Too Hot at Home

Owners or tenant and mobiles or movable equipment

Behavioral Reactions

equipment

goal

cost

comments

can do

goal

comments

outside stores

prevent sun entry

low or medium

outside stores and most effective

close windows and stores during daylight

stop sunand hot air to get in

easy, free and essential to stop heating inner walls

reflecting stores pegged to glass windows

reflect sun

low

fast and easy if cannot with outside stores

open windows daynight

refresh inner air accumulated during daylight

fast air renewal allow to refresh inner wall heated during daylight

refresher and conditionning by evaporation

reduce inside air temperature

low to medium

air humidification of dry hot air allows to lower temperature

avoid hotest inner sour-ces when heating is not essential (cooking, iron-ing, lights, etcetera ...)

avoid air heating by heat escaped from machine, resistances

well insulated houses, inner heat production and air heating, may be important

humidification

locally refreshing of inside air

low

low flow, very local effect

Suspend wet blanket at the window

refresh air by evaporation

efficient as long as wetness renewed

green plants

contribution to refreshing

low

plant inside, and outside on balcony helps

Wet floor

refresh air by evaporation

efficient as long as wetness renewed

low electric consumption bulbs

reduce inside heat production

low

fluor-compact light produce up (o 5 less heat than traditional bulbs

Dry clothes naturally, inside rooms rather than drier

refresh air by evapo-ration,avoid heat production

lower electric consumption

efficient domestic machines

reduce inside heat production

medium

more efficient the device, less heat dissipated

light clothes, natural fibers, avoid antipersppirents

easy sweat effect

transpiration, perspiration, sweat are the mainhot prevention we have

refresh body by frequent showers, wet towels, wear slightly wet clothes

increase water evaporation from body contact

showers refresh if slight use of towels

lot of drinks and watery foods: fruit juice, vegetables, soups

balance water loss from sweat

lot of old people do not drink enough during hot

Fixed Equipment for Owners

outside stores, blind

prevent sun entry

medium

shutters are more efficient but blind let light entry

Walls insulation preferably since outside

prevent wall heating

high

insulation from outside protect from heat as from cold

Greening of walls around

protect walls from sun and create fresh local microcimate around habitation

low to medium

plants on walls, trees, green roof and floor refresh efficiently temperature around the house

refreshing wall equipment

refresh by radiating

medium to high

same wals can be used to refresh in summer as for heating during winter

Insulation of roof or ceilings

prevent roof heating

medium to high

prefer at first strong insulation

install inside wall with high inertia

slow heating of inside air

medium to high

help to balance low inertia of building

Factors Affecting Human Heat Exchange with Environment

clothing

under steady state the heat flow from the skin to clothing surface equals the heat flow from the clothing surface to the environment

R+C = (t

insulation I

evaporation resistance R; clothing area factor f

naked I

cotton shirt and trousers I

coverall, T-shirt underware, socks, shoes I

body

evaporative heat exchange takes place by the transfer of latent heat of evaporated sweat from the skin to the environment.

E

mean skin temperature t

posture; work task; effective radiation area, A

Mechanical efficiency

environment

air temperature t

air velocity v