tabelas de Mahoney, aula CECONS 3

1. Métodos de avaliação
bioclimática
E. Krüger
PPGEC/UTFPR

2. Métodos adotados na primeira
versão do Zoneamento
Bioclimático Brasileiro
• Tabelas de Mahoney
• Diagrama Bioclimático de Givoni

3. Tabelas de Mahoney
Método criado na década de 1970 por Carl Mahoney (AA
School, London) para desenho bioclimático
• Etapa inicial: obter dados climáticos locais
• Anotação dos dados em planilhas (Tabelas de
Mahoney)
• Geração de recomendações gerais para projeto
Obs: método relativamente simples e que demanda pouco tempo para
ser utilizado

4. Tabelas de Mahoney
Wikipedia:
The tables use readily available climate data and simple calculations to give design guidelines, in a
manner similar to a spreadsheet, as opposed to detailed thermal analysis or simulation. There are six
tables; four are used for entering climatic data, for comparison with the requirements for thermal
comfort; and two for reading off appropriate design criteria. A rough outline of the table usage is:
 Air Temperatures. The max, min, and mean temperatures for each month are entered into this table.
 Humidity, Precipitation, and Wind. The max, min, and mean figures for each month are entered into this
table, and the conditions for each month classified into a humidity group.
 Comparison of Comfort Conditions and Climate. The desired max/min temperatures are entered, and
compared to the climatic values from table 1. A note is made if the conditions create heat stress or cold
stress (i.e. the building will be too hot or cold).
 Indicators (of humid or arid conditions). Rules are provided for combining the stress (table 3) and
humidity groups (table 2) to check a box classifying the humidity and aridity for each month. For each of
six possible indicators, the number of months where that indicator was checked are added up, giving a
yearly total.
 Schematic Design Recommendations. The yearly totals in table 4 correspond to rows in this table,
listing schematic design recommendations, e.g. 'buildings oriented on east-west axis to reduce sun
exposure', 'medium sized openings, 20%-40% of wall area'.
 Design Development Recommendations. Again the yearly totals from table 4 are used to read off
recommendations, e.g. 'roofs should be high-mass and well insulated'.

5. Tabelas de Mahoney
Adaptadas por
M Roriz 1987

6. Carta de Givoni 35
Ano Climático (TRY e Normais Climatológicas)
30
30
ZONAS:
1. Conforto
2. Ventilacao 25
25
3. Resfriamento Evaporativo
5. Ar Condicionado
20
6. Umidificação 5
2
7. Massa Térmica/ Aquecimento Solar 20
W [ g /k g ]
8. Aquecimento Solar Passivo
]
15
C
[°
9. Aquecimento Artificial 15
11.Vent./ Massa/ Resf. Evap. U
B
T
12.Massa/ Resf. Evap. 10 1 11 10
5 12
0 5
-5 9 8 7
-1 0
-2 0 -1 5 3
6
0
-2 0 -1 5 -1 0 -5 0 5 10 15 20 25 30 35 40 45 50
U F S C - E C V - L a b E E E - N P C
T B S [°C ]
Dados do TRY sobre carta psicrométrica (diagrama
bioclimático) – software Analysis Bio

7. Ano Climático (TRY e Normais Climatológicas)
Dados das Normais Climatológicas sobre carta
psicrométrica (diagrama bioclimático)
Fonte INMET para download de Normais Climatológicas:
http://www.inmet.gov.br/