Category Archives: HVAC

Multi zone Industrial and Commercial Air conditioners

11
Aug

Industrial air conditioners are installed today in all enterprises, factories, manufacturing plants, business centers, shopping halls, sports complexes, large area (over 250 sq. M). Industrial air conditioners provide uninterrupted air conditioning, refrigeration and heating. Features industrial air conditioners – a complexity of use, energy efficiency, the cost of equipment. Industrial air conditioners have a resource 20 – 30 years of operation.

Multi zone system allows to condition several rooms and even the whole building. Each room is set the indoor unit and is supported by individual micro climate. Compared with the installation of individual air conditioners multi-zone air-conditioning system can save money, space, installation time. Multi-zone air conditioning units can be controlled centrally or individually. Designed for buildings containing a few (or a few dozen) areas with different requirements to the air.

Multi zone air conditioning system – profitable, convenient, safe

More than thirty years ago (1982) Daikin Company made a revolutionary breakthrough in the field of HVAC equipment by launching multi-zone air-conditioning system – VRV, which means “Variable refrigerant volume.” Since the company has patented, not only the system itself but also the abbreviation of VRV, as a trademark, other companies began to produce such equipment, began to use the name of the VRF «variable refrigerant flow.” However, in both cases we are talking about one and the same principle of operation of multi-zone air-conditioning.

Features multi-zone systems

  • Multi-zone air-conditioning system – it is the climate system inverter, which is installed in buildings with a large number of premises, providing a separate temperature control in the individual zones.
  • The multi zone system includes one outdoor unit and a lot of internal. The outdoor unit is connected to the internal pipework. Amount of internal blocks, drop their height relative to the outdoor unit, performance, pipe length are defined by the model and brand of the selected multi-zone air conditioning.
  • Multi zonal air conditioning systems use a modular design, so their installation are taken into account wishes of the customer in terms of the number of indoor units and their types (duct, cassette, floor, wall, ceiling).
  • Multi-zone air-conditioning system can be operated to cool the air in the same room at the same time, warming in the other, producing just enough cold and consuming as much energy as necessary to indoor units. Outdoor unit operating mode changes with the load of indoor units.
  • Control each indoor unit is carried out from the local console or centrally from the control center. Temperature parameters given in every room maintained at a constant level with high accuracy.
  • The performance of a number of multi-zone systems can serve the high-rise buildings.

Boilers: Various Types and Classification

23
May

 

In today’s energy work a variety of types of boilers. They can be classified by type of fuel, coolant type, accommodation type, level of mechanization. The specific type of boiler is selected depending on the goals and objectives, operating conditions and customer requirements.

  1. Fuel type
  • Gas: The advantage of this kind of boiler is that the gas – one of the most economical and environmentally friendly fuels. Gas boiler does not require complicated and cumbersome equipment fuel and slag removal, and can be fully automated.
  • Fuel oil: These boilers can run on waste oil, fuel oil, diesel oil. They quickly put into operation, do not require special permits, the connection negotiation, obtaining gas limits (as opposed to gas).
  • Solid: To the solid fuel concerns coal, peat, wood, pellets and briquettes from waste wood processing and agriculture. The advantage of this type of boiler is the availability and low price of fuel, but it requires the installation of fuel and ash handling systems.
  1. Coolant type
  • Steam:  In such a boiler heat carrier is steam, which is used mainly for manufacturing processes in industrial plants.
  • Water: This type of boiler is designed for heating and hot water supply of residential buildings, industrial and public facilities. The coolant is water, heated to +95 +115 ° C.
  • Combined: In these boilers are placed as steam and hot water boilers. Hot water is used to cover the load for hot water, heating and ventilation, and the steam is supplied to provide the technological needs of the enterprise.
  • Diathermic oil: In this boiler is used as a coolant in the high-temperature organic liquid, the temperature of which can reach +300 ° C.
  1. Accommodation type
  • Modular: This type of boiler is becoming increasingly popular in Russia in recent years, thanks to many advantages in comparison with stationary boilers: fastest time of installation and commissioning, factory-assembled modules, the ability to increase capacity by adding units, battery life, high efficiency, mobility. Depending on the placement of block-modular boiler can be detached, and attached, integrated, roof, basement.
  • Stationary: Stationary boilers are usually built when the required power exceeds 30 MW, or the construction of a modular boiler for some reason impossible. Stationary boilers distinguished by major building and construction (foundations, walls and partitions, roof). Installation of equipment on site is performed.
  1. The level of mechanization

Depending on the degree of mechanization / automation processes are the following types of boiler:

  • Hand: Small boilers can be equipped with boilers, in which the fuel supply is performed manually by operators. The fuel is supplied to the boiler room truck or in some cases from the outside through a loading hopper. The ash and slag from the ash hopper and are removed manually by the operator and exported outside the boiler room via trolley.
  • Mechanized: Modern boilers are equipped with solid mechanization, significantly facilitate the work boiler operator. Fuel supply by means of conveyors or skip hoists. Coal is pre-processed. The ash and slag may be removed by various methods – mechanical, hydraulic, pneumatic or a combination thereof.
  • Automated: This type of boiler assumes full automation and minimal presence of the human factor. Fully automated, as a rule, gas boiler.

 

Selection of Industrial Refrigeration Equipment

23
May

Choosing industrial refrigeration equipment for enterprises, primarily necessary to define what tasks you are going to put in front of him and try to take into account all the factors that will continue to affect the performance of the system cooling. Such options may be few, but you need to choose the most optimal.

To correctly determine the choice of refrigeration equipment must always take into account the system parameters such as:

  1. extreme heat
  2. the amount of heat in a time interval,
  3. Hydraulic resistance, as well as pre-agree on the heat dissipation and duplication systems.

As practice shows, in most cases, for a rational use of the equipment necessary to install more than one cooling system, and more. This is because the performance of the equipment at different times can be different: for example, a higher weekdays and weekends – lower. In such cases it is sufficient to install a small, which will increase the wear resistance of the cooling system and save on operating costs.

When choosing a pump to circulate the fluid, you will need to take into account the following factors: the diameter of the pipes, liquid lifting height and its distance from the energy source.

If the result of calculating the cost of refrigeration equipment coincides with the cost of downtime of the equipment, then we can consider the option of picking system spare equipment. In this case the two systems communicate with each other by the control unit, which in the case of an emergency or an unexpected stop of the main equipment will automatically turn spare.

Chiller Purchasing equipment with a powerful electric drive, you should consider that it has a limited number of starts per hour and running at the same time in the most unfavorable mode. Starting currents in this case is increased tenfold, and increases heat power cable is hundreds of times.

In contrast to the rated speed, increasing the current strength affects the torque, which increases at the start of dynamic impact on the shaft, bearings and couplings. Now, having seen the consequences of such a choice, you can imagine how many are able to serve in a similar refrigeration equipment operating conditions.

Surety Bonds 101 – Code for HVAC Contractors

13
Apr

 

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.

Advantages of Packaged Rooftop Units

30
Jan

 

  1. Wide range of rooftop HVAC units allows you to adapt too many different situations.
  2. If your requirements have been enlarged or extended, simply you can add few more units.
  3. In a commercial building it gives pleasant impression for any customers who visit.
  4. A smaller amount of area is enough to place rooftop units; other modes of hvac systems not as much.
  5. A packed systems includes integrated control and reduced expense and cost of additional external control technology
  6. Real-time monitoring provides system performance and savings rating
  7. Online tracking allows to maintain comfort between regular and peak hours of operation occupants
  8. Simple trouble shooting checks are enough to maintain the efficiency of roof top hvac units
  9. Life of a roof top units will come along for long period of time.
  10. When it comes to cost it saves much better

General Techniques to save HVAC Operational Costs in Industries

10
Jan

HVAC systems plays a vital role in industries, and it is a key element which determines the work place comfort, production quality as well as production speed. Moreover in most of industrial manufacturing companies the electric utility of HVAC systems will account for 40% of the total usage.

Here were giving techniques to have control over comfortable working environments utility costs of HVAC systems.

As Seasons Change Temperature Setting

Analyze the temperature data collected last year on various seasons such as spring, summer, autumn and winter and adjusts the heating or cooling in the building.

Lowering set points by just 1°C can potentially reduce your annual heating bill by up to 8%, so adjust to correct temperature required.

Shifting Operations Timings

Try shifting the production schedule, depending upon the local climate will Lower Energy Bills and Improve Comfort. If the outside air is significantly cooler and dryer than the returning air using that will provide some additional free cooling (Night Cooling works the best).

Integrating Lighting Controls with HVAC

Providing an efficient building requires both thermal and visual comfort, and this starts with lighting and HVAC controls. Because through scheduled operated lights will have control over the unwanted temperature increase caused by lights and can able to use only when required.

According to the EPA, the average building waste 30% of its energy due to inadequacies.