Skip to main content

Table 3 Summary of results of cases where permeance and infiltration are changed

From: RH simulation model for canvas paintings protected by an aluminium backplate and an additional hygroscopic layer

Case Permeance (vapour) Infiltration rate RH cycle delays to the ideal values at the void layers temperatures RH interval (max/min) % in 1st cycle
kg m−2 s−1 Pa−1 nVol/h Canvas Cotton Aluminium Canvas Cotton Aluminium
1 1.00E−12 0.4 0   0 60/59   72/56
1.A 1.00E−09 0.4 1/2   0 60/53   71/50
1.B 1.00E−12 10 1/4   0 60/58   72/55
2 1.00E−12 0.4 1/2 1/4 0 65/52 59/58 60/56
2.A.1 1.00E−11 0.4 7/16 1/4 1/8 65/52 58/60 57/61
2.A.2 1.00E−10 0.4 7/16 1/4 1/8 65/52 58/58.5 56.5/60.5
2.A.3 1.00E−09 0.4 7/16 1/4 1/8 64/50 60/54 61/53
2.B 1.00E−12 10 7/16 1/4 1/16 64/50.5 59/55.5 60/54.5
3 1.00E−12 0.4 3/16   7/16 61/59   72/50
3.A.1 1.00E−11 0.4 3/16   5/16 62/59   73/50
3.A.2 1.00E−10 0.4 3/16   5/16 65/68   74/52
3.A.3 1.00E−09 0.4 2/16   17/32 74/46   72/52
3.B 1.00E−12 10 3/16   5/16 70/49   72/50
4 1.00E−12 0.4 1/4 1/4 1/2 66/61.5 66/61.5 75/54
4.A 1.00E−09 0.4 1/8 1/8 3/8 67/52 67/52 70/53
4.B 1.00E−12 10 3/16 3/16 7/16 65/57 65/57 72/52
  1. The outputs are cycle delays in relation to an ideal case (maximum RH and minimum T coincide) and RH range at different layers. Cases indicated a N, N.A and N.B, where N denotes the original Cases 1–4, A denotes change in permeance, and B denotes change in infiltration rate