The annual gas demand forecasting in air-source gas-fired absorption heat pumps

Piotr Langowski,Piotr Jadwiszczak,Jakub Doroszkiewicz,B Kaźmierczak,P Jadwiszczak,K Piekarska,M Kutyłowska

doi:10.1051/e3sconf/20184400090

Abstract

The forecasting of fuel demand is required for decision-making and management of heating systems. A simple methodology of gas demand forecasting in heating systems based on air-source gas-fired absorption heat pumps (GAHP) was presented and evaluated on real gas consumption data. The methodology was developed by Gazuno, based on experience and long-term measurements in real GAHP heating systems in Polish climate conditions. Methodology takes into account main factors influencing the gas consumption: the variability of heat pumps’ gas utilization efficiency (GUE), the operation conditions and the operation time. In air-source gas-fired heat pump technology the GUE changes in operation time according to the external air temperature and heating system temperature. The presented simple methodology is dedicated for decision-making on early design stage, to simple assessment of future gas demand in the GAHP heating systems.

Highlights

The selection of heat source technology is one of the most long-term decision need to be made in every design of new, modernized or replaced heating system
The GAHP manufacturer Gazuno has developed a simple method of annual gas demand forecasting in heating systems based on air-source gas-fired absorption heat pumps in Polish climate conditions
Based on technical experience and long-term measurements the simple methodology of gas demand forecasting in GAHP heating systems was developed by Gazuno

Summary

Introduction

The selection of heat source technology is one of the most long-term decision need to be made in every design of new, modernized or replaced heating system. The air-source gas-fired absorption heat pumps, as a renewable heating solution, use natural gas or LPG at a high efficiency to converting energy from the surrounding air into high grade heat for space heating and domestic hot water (DHW). Air-source gas-fired absorption heat pumps use gas as a driving energy and external air as a heat source. In all air-source heat pump technologies the efficiency and thermal capacity fall with the decrease of external air temperature and with increase of heating system temperature. These variability must be taken into account in technical design and in gas demand forecasting in GAHP heating systems.

Gazuno GAHP-A

Methodology of annual gas demand forecasting

Design temperature

Findings

Conclusions