HVAC air conditioning system

HVAC air conditioning system for building a house รับสร้างบ้าน  It consists of a heating, ventilation system and cooling. It controls the temperature, humidity, air filtration as well as controls the distribution of air movement in the entire building.

• hot and cold air which is distributed by air, water, or both.
• The preheater (warm air) heats the outdoor air below 32 °F (0 °C) to a slightly higher temperature. To prevent freezing of various parts of the system
• Blowers or blowers. Serves to blow air to different parts. In the building of the HVAC system
• The humidifier delivers steam to the air duct system to the building. to control and maintain an appropriate level of air humidity.
• The chiller operates using electricity, hot steam or gas. It sends cold water to the cool air chamber for cooling. and pumping the hot water of the condenser to the aeration tower to cool off.
• The boiler produces hot water or hot steam. for heating in case of needing hot air the boiler has a fuel type (gas or oil) by burning air Also, the combustion oil boiler requires a storage tank on site, while the electric boiler is easier to use and easier to maintain. No air inlet pipes and chimneys are required. But may have to consider the cost of electricity before choosing In the case of hot water or steam, it can be distributed from the central part of the city to the utilities. The building’s boiler is therefore not required.
• The chimney vents smoke from the combustion of fuel.
• An aerator or water tower is a structure usually placed on a roof deck. Serves to absorb heat with water and uses a fan to cool the water out of the water again. to be circulated for use in new cooling The number of aeration towers or water towers depends on the cooling load on the building.
• Return air is sucked back from the indoor air. to the cooling unit to circulate cold air back to the indoor.
• Air volume control valve located in the air duct.
• Exhaust air is sucked out.
• Good air from outside is sucked in.
• The air filter serves to filter impurities from the outside air.
• Problems with the quality of indoor air that house building company บริษัทรับสร้างบ้าน More than half of these cases come from inadequate filtration and ventilation systems. However, building law specifies the size of ventilation that must be provided to the building’s living space in cubic feet per minute per person or in volume per hour, the ASHRAE Institute recommends a typical ventilation volume of 15 to 20 f³/min (0.42 to 0.57 m³/min) per person.
• The cooling air chamber is equipped with a fan. Filters and components required for filtration and distribution of conditioned air
• In the case of a single fan chamber, the fan chamber contains a cooling blower inside. Acts as a wind target to different parts of large buildings. In the case of multiple fan rooms the fan should be positioned to reduce the distance to blow air to the parts to be as short as possible.

Air conditioning system for the whole building using wind.

• Single air duct system with constant air volume. (Constant-Air Volume: CAV system) will distribute the air that has been adjusted to the temperature along the low-speed air ducts.
• In the case of a single aggregation area, a single aggregation thermostat is used to control the temperature.
• Multi-area temperature control. It uses air ducts to separate several pipes from the blower chamber to deliver air to different areas.
• Single air duct system with variable air volume (Variable-Air-Volume: VAV System) will use the air volume control valve at the outlet of the air duct. To control the amount of wind according to the temperature set in each area of ​​the building.
• The dual air duct system uses separate hot air and cold air ducts. It mixes hot and cold air in an air mixing device box containing a thermostat inside. It controls the opening of the air volume control valve.
• Air Mixing Equipment Box It will determine the ratio of hot air and cold air mixture to fit the requirements set in each area of ​​the building.
• Dual duct systems often use high-speed ducts of 2,400 ft/min (730 m/min) or more to reduce duct size and installation space.
• The warm air system adjusts the air temperature at the outlet of the air duct to a value close to the desired value especially with areas that have changed from the existing ones The air preheater generates approximately 55°F (12 °C) from an electric heating coil or hot water pipe.

Water-based air conditioning system throughout the building

• Water-based air conditioning system will send hot and cold water through the pipes to be supplied to the evaporator unit at the area that needs air conditioning in the room.
• A two-pipe system uses one hot or cold water pipe and another pipe returning the water to the boiler or chiller.
• Inside the evaporator is an air filter and a centrifugal fan. to suck air into the coil to adjust the temperature of the air before it is released back into the room.
• A four-pipe system uses one cold water circuit and one hot water circuit to deliver hot and cold water to different areas at the same time, where the ventilation from the area will be through openings or allow air to penetrate through the walls or a separate ventilation duct system.
• Independent wall ventilation system.