# 冷负荷经验法则

Table of Contents

SHR 0.75–0.93。

SHR0。 75–0.90

SHR 0.75–0.90

SHR 0.80–0.95

SHR 0.80–0.95

SHR 0.65–0.80

SHR 0.60–0.70

SHR 0.65–0.80

SHR 0.75–0.85

SHR 0.75–0.85

SHR 0.80–0.95

# 公寓（有效、一室、两室）

SHR 0.80–0.95

# 汽车旅馆和酒店公共空间

SHR 0.75–0.90

# 汽车旅馆和酒店客房、宿舍

SHR 0.80–0.95

SHR 0.65–0.80

SHR 0.65–0.80

SHR 0.80–0.90

SHR 0.65–0.90

SHR 0.65–0.90

SHR 0.65–0.85

SHR 0.65–0.85

# 监狱

SHR 0.80–0.95

SHR 0.65–0.75

SHR 0.65–0.75

# 所有空间

## FREQUENTLY ASKED QUESTIONS

What is the general cooling load rule of thumb for offices in terms of tons per square foot?
The general cooling load rule of thumb for offices is 300-400 square feet per ton, with a range of 230-520 square feet per ton. This means that for every ton of cooling capacity, you would need to cool an area of approximately 300-400 square feet.
How does the total heat gain in an office space impact the cooling load calculation?

The total heat gain in an office space has a significant impact on the cooling load calculation. A general rule of thumb is to assume a total heat gain of 30-40 Btuh per square foot, with a range of 23-52 Btuh per square foot. This includes heat gains from occupants, lighting, equipment, and infiltration.

What is the recommended sensible heat ratio (SHR) for office spaces?

The recommended sensible heat ratio (SHR) for office spaces is between 0.75 and 0.93. SHR is the ratio of sensible heat to total heat, and it affects the cooling coil design and the overall system performance.

How does the perimeter of an office space impact the cooling load calculation?

The perimeter of an office space plays a significant role in the cooling load calculation, as it affects the heat gain through walls and windows. A general rule of thumb is to assume a higher cooling load for perimeter zones compared to interior zones, due to the increased heat gain from the exterior.

Can these cooling load rules of thumb be applied to other types of buildings, such as restaurants or hospitals?

While these cooling load rules of thumb are specifically mentioned for offices, similar rules of thumb can be applied to other types of buildings, such as restaurants, hospitals, or schools. However, the specific values and ranges may vary depending on the building type, occupancy, and equipment loads.

What are some limitations of using cooling load rules of thumb in HVAC design?

While cooling load rules of thumb can provide a rough estimate of the cooling load, they have limitations. They do not take into account specific building characteristics, such as window orientation, shading, and insulation, which can significantly impact the cooling load. Additionally, they do not account for variations in occupancy, equipment, and lighting schedules. Therefore, it is recommended to use more detailed calculation methods, such as ASHRAE’s Cooling Load Calculation (CLC) method, for accurate HVAC design.