt Electronic device is sensitive and identify the temperature changes to supplies, equipment vary Inverter engine speed compressor to provide the power required. Thus drastically reducing temperature swings, keep getting in the range between -1 and + 1 ° C and enjoy greater environmental stability and comfort.

And so when they are about to reach the desired temperature, decrease the power equipment to avoid peak compressor starting. Thus the noise is reduced and consumption is always proportional.

No Inverter: On cold days without an air conditioner inverter function heats the room not quite right.

With Inverter: When producing 60% more heat than models constant speed, inverter air conditioners heat a room quickly even in the colder days.

Efficient use of power

No Inverter: The compressor is switched on and off according to temperature changes in the room. In other words, whenever the temperature fluctuates.

With Inverter: compressor speed and thus output power, is adapted to the room temperature. This efficient and linear temperature regulation at all times maintains a nice room.

Lower power consumption

No Inverter: An inverter air conditioner without function consumes approximately twice as much electricity. With this difference, not take long to get high bills.

With Inverter: An inverter air conditioner consumes half the electricity that a model without inverter function, so you get more welfare for much less money.

Need Periodic cleaning of HVAC systems

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Physical discomfort, irritation or dryness of the eyes, nose and throat, cough, nausea and respiratory and mental fatigue, memory disturbances, drowsiness, apathy, dizziness or stress problems are some of the health problems caused when people remain much time inside modern office buildings, due to contamination factors that may be specific to the same premises, stuffy or poorly functioning facilities air conditioning.

These factors may come from the characteristics of human activity, primarily as odors and smoke snuff, which causes discomfort, irritation and discomfort, as well as contaminants that may have the same outside air for ventilation.

Moreover, it seems that many new materials currently used in construction and furniture and decor, produce fumes that are slowly joining the indoor air, as in the case of paints, dyes, paints, adhesives, etc.

These air conditioners because of its enclosed spaces such as coils, condensate tanks, pipes Desagotes, etc., deprived of light at a stable temperature, moisture and dirt as nutrients can cause a process of putrefaction that becomes a broth ideal for the growth and proliferation of plant or animal organisms, consisting in pathogenic bacteria, fungi, yeast or virus culture.

Given this background, the World Health Organization (WHO) in 1982 has established that buildings with a percentage of more than 20% of people experiencing acute effects on health and wellbeing due to pollution levels, make a condition called Sick Building Syndrome (SBS).

It has been determined that dust is the main transporting agent of allergic substances, composed of a variety of organic and inorganic components, including fibers, mold spores, pollen grains, mold, insects and mites, produce symptoms ranging from mild irritation severe breathing problems that can arise even in chronic diseases.

Surge of all the above, the need Necessary for all building that has air conditioning installations involving air treatment, which by construction, extension tubes, activities that they develop and how many people occupy, to establish rules requiring periodic cleaning ducts, plus air conditioning.

As for the tasks could be considered Cleaning General Specifications for Commercial Air Conditioning Systems established by the NADCA (National Air Duct Cleaners Association) Standards.

Heart Pumping Workout : HVAC Compressor Maintenance?

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Compressor is the main heart beat of machine. While comparing compressor with human heart its beginning same one. Most similar one in both is circulating system like how heart circulates all functions in body. Likewise the compressor will handle the all functions in machine. If the compressor fails it will affect the whole machine to avoid this we should maintain properly.

It was found that most of the problems with the compressor is not related to the quality of the product, and is the result of lack of understanding of the principles of operation of air conditioning systems, improper maintenance and repair.

How to maintain the compressor

check the pressure and temperature of the refrigerant at the inlet and outlet of the compressor;
Check the temperature of inlet and outlet of the compressor and condenser tubes. High pressure pipes should be hot and dry;
Verifying that the condenser and the radiator fan. The appearance of moisture or frost on the part of the high pressure can hinder the flow of refrigerant;
Check the temperature difference between the inlet and outlet of the dryer. If the temperature difference is greater than 3 ° C, then the system is too high moisture content;
Check the refrigerant for Icing elements of the air conditioning system which can cause blockage on the system;
check tension and condition of the compressor belt;
Check for extraneous noise in the compressor, expansion valve, fan and air-conditioning system channels.