Survey on HVAC Energy Consumption Status and Indoor Environment Quality Test for Hotel Buildings in Guangzhou

Abstract

This paper investigates and analyzes energy consumption of thirteen hotel buildings in Guangzhou and tests the indoor temperature, relative humidity, internal illuminance, and carbon dioxide density. Be difference from other public buildings, hotel buildings in Guangzhou have both air-conditioning system in summer and heating system in winter. Hot water system is running continuously all year round. Through survey, that hotel building’s cooling and heating sources scheme consist of water chillers + air-source heat pumps, water chillers + oil-fired (gas-fired) boilers, water chillers + oil-fired (gas-fired) boilers + air-source heat pumps, and water chillers +direct-fired LiBr absorption refrigeration machine + water source heat pump. By statistics, the power consumption per unit area is from 87.27 to 229.80 kWh/(m2.a), and the HVAC power consumption per unit area is from 21.25 to 119.84 kWh/(m2.a). HVAC system consumes about from 16.0 to 71.6 % power. A comprehensive energy consumption of the 13 hotel buildings in Guangzhou is obtained by converting consumption of oil, gas and power to coal equivalent. The comprehensive energy consumption for unit area is from 19.74 to 65.67 kgce/(m2.a), and the HVAC energy consumption per unit area is from 7.58 to 47.27 kgce/(m2.a). HVAC system consumes about from 38.1 to 84.4 % comprehensive energy. In the end, analyzes the causes for energy consumption difference. Puts forward some problems existed in HVAC system and indoor environment quality and some approaches for improving energy utilization.