WHAT IS HAP ?

Carrier's Hourly Analysis Program (HAP) is two programs in one. One part estimates design cooling and heating loads for commercial buildings to facilitate HVAC system design. The other part estimates annual energy use and operating costs so the performance of HVAC system design alternatives can be compared.

WHO USES HAP ?

Consulting engineers, design/build contractors, HVAC contractors, facility engineers and other professionals involved in the design and analysis of commercial building HVAC systems all use and benefit from HAP.

WHAT APPLICATIONS DOES IT COVER ?

DESIGN LOAD ANALYSIS

HAP v3 advances the art of HVAC load estimating by introducing the concept of system-based design.

System-based design is a technique which considers specific air-handling system features when performing load estimating and system sizing calculations. This is important because many systems have unique features which require special sizing procedures. For example, consider Single Zone CAV, Multizone, VAV, and Fan Powered Mixing Box systems. All contain different components and operate in different ways. To provide high quality system sizing data, the special features of each must be considered.

In the past, HVAC load estimating programs calculated room loads and airflow rates, and system airflow rates and coil loads without considering system specifics. This data is useful for general studies and for preliminary design when the system type is not known. HAP still offers these capabilities, but also provides the option of going a step further to tailor system sizing data to specific air handling designs and controls.

In HAP v3, general load estimating and system-based design start with the basics. Access to design weather data for hundreds of cities is at your fingertips. The ability to define specific wall, roof, and window constructions. Features for defining building design, layout, and operation in as much or as little detail as necessary. The process then continues by allowing the user to specify the type of system and controls used to deliver cooling and heating to the building. As much or as little detail as desired can be used. Sizing procedures then are tailored to the system choice to provide high-quality output listings for room loads and airflow rates, system coil loads and fan airflow rates, and component load details.

ENERGY ANALYSIS

HAP v3 puts the power of sophisticated 8760-hour energy simulations at your fingertips in a practical, user-friendly package.

Energy analysis is the technique of simulating building loads and HVAC equipment performance over the course of a year to estimate energy use and operating cost. By simulating performance for all 8760 hours in a year, HAP can provide the most accurate estimates of energy use and operating cost available. This is because HAP's simulations use actual hourly weather data and consider true hour-to-hour and day-to-day dynamic behavior of the building and its equipment. Considering these factors is crucial when comparing performance differences between alternate system designs, controls, or types of equipment. Other energy analysis methods that utilize simpler, less accurate average day or temperature bin methods cannot consider these factors.

In the past, 8760-hour simulation methods have tended to be difficult to use, and required advanced computer hardware. But by adapting a decade worth of experience in the HVAC software field, Carrier has created an 8760-hour energy analysis program that not only provides these powerful analysis features, but at the same time runs on standard computer hardware, and, most importantly, is easy to use. That program is HAP v3.

DESIGN LOAD FEATURES

Load Estimating Analysis

MISCELLANEOUS DESIGN FEATURES

ENERGY ANALYSIS FEATURES

Simulation and Modeling Features

Miscellaneous Features

HARDWARE REQUIREMENTS

WEATHER DATA AVAILABLE FOR DOWNLOAD

Weather data for use in the hourly analysis section of HAP is organized into regional sets, which are available for download. Regional weather data sets are listed below.