THERMAL ENERGY CONSERVATION WITH DRAPERIES AND A PLASTIC WINDOW LINER (COVERING, HEAT).

摘要

The contributions of draperies, a plastic window liner, and fabric properties to heat loss reduction were studied. Research questions were developed relative to the contribution of the following to heat loss reduction; properties of drapery fabrics, and the effectiveness of (1) a temporary plastic indoor window liner, and (2) combining draperies with a plastic window liner.;An environmental chamber was constructed which consisted of an "inside" section and an "outside" section, divided by a wall containing a window. The draperies were tested sealed (Velcro tape and a three-sided cornice) and unsealed, and with and without a plastic window liner.;Central tendencies, percentages, analysis of variance and Duncan s multiple range test were computed to determine if significant differences were present. Stepwise regression was used to identify the contribution of fabric properties to the variance in thermal resistance, the dependent variable. The effectiveness of each treatment was determined by comparing the percentage of heat loss reduction to the heat loss at the bare window.;Yarn count, thickness, density and air permeability accounted for 76% of the variability of the thermal resistance of the fabrics; mean values ranged from 0.95 ft('2) hr (DEGREES)F/Btu (Maliwatt) to 0.66 ft('2) hr (DEGREES)F/Btu (coated).;Four fabrics (Malimo, Maliwatt, glass and coated) for the window treatments were selected from 12 fabrics on the basis of thermal resistance, in combination with air permeability and thickness. Density, weight, yarn count, fabric construction and yarn construction were also determined.;The plastic window liner was the most effective in reducing heat loss (75%). The effectiveness of the sealed draperies used alone ranged from 57% to 75%; with the unsealed draperies alone the effectiveness ranged from 2% to 27%. All of the window treatments achieved some heat energy reduction, but only the sealed glass drapery was as effective as the plastic liner.