Room Sensible Heat Ratio

The sensible heat ratio shr is used to describe the ratio of sensible heat load to total heat load and can be expressed as.

Room sensible heat ratio.

Rshr room sensible load room total load. The room sensible heat factor rshf expresses the ratio between sensible heat load and total heat load in a room. The dehumidification effectiveness of air conditioning equipment is commonly characterized by the sensible heat ratio shr which is the ratio of the sensible cooling capacity to. Click here to get access to my free daily insights course.

The supply air having conditions given by any point on this line will satisfy requirements of the room with quantity of air supplied different for different points. Sensible heat is the heat which increases or decreases the temperature of the body. This ratio is expressed in the following formula. Room sensible heat factor.

Sensible heat factor is the ratio of sensible heat and total heat. Q sr sensible heat load in room kw btu hr. Shr q s q t q s q s q l 1 where. Shr sensible heat ratio ratio of sensible heat load to total heat load q s sensible heat load kw btu hr.

Rth rsh rsh rlh rsh rshf equation 9 2. So a system that has an shr 0f 0 70 and 30 000 total btus of capacity at a set of conditions would produce 21 000 btus of sensible cooling and 9 000 btus of latent removal. Starting to study for the mechanical hvac refrigeration pe exam. When you set your thermostat to 75 degrees it will actually feel like 75 degrees.

Latent heat is the heat which increases the specific humidity without increasing or decreasing the temperature of the body. Rshf room sensible heat factor. It can be expressed as. Sensible cooling and it reduces the moisture content of the air latent cooling by causing a portion of the water vapor in the air to condense into liquid water.

The supply air to a conditioned space must have the capacity to offset simultaneously both the room. Rshf c p t r t i h r h i 2. If for example a room had a total heat load of 2 500 btuh and 1 800 btuh sensible heat the rshr would be 0 72. Is the ratio of room sensible heat to the summation of room sensible heat and room latent heat.

Total heat is the sum of sensible heat and latent heat. Q tr total heat load in room kw btu hr 1 can be modified to. If that s in line with the actual sensible latent heat ratio in your home then you should be in good shape. Room sensible heat ratio rshr is the ratio of sensible heat to total heat including latent for a room or zone.

It is defined as the ratio of room sensible heat to room total heat.