Progetto SIMEA - Automatica - Università degli Studi di Padova

SIMEA Stato dell’arte energetica degli edifici
1.2.30. HAP
58
Doc.No 20100610.SIMEA.MR.03
Versione 1
A versatile system design tool and an energy simulation tool
in one package, Carrieris Hourly Analysis Program (HAP)
provides the ease of use of a Windows-based graphical user
interface and the computing power of modern 32-bit software.
HAPs design module uses a system-based approach to
HVAC load estimating. This approach tailors sizing procedures
and results to the specific type of system being considered. Central
AHUs, packaged rooftop units, split systems, fan coils, water
source heat pumps and PTACs can easily be sized, as can CAV,
VAV and multiple-zone systems. Calculation rigor and integrity
are provided by the ASHRAE Transfer Function Method for calculating building heat flow.
HAPs energy analysis module performs an hour-by-hour simulation of building loads and equipment
operation for all 8,760 hours in a year. This approach provides superior accuracy versus the reduced hour-byhour
method used by other software programs on the market.
This is because a full hour-by-hour calculation considers the unique weather and operating schedules
for each day of the year, rather than looking only at average or typical days each month. Such accuracy is
crucial when analyzing design alternatives, energy conservation methods and details of off-design and partload
performance for equipment. HAP uses TMY weather and the ASHRAE Transfer Function to calculate
dynamic heat flow.
Many types of air handling systems, packaged equipment and central plant equipment can be
simulated.
HAP uses six calculation engines to perform its work. The Loads engine uses the ASHRAE Transfer
Function Method to analyze dynamic heat transfer in the building, producing space cooling and heating
loads. The Systems engine simulates the thermo mechanical operation of air side systems.
The Sizing engine integrates with both the Loads and Systems engines to determine required sizes for
diffusers, air terminals, fans, coils and humidifiers. The Plant engine simulates the operation of chilled water
and hot water plants. The Building engine collects energy and fuel consumption data from the System and
Plant calculations and combines it with utility rate specifications to produce energy meter consumption totals
and energy costs. Finally, a Life-cycle engine in a separate, but integrated program combines energy costs
from HAP with purchase, installation and maintenance costs to derive life-cycle costs. HAP is suitable for a
wide range of new design and retrofit applications.
It provides extensive features for configuring and controlling air-side HVAC systems and terminal
equipment. Part-load performance models are provided for split DX units, packaged DX units, heat pumps,
chillers and cooling towers. Hydronic loops can be simulated with primary-only and primary/secondary
configurations, using constant speed or variable speed pumps. Energy costs can be calculated with simple or
complex utility rates, the latter including energy and demand charges, time of day and year pricing, and
demand determination clauses such as ratchets.
1.2.30.1. Expertise Required
General knowledge of HVAC engineering principles and MS Windows software applications.
1.2.30.2. Users
Approx. 5000 worldwide (single & LAN).