The performance of heat pump integrated with chilled water wall for air conditioning and domestic hot water

Abstract

Chilled water walls (CWWs) have been developed as a means of air cooling, dehumidifying, and air cleaning. Their operating performance is superior to that of a radiant cooling ceiling, which does not clean the air and reduce the dew water temperature. The CWW is connected to a compressor that chills the water, and the setup thus consumes much energy when operated all day. When integrated with a heat pump, the CWW can chill water on one side and heat water on the other side. Because the water temperature of the CWW is 10°C- 14°C, the heat pump can simultaneously generate chilled water at 7°C-10°C and hot water at 50°C. Additionally, indoor air pollutants are steadily removed by the thermal flow and flushed into the water tank by the water to clean the air. The dirty water can be cleaned using a filter and ultraviolet light. The heat pump integrated with a CWW supplies not only chilled water for air conditioning but also a domestic hot water supply, resulting in high energy efficiency due to multifunctionality.