Question

2. A 2500-ft? house has an NLC = 10,000 Btu/F-HDD and 250 ftof south-facing double glazing. The passive solar energy system consists of a 12-inch thick vented Trombe wall with a selective wall surface and nighttime insulation. For the same house located in Albuquerque, Boston, Madison, Medford, Nashville, and Santa Maria, estimate how much auxiliary heat is needed and how much solar energy is captured in each case. Discuss the effectiveness of these passive solar features for the different climates and locations. Use the second-level (LCR) method.

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Answer 1

Given that A= 2500ft", NLC = 10000 BTU deg.day deg = I. R The passive. Solar features describe either. TWE3 87 TWE4. TWE4 That features double glazing will be Selected as moje in keeping with Passive features: LCR = NLC LCR= 40. BTU Asouth deg. day sth es Scanned with corisne

Using the passive type TWE4 and appendra 8A, the SSF for the vert Cities can be found. City SSF. F - HDD Albuquerqu 0.68 4292 Boston 0.34 5621 Albuquerque- SSF = 0.68 Ptotal = 10000 BTU 284292 Ptotal = 4:292x107 BTU Psolas = SSF (total solar = 2.999 x1o BTU Pausi = (1-SSP) totofi = (1-6.68] 4.292x107 = 1.373 407 BTU Boston SSE=0.34, Ptotof = 10000 BTU $ 5631 deg.dau Ototal = 5.621x1678 tundi Psolar = SSF[Ctotid)=0.345.621X107 = 1.90x18%BT0 Pmax = (1-SSF)] total = (1-0.34) (5.621-X 107) CS cOmax= 3.11x167BTU deg.day Scanned with