GB 50189-2015 Design standard for energy efficiency of public buildings

General Provisions

• 第 1.0.1 条This standard is formulated to implement relevant national laws, regulations, and policies, improve the indoo…
• 第 1.0.2 条This standard applies to the energy efficient design of newly built, renovated, and expanded public buildings…
• 第 1.0.3 条Energy efficient design for public buildings should follow the principle of prioritizing passive energy savin…
• 第 1.0.4 条When the hotel building height exceeds 150 m , its energy efficient design shall undergo a special demonstrat…
• 第 1.0.5 条Energy efficient design for hotel buildings should take into account local climate conditions and building fu…
• 第 1.0.6 条Energy efficient design for hotel buildings should incorporate a whole building life cycle energy saving phil…

Terminology

• 第 2.0.1 条Public buildings : Buildings, including hotel buildings, that are provided for people to carry out various pu…
• 第 2.0.2 条Shape coefficient : The ratio of the external surface area of a building in contact with the outdoor air to t…
• 第 2.0.3 条Window to wall area ratio : The ratio of the window opening area to the room facade unit area (i.e., the area…
• 第 2.0.4 条Trade off judgment of building envelope thermal performance : When parameters such as the hotel building's sh…
• 第 2.0.5 条Transparent curtain wall : A curtain wall through which visible light can directly transmit into the interior…
• 第 2.0.6 条Visible light transmittance : the ratio of the visible light flux transmitted through a transparent material …
• 第 2.0.7 条Shading coefficient : Under identical conditions, the ratio of solar radiant heat gain through an external wi…
• 第 2.0.8 条Integrated Part Load Value (IPLV) : An energy efficiency indicator used to evaluate the performance of air co…
• 第 2.0.9 条Energy Efficiency Ratio (EER) : The ratio of the cooling capacity (or heating capacity) provided by air condi…
• 第 2.0.10 条Fresh air volume : The amount of fresh air supplied to hotel guest rooms, meeting rooms, lobbies and other ar…

Building and envelope

• 第 3.2.1 条Building classification and shape coefficient : The shape coefficient of a hotel building shall not exceed 0.…
• 第 3.2.2 条Window to wall area ratio : The window to wall area ratio for each orientation shall comply with: north ≤0.30…
• 第 3.2.3 条Roof transparent area : The transparent area of the roof shall not exceed 20% of the total roof area.
• 第 3.3.1 条Envelope thermal performance limits (Severe Cold Zone A/B) : Roof heat transfer coefficient K ≤ 0.35 W/(m²·K)…
• 第 3.3.2 条Envelope thermal performance limits (Severe Cold Zone C) : Roof K≤0.40 W/(m²·K); exterior wall K≤0.50 W/(m²·K…
• 第 3.3.3 条Thermal performance limits of building envelope (cold zone) : Roof K≤0.45 W/(m²·K); exterior wall (including …
• 第 3.3.4 条Envelope thermal performance limits (Hot Summer and Cold Winter zone) : Roof K≤0.60 W/(m²·K); exterior wall (…
• 第 3.3.5 条Envelope thermal performance limits (hot summer and warm winter zone) : Roof K≤0.80 W/(m²·K); exterior wall (…
• 第 3.3.6 条Thermal performance limits for exterior windows (including transparent curtain walls) (by climate zone) : Bas…
• 第 3.3.7 条Thermal performance of transparent roof sections : The heat transfer coefficient K and solar heat gain coeffi…
• 第 3.3.8 条Ground thermal resistance : In severe cold and cold regions, the thermal resistance R of the ground around th…
• 第 3.4.1 条Exterior window air tightness : The air tightness grade of exterior windows and open balcony doors shall not …
• 第 3.5.1 条Shading measures : For hotel buildings in hot summer and cold winter, hot summer and warm winter, and cold (p…
• 第 3.5.2 条Roof greening and ventilation : Measures such as roof greening and elevated ventilated roofs are encouraged t…
• 第 3.3.1 条1. In the above clauses, parameters such as the heat transfer coefficient K value, solar heat gain coefficien…
• 第 3.2.3 条2. For tall spaces such as lobbies and atriums in hotel buildings, the area of the transparent roof portion a…
• 第 3.4 条3. When a hotel building's shape coefficient, window to wall area ratio, or thermal performance of the buildi…

Architecture and building envelope

• 第 3.4.2 条Air tightness of transparent curtain walls : The air tightness grade of transparent curtain walls shall not b…

Heating, ventilation and air conditioning

• 第 4.2.2 条The energy efficiency of the cooling and heating source units of the hotel building's air conditioning system…
• 第 4.2.5 条When using vapor compression cycle chillers (heat pumps), their Integrated Part Load Value (IPLV) shall not b…
• 第 4.2.8 条The rated thermal efficiency of boilers shall not be lower than the provisions of Table 4.2.8: thermal effici…
• 第 4.2.10 条The energy efficiency ratio (ER) of the chilled and hot water distribution systems of air conditioning system…
• 第 4.2.11 条The specific fan power per unit air volume (Ws) of fans in air conditioning duct systems shall not exceed the…
• 第 4.2.13 条In hotel buildings, when the air conditioning system uses electric heating as an auxiliary heat source, a sep…
• 第 4.2.14 条Guest rooms in hotels shall be provided with independent temperature control devices, and the air conditionin…
• 第 4.2.15 条In large spaces with high occupant density and intermittent use, such as hotel lobbies and restaurants, CO₂ c…
• 第 4.2.16 条In hotel buildings, when an all air air conditioning system is adopted, an exhaust air heat recovery device s…
• 第 4.2.17 条The cooling towers for the hotel air conditioning system shall be of the high efficiency, energy saving type;…
• 第 4.2.19 条In hotel buildings, when the air conditioning system adopts a ground source heat pump system, its energy effi…
• 第 4.2.20 条The circulating water pumps of the hotel's air conditioning water system (chilled/hot water) shall adopt vari…

Electrical

• 第 8.1.2 条The lighting power density (LPD) of hotel buildings shall not exceed the target values specified in the curre…
• 第 8.1.3 条The lighting power density values for main functional rooms in hotel buildings shall be designed in accordanc…
• 第 8.2.1 条Elevators, escalators, water pumps, fans, and other equipment in hotel buildings shall be high efficiency, en…
• 第 8.2.2 条In hotel buildings, motors with a single unit capacity of 100 kW or more (such as air conditioning chillers, …
• 第 8.2.3 条Transformers for hotel buildings shall be energy efficient transformers, and their no load losses and load lo…
• 第 8.3.1 条Hotel buildings should be equipped with an energy consumption monitoring system to meter energy such as water…
• 第 8.3.2 条The lighting system of hotel buildings shall be provided with intelligent control or energy saving control me…
• 第 8.3.3 条Energy saving controllers (e.g., card insertion power switches) shall be installed in hotel guest rooms to au…
• 第 8.3.4 条Elevators in hotel buildings should be equipped with group control, sleep mode, and variable frequency speed …
• 第 8.3.5 条Pumps, fans, and other equipment in the air conditioning system of hotel buildings shall be controlled by var…

Renewable energy utilization

• 第 4.2.1 条Solar water heating system requirements : Hotel buildings (public buildings with stable hot water demand) sha…
• 第 4.2.2 条Solar collector area calculation : The solar collector area shall be determined based on local solar resource…
• 第 4.2.3 条Solar hot water system type : Hotel buildings should adopt a centralized solar hot water system and should be…
• 第 4.2.4 条Solar PV system requirements : When the hotel building has a large roof area or suitable façade conditions, a…
• 第 4.3.1 条Applicable conditions for ground source heat pump systems : When the hotel building site has conditions for u…
• 第 4.3.2 条Air source heat pump system requirements : When a hotel building cannot use a ground source heat pump system,…
• 第 4.4.1 条Renewable energy utilization ratio calculation : The renewable energy utilization of hotel buildings (heat/co…
• 第 4.2.1 条The above clauses are based on Chapter 4 of GB 50189 2015, among which 4.2.2, 4.2.3, 4.3.1 and 4.4.1 are mand…
• 第 4.2.4 条It is a recommended provision, but if a hotel building is applying for green building certification or an ene…

Engineering reference only — verify against project conditions and the latest codes.