| Title |
An Experimental Study of the control Performance of Radiant Floor Heating Systems |
| Abstract |
For the optimum control of radiant floor heating systems, it is generally understood that the supply water temperature should be varied in accordance with outdoor temperature due to the time-lag between thermostat demand and heat delivery to the space (ASHRAE 1987). MacCluer(1989) proposed the concept of proportional flux-modulation and claimed that the rate of heat entering the floor slab must be controlled, not the temperature. To evaluate these issues, a comparative study of temperature-modulation with outdoor reset control and proportional flux-modulation has been conducted through physical experiment in a laboratory setting. The test results show that flux-modulation favorably compares with temperature-modulation approach by maintaining stable indoor temperature around the setpoint and by demonstrating immediate response to any internal load disturbance. |