Controlling The Comfort of Large Heat Load Rooms in The Tropical Region at Low Cost

Staff productivity becomes main concern in modern business. There are many requirements to maximise staff productivity in a company. Working in a comfortable room will result in not only good productivity, but also good quality of product. Among of criteria of room comfort are temperature, humidity, oxygen content and air flow. People commonly use air conditioner (AC) to make a room as a convenient place to work. However, it is not rare the room is very big and heat load is very high, such as a production building in industries in which may have many machineries installed and an open space office. Using an AC system to make a room comfortable may not a good option, because it will require high capital cost and very costly operational cost. In this report, other approaches, such as well-arranged fans, direct evaporative cooler device, underground evaporative cooler chamber, and ground cooling heat exchanger are explained. The techniques have been simulated, developed, and tested for open space offices and plant production buildings to make the rooms more convenient with minimum capital cost and operational cost. These approaches to some extend even also provide better comfort index as compared to AC, because they are not only able to lower down the temperature, but also supply fresh air and air flow. The main different between the technologies reported here and AC system, they need a room with well ventilated, and do not require chemical, such as refrigerant.