Analyze the WLHP system in worked example 13.13 including a water storage tank of volume 2m3 , if each time period is 6 hours.   Example 13.13 An office building has the following occupancy schedule...

Analyze the WLHP system in worked example 13.13 including a water storage tank of volume 2m3 , if each time period is 6 hours.

Example 13.13

An office building has the following occupancy schedule during a typical week. (i) From Monday to Friday it is fully occupied from 7 a.m. to 7 p.m. (12 hours) and unoccupied during the rest of the day. (ii) It is unoccupied on Saturday and Sunday. The UA-value for the building is 1.75 kW°Cí1 . The internal heat gains and the indoor  temperatures during the occupied and unoccupied periods are respectively, 14.8 kW, 22°C and 1.3 kW, 18°C. The building is heated by a fuel-fired furnace of capacity of 80 kW and efficiency 88%. Assume a degradation coefficient of 0.25 due to cycling of the furnace. The annual bin data for the three consecutive 8-hour periods, obtained from Ref. [3] are given in Table 13.13.1. Estimate the annual heating loads and heating energy inputs to the furnace for the occupied and unoccupied periods.