Help: Choosing an air conditioner
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Hello everyone: Our office is located in Keqi, Inner Mongolia, where the climate is quite cold, with temperatures dropping as low as minus 30 degrees Celsius. A new guest house has been built recently, and the temperature in its lobby is too low; therefore, air conditioning is needed. However, I’m not sure how to choose the right type of air conditioning system or how many units to install Could some expert please help answer this? Thank you! The specific parameters are as follows: The area of the reception hall is around 700 square meters ； Minimum outdoor temperature: minus 30 degrees Celsius ； Currently, hot water radiators are used for heating, but their effect is not significant ； The temperature is required to be 20 degrees Celsius above room temperature ；
With such low ambient temperatures, ordinary household small-capillary throttle air conditioners cannot meet your needs, as it is difficult for them to achieve the required performance. You can consult some ground-source heat pump manufacturers; they will be able to provide you with good advice. 700 square meters is not considered a large size for central air conditioning manufacturers, making it easy to select the appropriate model.
This post was last edited by fangbin468 on 2010-11-28 00:47. Hot water radiators heat the air through natural convection as the air warms up; the rate of temperature increase is too slow, so their effectiveness is not significant when the ambient temperature is low； It is best to use fan-coil units to deliver heated air, with a heating water source that has an appropriate temperature (preferably softened water that has been treated and filtered). Ensuring sufficient air exchange rates will help solve your heating problems in winter. If an air conditioner is installed, heating can only be achieved through the electric heater built into the air conditioner, with a heating capacity of no less than 70 KW.
Firstly, due to the low outdoor temperature, air-source heat pump systems cannot be used. Secondly, since you only have 700 square meters of space, using a ground-source heat pump is completely uneconomical; it’s not necessary. Third, use a fan-coil unit system with hot water flowing through the pipes. The hot air generated in this way keeps the room temperature at a moderate level. The fourth electric heating option isn’t worth it, since you already have hot water. My suggestion is as follows.
At the moment, since the basic renovation of the hotel is complete, the conditions are not suitable for installing heating air coils!
The Daikin VRV air conditioning system should be able to solve your problem, but the price seems to be high. You might want to try contacting the manufacturer for more information.
This post was last edited and replied to by li*ch1968 on 2010-12-1 at 17:50. Reply to 5# Xiaotaiye: Remove the radiators and install floor-mounted, exposed fan-coil units. If you’re interested, feel free to contact me, hehe. Installing fan coil units is likely to be the most cost-effective solution.