Ensure Good Ventilation to Avoid Health Hazards !!

Ventilation Control

All occupied buildings require a supply of outdoor air. Depending on outdoor conditions, the air may need to be heated or cooled before it is distributed into the occupied space. As outdoor air is drawn into the building, indoor air is exhausted or allowed to escape (passive relief), thus removing air contaminants. The term “HVAC system” is used to refer to the equipment that can provide heating, cooling, filtered outdoor air, and humidity control to maintain comfort conditions in a building. HVAC systems range in complexity from stand-alone units that serve individual rooms to large, centrally controlled systems serving multiple zones in a building. 

Some buildings use only natural ventilation or exhaust fans to remove odors and contaminants. In these buildings, thermal discomfort and unacceptable indoor air quality are particularly likely when occupants keep the windows closed because of extreme hot or cold temperatures.

In order to exhaust air from the building, make-up air from outdoors must be brought into the HVAC system to keep the building from being run under negative pressure. This make-up air is typically drawn in at the mixed air plenum as described earlier and distributed within the building. For exhaust systems to function properly, the control air must have a clear path to the area that is being exhausted. To prevent operating the building under negative pressures (and limit the amount of unconditioned air brought into the building by infiltration), the amount of make-up air drawn in at the air handler should always be slighter greater than the total amount of relief air, exhaust air, and air exfiltration through the building shell. Excess makeup air is generally relieved at an exhaust or relief outlet in the HVAC system, especially in air economizer systems. In addition to reducing the effects of unwanted infiltration, designing and operating a building at slightly positive or neutral pressures will reduce the rate of entry of soil gases when the systems are operating. 

The selection of a specific ventilator should be based on the following factors:

         

•  Job details such as the atmospheric hazard, the size of the confined space, etc
• Airflow required
• Airflow volume required at the end of the duct to control the hazards present; and Breeze to ensure worker comfort in the space.
• Duct friction loss to ensure adequate air volume reaches the end of the duct.

Aims of HVAC Control Systems:

• HVAC Control Systems are used for the following benfits:
• Lower energy cost.
•  Lower operations cost.
• Increase flexibility.
• Ensure quality building environment.

Esaplling Pvt. Ltd.

Email:enquiry@esaplling.com

Contact no:020-65366661

www.esaplling.com

HVAC- Annual Maintenance Contract...

Esaplling Pvt. Ltd is a key partner to deliver on your heating, ventilation, and air conditioning service needs, reducing unplanned downtime, increasing asset life and reliability, and ensuring productive environments. HVAC maintenance and predictive & diagnostic services, we help reduce risk, future costs and avoid breakdowns. We even provide a Remote Operations Center for monitoring security and systems on site. And, in the event of an emergency, our AC repair service experts provide swift response to get your facilities functioning again.
We Offer Maintenance Services  programs for:

• HVAC Units
• Chillers
• Rooftop Units (VRV / AHU)
• Commercial and Industrial Refrigeration system
• Cooling tower
• Pumps
• Air control system
• BMS
• Fan & Exhaust system

Client benefits:

• Minimum breakdowns
• Asset optimization through longer life span
• Less utility consumption
• Better air quality
• Personal comfort

We welcome the opportunity to work with you and we would be pleased to have long term relationship with customers in which trust and understanding are mutual.

Thanking You,

Esaplling Pvt. Ltd

enquiry@esaplling.com

contact us: 020-65366660

www.esaplling.com

Breathe Safe !!!

Indoor air pollution is a very real and dangerous thing because indoor air is far more concentrated with pollutants than outdoor air. Indoor air pollution has a far greater impact on developing countries than it does on developed ones because fuel, such as wood, charcoal and animal dung, is burned inside homes for cooking and heating. Rarely is there proper ventilation to allow the pollutants to escape, so residents of these homes end up breathing in carbon monoxide and other dangerous contaminants.

Indoor air pollutants from indoor fuel burning lead to serious human health problems, such as pneumonia, bronchitis, cancer, heart disease and asthma. And, since more than half of the population of developing nations has no other method for cooking and heating, it's not surprising that indoor air pollution from indoor fuel burning kills 1.6 million people each year.

Source Control

Usually the most effective way to improve indoor air quality is to eliminate individual sources of pollution by implementing  HVAC (Heating, ventilation, and air conditioning) system

Commonly HVAC systems control the ambient environment (temperature, humidity, air flow, and air filtering) and must be planned for and operated along with other data center components such as computing hardware, cabling, data storage, fire protection, physical security systems and power in IT industry, similarly for Hospital ICU, NICU, OT and in Pharma (Clean room) or Drugs manufacturing area or In chemical / hazardous places.

Learn More About HVAC (Heating, ventilation, and air conditioning) system

Click Here.

Variable Refrigerant Flow (VRF) Systems!!!

A Variable Refrigerant Flow (VRF) heating and air conditioning system is a specific type of HVAC system which utilizes one outdoor unit that connects to multiple indoor units.  These indoor units can be single systems; serving one space, or a ducted system; serving multiple spaces.  The indoor units are controlled individually by a room thermostat in a variable flow mode, while the outdoor unit provides the refrigerant. This provides for the heating and/or cooling of the individual interior space.  The outdoor units can be either air cooled or water cooled and the indoor units are connected to the outdoor unit via refrigerant piping.
A VRF system is an air conditioning/heating system where multiple indoor units can be connected, via refrigerant piping, to a single outdoor unit.  There are two types of systems:  Heat Pump and Heat Pump with Heat Recovery.  The heat pump system operates similarly to a standard heat pump where the outdoor unit is either in the heating or cooling mode and all indoor units are operating in the same (heating or cooling) mode.  The heat recovery heat pump system allows the individual space connected indoor units to be in either the heating or cooling mode whilst not requiring the outdoor unit selecting the mode.  This, is accomplished by piping refrigerant from the outdoor unit to a distribution box (circuit controller, branch selection box, etc.) and then routed using a second set of refrigerant pipes to each individual indoor unit.  This allows diversification in the overall cooling and/or heating load and greatly increases energy efficiency.
While a conventional HVAC system has outside ventilation air as part of the packaged system, VRF systems, although generally having outside air capability, usually require a dedicated outdoor air system (DOAS) to operate in conjunction with the VRF to provide ventilation air to the occupied spaces where the VRF provides the heating and cooling and the DOAS provides for the ventilation.  The DOAS only provides for the ventilation required by code thus the air side capacity of the system is not as great as a conventional all-air system which is providing ventilation air as well as enough air to be heated and cooled to satisfy the temperature control of the space.  Most VRF manufacturers do offer DOAS equipment which integrates into the control system for the VRF.

Advantages of VRF Systems

• Heat Recovery systems can be very energy efficient.
• VRF systems (per current code) can be exempt from the economizer code requirements.
• Minimal ceiling space or minimal space inside the building is required.
• Very effective in remodel projects.

We Offer Design, Installation, Operation and Maintenance Services...

Email Id: enquiry@esaplling.com
Contact no:020-65366660
www.esaplling.com

Ventilation Control !!!

Ensure Good Ventilation to Avoid Health Hazards !!!

All occupied buildings require a supply of outdoor air. Depending on outdoor conditions, the air may need to be heated or cooled before it is distributed into the occupied space. As outdoor air is drawn into the building, indoor air is exhausted or allowed to escape (passive relief), thus removing air contaminants. The term “HVAC system” is used to refer to the equipment that can provide heating, cooling, filtered outdoor air, and humidity control to maintain comfort conditions in a building. HVAC systems range in complexity from stand-alone units that serve individual rooms to large, centrally controlled systems serving multiple zones in a building. 

Some buildings use only natural ventilation or exhaust fans to remove odors and contaminants. In these buildings, thermal discomfort and unacceptable indoor air quality are particularly likely when occupants keep the windows closed because of extreme hot or cold temperatures.

In order to exhaust air from the building, make-up air from outdoors must be brought into the HVAC system to keep the building from being run under negative pressure. This make-up air is typically drawn in at the mixed air plenum as described earlier and distributed within the building. For exhaust systems to function properly, the control air must have a clear path to the area that is being exhausted. To prevent operating the building under negative pressures (and limit the amount of unconditioned air brought into the building by infiltration), the amount of make-up air drawn in at the air handler should always be slighter greater than the total amount of relief air, exhaust air, and air exfiltrating through the building shell. Excess makeup air is generally relieved at an exhaust or relief outlet in the HVAC system, especially in air economizer systems. In addition to reducing the effects of unwanted infiltration, designing and operating a building at slightly positive or neutral pressures will reduce the rate of entry of soil gases when the systems are operating. 

The selection of a specific ventilator should be based on the following factors:

• Job details such as the atmospheric hazard, the size of the confined space, etc…
• Airflow required
• Airflow volume required at the end of the duct to control the hazards present; and
• Breeze to ensure worker comfort in the space.
• Duct friction loss to ensure adequate air volume reaches the end of the duct.

Aims of HVAC Control Systems:

HVAC Control Systems are used for the following benfits:

1. Lower energy cost.
2. Lower operations cost.
3. Increase flexibility.
4. Ensure quality building environment.

Esaplling Pvt. Ltd.

Email:enquiry@esaplling.com

Contact no:020-65366661

www.esaplling.com

Refrigeration Cycle..!!!

Air conditioning and refrigeration are provided through the removal of heat. Heat can be removed through radiation, convection, or conduction. Refrigeration conduction media such as water, air, ice, and chemicals are referred to as refrigerants. A refrigerant is employed either in a heat pump system in which a compressor is used to drive thermodynamic refrigeration cycle, or in a free cooling system which uses pumps to circulate a cool refrigerant.

Refrigeration cycles is accomplished by continuously circulating, evaporating, and condensing a fixed supply of refrigerant in a closed system. Evaporation occurs at a low temperature and low pressure while condensation occurs at a high temperature and high pressure. Thus, it is possible to transfer heat from an area of low temperature to an area of high temperature.

The refrigeration cycle uses four essential elements to cool.

Compressor- Is the heart of the system. Just like your heart pumps blood through your body at a specific flow rate and pressure, the compressor pumps the refrigerant through the air conditioning system at a designed flow rate and pressure.

Condenser- The high temperature refrigerant passes into a condenser coil. As the vapor refrigerant travels through the coil, air from a fan passes over the coil to cool the vapor refrigerant. As the vapor cools it condenses and becomes a liquid, this is referred to as a “change of state”. This “change of state” from vapor to liquid is essential.

 Metering Device- Controls the flow of the liquid refrigerant to the next component which is the evaporator. This is a dividing point between the high pressure and low pressure sides of the system. As this high pressure liquid is passing through the metering device and into the evaporator the pressure drops.

Evaporator- After leaving the metering device the refrigerant immediately enters a coil called the evaporator. This coil or evaporator has a fan blowing across it. As the refrigerant enters the coil at a lower pressure it begins to bubble and boil and “change state” back to a vapor. During this process of changing state, energy in the form of heat is being removed from the air passing over the coil and is being absorbed by the refrigerant. The heat that was in the air is transferred into the refrigerant. Since heat was removed from the air blowing over the evaporator coil, the air leaving the evaporator coil is cold. You see that an air conditioner makes cold air by having the heat that is in the air absorbed into the refrigerant.

The Cycle Of Cooling

email id: enquiry@esaplling.com
contact us: 020-65366660

www.esaplling.com

REDEFINING AIR!!!